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Volume 12, issue 24
Biogeosciences, 12, 7379–7402, 2015
https://doi.org/10.5194/bg-12-7379-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-12-7379-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 12, 7379–7402, 2015
https://doi.org/10.5194/bg-12-7379-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-12-7379-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article 16 Dec 2015
Research article | 16 Dec 2015
Composition and sources of sedimentary organic matter in the deep eastern Mediterranean Sea
R. Pedrosa-Pàmies et al.
Related authors
C. Parinos, A. Gogou, I. Bouloubassi, R. Pedrosa-Pàmies, I. Hatzianestis, A. Sanchez-Vidal, G. Rousakis, D. Velaoras, G. Krokos, and V. Lykousis
Biogeosciences, 10, 6069–6089, https://doi.org/10.5194/bg-10-6069-2013, https://doi.org/10.5194/bg-10-6069-2013, 2013
A. Rumín-Caparrós, A. Sanchez-Vidal, A. Calafat, M. Canals, J. Martín, P. Puig, and R. Pedrosa-Pàmies
Biogeosciences, 10, 3493–3505, https://doi.org/10.5194/bg-10-3493-2013, https://doi.org/10.5194/bg-10-3493-2013, 2013
Dagmar Hainbucher, Marta Álvarez, Blanca Astray Uceda, Giancarlo Bachi, Vanessa Cardin, Paolo Celentano, Spyros Chaikalis, Maria del Mar Chaves Montero, Giuseppe Civitarese, Noelia M. Fajar, Francois Fripiat, Lennart Gerke, Alexandra Gogou, Elisa F. Guallart, Birte Gülk, Abed El Rahman Hassoun, Nico Lange, Andrea Rochner, Chiara Santinelli, Tobias Steinhoff, Toste Tanhua, Lidia Urbini, Dimitrios Velaoras, Fabian Wolf, and Andreas Welsch
Earth Syst. Sci. Data, 12, 2747–2763, https://doi.org/10.5194/essd-12-2747-2020, https://doi.org/10.5194/essd-12-2747-2020, 2020
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We report on data from an oceanographic cruise in the Mediterranean Sea (MSM72, March 2018). The main objective of the cruise was to contribute to the understanding of long-term changes and trends in physical and biogeochemical parameters, such as the anthropogenic carbon uptake, and further assess the hydrographical situation after the Eastern and Western Mediterranean Transients. Multidisciplinary measurements were conducted on a predominantly
zonal section throughout the Mediterranean Sea.
Alessandra D'Angelo, Federico Giglio, Stefano Miserocchi, Anna Sanchez-Vidal, Stefano Aliani, Tommaso Tesi, Angelo Viola, Mauro Mazzola, and Leonardo Langone
Biogeosciences, 15, 5343–5363, https://doi.org/10.5194/bg-15-5343-2018, https://doi.org/10.5194/bg-15-5343-2018, 2018
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A 6-year time series of physical parameters and particle fluxes collected by a mooring in Kongsfjorden (Svalbard) suggests that the subglacial and watershed run-off driven by air temperature are the main processes affecting the lithogenic supply. As the Arctic temperature rises, glacier material will increase accordingly. The winter inflow of warm Atlantic waters is progressively increasing, hampering the nutrient supply from the bottom waters and severely reducing the biological production.
Oscar Serrano, Paul S. Lavery, Carlos M. Duarte, Gary A. Kendrick, Antoni Calafat, Paul H. York, Andy Steven, and Peter I. Macreadie
Biogeosciences, 13, 4915–4926, https://doi.org/10.5194/bg-13-4915-2016, https://doi.org/10.5194/bg-13-4915-2016, 2016
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We explored the relationship between organic carbon and mud (i.e. silt and clay) contents in seagrass ecosystems to address whether mud can be used to predict soil C content, thereby enabling robust scaling up exercises at a low cost as part of blue carbon stock assessments. We show that mud is not a universal proxy for blue carbon content in seagrass ecosystems, but it can be used to estimate soil Corg content when low biomass seagrass species (i.e. Zostera, Halodule and Halophila) are present.
Mercè Cisneros, Isabel Cacho, Jaime Frigola, Miquel Canals, Pere Masqué, Belen Martrat, Marta Casado, Joan O. Grimalt, Leopoldo D. Pena, Giulia Margaritelli, and Fabrizio Lirer
Clim. Past, 12, 849–869, https://doi.org/10.5194/cp-12-849-2016, https://doi.org/10.5194/cp-12-849-2016, 2016
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We present a high-resolution multi-proxy study about the evolution of sea surface conditions along the last 2700 yr in the north-western Mediterranean Sea based on five sediment records from two different sites north of Minorca. The novelty of the results and the followed approach, constructing stack records from the studied proxies to preserve the most robust patterns, provides a special value to the study. This complex period appears to have significant regional changes in the climatic signal.
C. Lavoie, E. W. Domack, E. C. Pettit, T. A. Scambos, R. D. Larter, H.-W. Schenke, K. C. Yoo, J. Gutt, J. Wellner, M. Canals, J. B. Anderson, and D. Amblas
The Cryosphere, 9, 613–629, https://doi.org/10.5194/tc-9-613-2015, https://doi.org/10.5194/tc-9-613-2015, 2015
P. Malanotte-Rizzoli, V. Artale, G. L. Borzelli-Eusebi, S. Brenner, A. Crise, M. Gacic, N. Kress, S. Marullo, M. Ribera d'Alcalà, S. Sofianos, T. Tanhua, A. Theocharis, M. Alvarez, Y. Ashkenazy, A. Bergamasco, V. Cardin, S. Carniel, G. Civitarese, F. D'Ortenzio, J. Font, E. Garcia-Ladona, J. M. Garcia-Lafuente, A. Gogou, M. Gregoire, D. Hainbucher, H. Kontoyannis, V. Kovacevic, E. Kraskapoulou, G. Kroskos, A. Incarbona, M. G. Mazzocchi, M. Orlic, E. Ozsoy, A. Pascual, P.-M. Poulain, W. Roether, A. Rubino, K. Schroeder, J. Siokou-Frangou, E. Souvermezoglou, M. Sprovieri, J. Tintoré, and G. Triantafyllou
Ocean Sci., 10, 281–322, https://doi.org/10.5194/os-10-281-2014, https://doi.org/10.5194/os-10-281-2014, 2014
M. Higueras, P. Kerhervé, A. Sanchez-Vidal, A. Calafat, W. Ludwig, M. Verdoit-Jarraya, S. Heussner, and M. Canals
Biogeosciences, 11, 157–172, https://doi.org/10.5194/bg-11-157-2014, https://doi.org/10.5194/bg-11-157-2014, 2014
S. Stavrakakis, A. Gogou, E. Krasakopoulou, A. P. Karageorgis, H. Kontoyiannis, G. Rousakis, D. Velaoras, L. Perivoliotis, G. Kambouri, I. Stavrakaki, and V. Lykousis
Biogeosciences, 10, 7235–7254, https://doi.org/10.5194/bg-10-7235-2013, https://doi.org/10.5194/bg-10-7235-2013, 2013
C. Parinos, A. Gogou, I. Bouloubassi, R. Pedrosa-Pàmies, I. Hatzianestis, A. Sanchez-Vidal, G. Rousakis, D. Velaoras, G. Krokos, and V. Lykousis
Biogeosciences, 10, 6069–6089, https://doi.org/10.5194/bg-10-6069-2013, https://doi.org/10.5194/bg-10-6069-2013, 2013
N. Lampadariou, V. Kalogeropoulou, K. Sevastou, K. Keklikoglou, and J. Sarrazin
Biogeosciences, 10, 5381–5398, https://doi.org/10.5194/bg-10-5381-2013, https://doi.org/10.5194/bg-10-5381-2013, 2013
K. Sevastou, N. Lampadariou, P. N. Polymenakou, and A. Tselepides
Biogeosciences, 10, 4861–4878, https://doi.org/10.5194/bg-10-4861-2013, https://doi.org/10.5194/bg-10-4861-2013, 2013
C. Theodosi, C. Parinos, A. Gogou, A. Kokotos, S. Stavrakakis, V. Lykousis, J. Hatzianestis, and N. Mihalopoulos
Biogeosciences, 10, 4449–4464, https://doi.org/10.5194/bg-10-4449-2013, https://doi.org/10.5194/bg-10-4449-2013, 2013
A. Rumín-Caparrós, A. Sanchez-Vidal, A. Calafat, M. Canals, J. Martín, P. Puig, and R. Pedrosa-Pàmies
Biogeosciences, 10, 3493–3505, https://doi.org/10.5194/bg-10-3493-2013, https://doi.org/10.5194/bg-10-3493-2013, 2013
P. Lopez-Fernandez, S. Bianchelli, A. Pusceddu, A. Calafat, A. Sanchez-Vidal, and R. Danovaro
Biogeosciences, 10, 3405–3420, https://doi.org/10.5194/bg-10-3405-2013, https://doi.org/10.5194/bg-10-3405-2013, 2013
J. Martín, X. Durrieu de Madron, P. Puig, F. Bourrin, A. Palanques, L. Houpert, M. Higueras, A. Sanchez-Vidal, A. M. Calafat, M. Canals, S. Heussner, N. Delsaut, and C. Sotin
Biogeosciences, 10, 3221–3239, https://doi.org/10.5194/bg-10-3221-2013, https://doi.org/10.5194/bg-10-3221-2013, 2013
A. Dell'Anno, A. Pusceddu, C. Corinaldesi, M. Canals, S. Heussner, L. Thomsen, and R. Danovaro
Biogeosciences, 10, 2945–2957, https://doi.org/10.5194/bg-10-2945-2013, https://doi.org/10.5194/bg-10-2945-2013, 2013
A. Pusceddu, M. Mea, M. Canals, S. Heussner, X. Durrieu de Madron, A. Sanchez-Vidal, S. Bianchelli, C. Corinaldesi, A. Dell'Anno, L. Thomsen, and R. Danovaro
Biogeosciences, 10, 2659–2670, https://doi.org/10.5194/bg-10-2659-2013, https://doi.org/10.5194/bg-10-2659-2013, 2013
M. Stabholz, X. Durrieu de Madron, M. Canals, A. Khripounoff, I. Taupier-Letage, P. Testor, S. Heussner, P. Kerhervé, N. Delsaut, L. Houpert, G. Lastras, and B. Dennielou
Biogeosciences, 10, 1097–1116, https://doi.org/10.5194/bg-10-1097-2013, https://doi.org/10.5194/bg-10-1097-2013, 2013
Related subject area
Biogeochemistry: Open Ocean
Elevated sources of cobalt in the Arctic Ocean
Increase in ocean acidity variability and extremes under increasing atmospheric CO2
Can ocean community production and respiration be determined by measuring high-frequency oxygen profiles from autonomous floats?
Assessing the value of biogeochemical Argo profiles versus ocean color observations for biogeochemical model optimization in the Gulf of Mexico
The Southern Annular Mode (SAM) influences phytoplankton communities in the seasonal ice zone of the Southern Ocean
Southern Ocean BGC-Argo Detect Under Ice Phytoplankton Growth Before Sea Ice Retreat
Profiling float observation of thermohaline staircases in the western Mediterranean Sea and impact on nutrient fluxes
Ocean carbonate system variability in the North Atlantic Subpolar surface water (1993–2017)
Characterizing the surface microlayer in the Mediterranean Sea: trace metal concentrations and microbial plankton abundance
Spatial variations in silicate-to-nitrate ratios in Southern Ocean surface waters are controlled in the short term by physics rather than biology
Phytoplankton and dimethylsulfide dynamics at two contrasting Arctic ice edges
Experiment design and bacterial abundance control extracellular H2O2 concentrations during four series of mesocosm experiments
Dissolved iron in the North Atlantic Ocean and Labrador Sea along the GEOVIDE section (GEOTRACES section GA01)
No nitrogen fixation in the Bay of Bengal?
Trends and decadal oscillations of oxygen and nutrients at 50 to 300 m depth in the equatorial and North Pacific
Physical drivers of the nitrate seasonal variability in the Atlantic cold tongue
Coccolithophore biodiversity controls carbonate export in the Southern Ocean
Particulate Rare Earth Element behavior in the North Atlantic (GEOVIDE cruise)
Arctic (Svalbard islands) active and exported diatom stocks and cell health status
How will the key marine calcifier Emiliania huxleyi respond to a warmer and more thermally variable ocean?
Ideas and perspectives: Is dark carbon fixation relevant for oceanic primary production estimates?
Sensitivity of ocean biogeochemistry to the iron supply from the Antarctic Ice Sheet explored with a biogeochemical model
Isotopic fractionation of carbon during uptake by phytoplankton across the South Atlantic subtropical convergence
The effect of marine aggregate parameterisations on nutrients and oxygen minimum zones in a global biogeochemical model
Sensitivity of atmospheric CO2 to regional variability in particulate organic matter remineralization depths
Nutrient distribution and nitrogen and oxygen isotopic composition of nitrate in water masses of the subtropical southern Indian Ocean
What drives the latitudinal gradient in open-ocean surface dissolved inorganic carbon concentration?
Investigating the effect of El Niño on nitrous oxide distribution in the eastern tropical South Pacific
Reciprocal bias compensation and ensuing uncertainties in model-based climate projections: pelagic biogeochemistry versus ocean mixing
Inputs and processes affecting the distribution of particulate iron in the North Atlantic along the GEOVIDE (GEOTRACES GA01) section
Atmospheric deposition fluxes over the Atlantic Ocean: a GEOTRACES case study
Phytoplankton calcifiers control nitrate cycling and the pace of transition in warming icehouse and cooling greenhouse climates
Evidence of high N2 fixation rates in the temperate northeast Atlantic
The oceanic cycle of carbon monoxide and its emissions to the atmosphere
The export flux of particulate organic carbon derived from 210Po∕210Pb disequilibria along the North Atlantic GEOTRACES GA01 transect: GEOVIDE cruise
The composition and distribution of semi-labile dissolved organic matter across the southwest Pacific
Quantitative mapping and predictive modeling of Mn nodules' distribution from hydroacoustic and optical AUV data linked by random forests machine learning
Artificial radionuclides in neon flying squid from the northwestern Pacific in 2011 following the Fukushima accident
The number of past and future regenerations of iron in the ocean
and its intrinsic fertilization efficiency
Pacific Decadal Oscillation and recent oxygen decline in the eastern tropical Pacific Ocean
Introduction to the French GEOTRACES North Atlantic Transect (GA01): GEOVIDE cruise
Factors controlling coccolithophore biogeography in the Southern Ocean
The effect of salinity on the biogeochemistry of the coccolithophores with implications for coccolith-based isotopic proxies
The effect of the 2013–2016 high temperature anomaly in the subarctic Northeast Pacific (the “Blob”) on net community production
Intact polar lipids in the water column of the eastern tropical North Pacific: abundance and structural variety of non-phosphorus lipids
Evaluation of the seasonal formation of subsurface negative preformed nitrate anomalies in the subtropical North Pacific and North Atlantic
Dynamic mercury methylation and demethylation in oligotrophic marine water
High variability of particulate organic carbon export along the North Atlantic GEOTRACES section GA01 as deduced from 234Th fluxes
A model of mercury cycling and isotopic fractionation in the ocean
Mechanisms of northern North Atlantic biomass variability
Randelle M. Bundy, Alessandro Tagliabue, Nicholas J. Hawco, Peter L. Morton, Benjamin S. Twining, Mariko Hatta, Abigail E. Noble, Mattias R. Cape, Seth G. John, Jay T. Cullen, and Mak A. Saito
Biogeosciences, 17, 4745–4767, https://doi.org/10.5194/bg-17-4745-2020, https://doi.org/10.5194/bg-17-4745-2020, 2020
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Cobalt (Co) is an essential nutrient for ocean microbes and is scarce in most areas of the ocean. This study measured Co concentrations in the Arctic Ocean for the first time and found that Co levels are extremely high in the surface waters of the Canadian Arctic. Although the Co primarily originates from the shelf, the high concentrations persist throughout the central Arctic. Co in the Arctic appears to be increasing over time and might be a source of Co to the North Atlantic.
Friedrich A. Burger, Jasmin G. John, and Thomas L. Frölicher
Biogeosciences, 17, 4633–4662, https://doi.org/10.5194/bg-17-4633-2020, https://doi.org/10.5194/bg-17-4633-2020, 2020
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Ensemble simulations of an Earth system model reveal that ocean acidity extremes have increased in the past few decades and are projected to increase further in terms of frequency, intensity, duration, and volume extent. The increase is not only caused by the long-term ocean acidification due to the uptake of anthropogenic CO2, but also due to changes in short-term variability. The increase in ocean acidity extremes may enhance the risk of detrimental impacts on marine organisms.
Christopher Gordon, Katja Fennel, Clark Richards, Lynn K. Shay, and Jodi K. Brewster
Biogeosciences, 17, 4119–4134, https://doi.org/10.5194/bg-17-4119-2020, https://doi.org/10.5194/bg-17-4119-2020, 2020
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We describe a method for correcting errors in oxygen optode measurements on autonomous platforms in the ocean. The errors result from the relatively slow response time of the sensor. The correction method includes an in situ determination of the effective response time and requires the time stamps of the individual measurements. It is highly relevant for the BGC-Argo program and also applicable to gliders. We also explore if diurnal changes in oxygen can be obtained from profiling floats.
Bin Wang, Katja Fennel, Liuqian Yu, and Christopher Gordon
Biogeosciences, 17, 4059–4074, https://doi.org/10.5194/bg-17-4059-2020, https://doi.org/10.5194/bg-17-4059-2020, 2020
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We assess trade-offs between different types of biological observations, specifically satellite ocean color and BGC-Argo profiles and the benefits of combining both for optimizing a biogeochemical model of the Gulf of Mexico. Using all available observations leads to significant improvements in observed and unobserved variables (including primary production and C export). Our results highlight the significant benefits of BGC-Argo measurements for biogeochemical model optimization and validation.
Bruce L. Greaves, Andrew T. Davidson, Alexander D. Fraser, John P. McKinlay, Andrew Martin, Andrew McMinn, and Simon W. Wright
Biogeosciences, 17, 3815–3835, https://doi.org/10.5194/bg-17-3815-2020, https://doi.org/10.5194/bg-17-3815-2020, 2020
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We observed that variation in the Southern Annular Mode (SAM) over 11 years showed a relationship with the species composition of hard-shelled phytoplankton in the seasonal ice zone (SIZ) of the Southern Ocean. Phytoplankton in the SIZ are productive during the southern spring and summer when the area is ice-free, with production feeding most Antarctic life. The SAM is known to be increasing with climate change, and changes in phytoplankton in the SIZ may have implications for higher life forms.
Mark Hague and Marcello Vichi
Biogeosciences Discuss., https://doi.org/10.5194/bg-2020-257, https://doi.org/10.5194/bg-2020-257, 2020
Revised manuscript under review for BG
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This paper examines the question of what causes the rapid spring growth of microscopic marine algae (phytoplankton) in the ice covered ocean surrounding Antarctica. One prominent hypothesis proposes that the melting of sea ice is the primary cause, while our results suggest that this is only part of the explanation. In particular, we show that phytoplankton are able to start growing before the sea ice melts appreciably, much earlier than previously thought.
Vincent Taillandier, Louis Prieur, Fabrizio D'Ortenzio, Maurizio Ribera d'Alcalà, and Elvira Pulido-Villena
Biogeosciences, 17, 3343–3366, https://doi.org/10.5194/bg-17-3343-2020, https://doi.org/10.5194/bg-17-3343-2020, 2020
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This study addresses the role played by vertical diffusion in the nutrient enrichment of the Levantine intermediate waters, a process particularly relevant inside thermohaline staircases. Thanks to a high profiling frequency over a 4-year period, BGC-Argo float observations reveal the temporal continuity of the layering patterns encountered during the cruise PEACETIME and their impact on vertical and lateral transfers of nitrate between the deep reservoir and the surface productive zone.
Coraline Leseurre, Claire Lo Monaco, Gilles Reverdin, Nicolas Metzl, Jonathan Fin, Solveig Olafsdottir, and Virginie Racapé
Biogeosciences, 17, 2553–2577, https://doi.org/10.5194/bg-17-2553-2020, https://doi.org/10.5194/bg-17-2553-2020, 2020
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In this study, we investigate the evolution of CO2 uptake and ocean acidification in the North Atlantic Subpolar surface water. Our results show an important reduction in the capacity of the ocean to absorb CO2 from the atmosphere (1993–2007), due to a rapid increase in the fCO2 and associated with a rapid decrease in pH. Conversely, data obtained during the last decade (2008–2017) show a stagnation of fCO2 (increasing the ocean sink for CO2) and pH.
Antonio Tovar-Sánchez, Araceli Rodríguez-Romero, Anja Engel, Birthe Zäncker, Franck Fu, Emilio Marañón, María Pérez-Lorenzo, Matthieu Bressac, Thibaut Wagener, Sylvain Triquet, Guillaume Siour, Karine Desboeufs, and Cécile Guieu
Biogeosciences, 17, 2349–2364, https://doi.org/10.5194/bg-17-2349-2020, https://doi.org/10.5194/bg-17-2349-2020, 2020
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Residence times of particulate metals derived from aerosol deposition in the Sea Surface Microlayer of the Mediterranean Sea ranged from a couple of minutes (e.g., for Fe) to a few hours (e.g., for Cu). Microbial activity seems to play an important role in in this process and in the concentration and distribution of metals between diferent water layers.
Pieter Demuynck, Toby Tyrrell, Alberto Naveira Garabato, Mark Christopher Moore, and Adrian Peter Martin
Biogeosciences, 17, 2289–2314, https://doi.org/10.5194/bg-17-2289-2020, https://doi.org/10.5194/bg-17-2289-2020, 2020
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The availability of macronutrients N and Si is of key importance to sustain life in the Southern Ocean. N and Si are available in abundance at the southern boundary of the Southern Ocean due to constant supply from the deep ocean. In the more northern regions of the Southern Ocean, a decline in macronutrient concentration is noticed, especially strong for Si rather than N. This paper uses a simplified biogeochemical model to investigate processes responsible for this decline in concentration.
Martine Lizotte, Maurice Levasseur, Virginie Galindo, Margaux Gourdal, Michel Gosselin, Jean-Éric Tremblay, Marjolaine Blais, Joannie Charette, and Rachel Hussherr
Biogeosciences, 17, 1557–1581, https://doi.org/10.5194/bg-17-1557-2020, https://doi.org/10.5194/bg-17-1557-2020, 2020
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This study brings further support to the premise that the prevalence of younger and thinner icescapes over older and thicker ones in the Canadian High Arctic favors the early development of under-ice microorganisms as well as their production of the climate-relevant gas dimethylsulfide (DMS). Given the rapid rate of climate-driven changes in Arctic sea ice, our results suggest implications for the timing and magnitude of DMS pulses in the Arctic, with ramifications for climate forecasting.
Mark J. Hopwood, Nicolas Sanchez, Despo Polyviou, Øystein Leiknes, Julián Alberto Gallego-Urrea, Eric P. Achterberg, Murat V. Ardelan, Javier Aristegui, Lennart Bach, Sengul Besiktepe, Yohann Heriot, Ioanna Kalantzi, Tuba Terbıyık Kurt, Ioulia Santi, Tatiana M. Tsagaraki, and David Turner
Biogeosciences, 17, 1309–1326, https://doi.org/10.5194/bg-17-1309-2020, https://doi.org/10.5194/bg-17-1309-2020, 2020
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Hydrogen peroxide, H2O2, is formed naturally in sunlight-exposed water by photochemistry. At high concentrations it is undesirable to biological cells because it is a stressor. Here, across a range of incubation experiments in diverse marine environments (Gran Canaria, the Mediterranean, Patagonia and Svalbard), we determine that two factors consistently affect the H2O2 concentrations irrespective of geographical location: bacteria abundance and experiment design.
Manon Tonnard, Hélène Planquette, Andrew R. Bowie, Pier van der Merwe, Morgane Gallinari, Floriane Desprez de Gésincourt, Yoan Germain, Arthur Gourain, Marion Benetti, Gilles Reverdin, Paul Tréguer, Julia Boutorh, Marie Cheize, François Lacan, Jan-Lukas Menzel Barraqueta, Leonardo Pereira-Contreira, Rachel Shelley, Pascale Lherminier, and Géraldine Sarthou
Biogeosciences, 17, 917–943, https://doi.org/10.5194/bg-17-917-2020, https://doi.org/10.5194/bg-17-917-2020, 2020
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We investigated the spatial distribution of dissolved Fe during spring 2014, in order to understand the processes influencing the biogeochemical cycle in the North Atlantic. Our results highlighted elevated Fe close to riverine inputs at the Iberian Margin and glacial inputs at the Newfoundland and Greenland margins. Atmospheric deposition appeared to be a minor source of Fe. Convection was an important source of Fe in the Irminger Sea, which was depleted in Fe relative to nitrate.
Carolin R. Löscher, Wiebke Mohr, Hermann W. Bange, and Donald E. Canfield
Biogeosciences, 17, 851–864, https://doi.org/10.5194/bg-17-851-2020, https://doi.org/10.5194/bg-17-851-2020, 2020
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Oxygen minimum zones (OMZs) are ocean areas severely depleted in oxygen as a result of physical, chemical, and biological processes. Biologically, organic material is produced in the sea surface and exported to deeper waters, where it respires. In the Bay of Bengal (BoB), an OMZ is present, but there are traces of oxygen left. Our study now suggests that this is because one key process, nitrogen fixation, is absent in the BoB, thus preventing primary production and consecutive respiration.
Lothar Stramma, Sunke Schmidtko, Steven J. Bograd, Tsuneo Ono, Tetjana Ross, Daisuke Sasano, and Frank A. Whitney
Biogeosciences, 17, 813–831, https://doi.org/10.5194/bg-17-813-2020, https://doi.org/10.5194/bg-17-813-2020, 2020
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The influence of climate signals in the Pacific, especially the Pacific Decadal Oscillation and the North Pacific Gyre Oscillation, as well as El Niño–La Niña and an 18.6-year nodal tidal cycle on oxygen and nutrient trends is investigated. At different locations in the Pacific Ocean different climate signals dominate. Hence, not only trends related to warming but also the influence of climate signals need to be investigated to understand oxygen and nutrient changes in the ocean.
Marie-Hélène Radenac, Julien Jouanno, Christine Carine Tchamabi, Mesmin Awo, Bernard Bourlès, Sabine Arnault, and Olivier Aumont
Biogeosciences, 17, 529–545, https://doi.org/10.5194/bg-17-529-2020, https://doi.org/10.5194/bg-17-529-2020, 2020
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Satellite data and a remarkable set of in situ measurements show a main bloom of microscopic seaweed, the phytoplankton, in summer and a secondary bloom in December in the central equatorial Atlantic. They are driven by a strong vertical supply of nitrate in May–July and a shorter and moderate supply in November. In between, transport of low-nitrate water from the west explains most nitrate losses in the sunlit layer. Horizontal eddy-induced processes also contribute to seasonal nitrate removal.
Andrés S. Rigual Hernández, Thomas W. Trull, Scott D. Nodder, José A. Flores, Helen Bostock, Fátima Abrantes, Ruth S. Eriksen, Francisco J. Sierro, Diana M. Davies, Anne-Marie Ballegeer, Miguel A. Fuertes, and Lisa C. Northcote
Biogeosciences, 17, 245–263, https://doi.org/10.5194/bg-17-245-2020, https://doi.org/10.5194/bg-17-245-2020, 2020
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Coccolithophores account for a major fraction of the carbonate produced in the world's oceans. However, their contribution in the subantarctic Southern Ocean remains undocumented. We quantitatively partition calcium carbonate fluxes amongst coccolithophore species in the Australian–New Zealand sector of the Southern Ocean. We provide new insights into the importance of species other than Emiliania huxleyi in the carbon cycle and assess their possible response to projected environmental change.
Marion Lagarde, Nolwenn Lemaitre, Hélène Planquette, Mélanie Grenier, Moustafa Belhadj, Pascale Lherminier, and Catherine Jeandel
Biogeosciences Discuss., https://doi.org/10.5194/bg-2019-462, https://doi.org/10.5194/bg-2019-462, 2020
Revised manuscript accepted for BG
Susana Agustí, Jeffrey W. Krause, Israel A. Marquez, Paul Wassmann, Svein Kristiansen, and Carlos M. Duarte
Biogeosciences, 17, 35–45, https://doi.org/10.5194/bg-17-35-2020, https://doi.org/10.5194/bg-17-35-2020, 2020
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We found that 24 % of the total diatoms community in the Arctic water column (450 m depth) was located below the photic layer. Healthy diatom communities in active spring–bloom stages remained in the photic layer. Dying diatom communities exported a large fraction of the biomass to the aphotic zone, fuelling carbon sequestration and benthic ecosystems in the Arctic. The results of the study conform to a conceptual model where diatoms grow during the bloom until silicic acid stocks are depleted.
Xinwei Wang, Feixue Fu, Pingping Qu, Joshua D. Kling, Haibo Jiang, Yahui Gao, and David A. Hutchins
Biogeosciences, 16, 4393–4409, https://doi.org/10.5194/bg-16-4393-2019, https://doi.org/10.5194/bg-16-4393-2019, 2019
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In this study, we examine the responses of E. huxleyi to a future warmer and more thermally variable ocean. Elevated temperatures and thermal variation have negative effects on growth rate and physiology that are especially pronounced at high temperatures, but high-frequency thermal variation may reduce the risk of extreme high-temperature events. These findings have potentially large implications for ocean productivity and marine biogeochemical cycles under a future changing climate.
Federico Baltar and Gerhard J. Herndl
Biogeosciences, 16, 3793–3799, https://doi.org/10.5194/bg-16-3793-2019, https://doi.org/10.5194/bg-16-3793-2019, 2019
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Around half of the global primary production (PP) is produced in the ocean. Here we quantified how much oceanic PP estimates would increase if we included the dark DIC fixation rates (which are usually excluded in the carbon-14 method) into the PP estimation. We found that the inclusion of dark DIC fixation would increase PP estimates by 5–22 %. This represents ca. 1.2 to 11 Pg C yr−1 of newly synthesized organic carbon available for the marine food web.
Renaud Person, Olivier Aumont, Gurvan Madec, Martin Vancoppenolle, Laurent Bopp, and Nacho Merino
Biogeosciences, 16, 3583–3603, https://doi.org/10.5194/bg-16-3583-2019, https://doi.org/10.5194/bg-16-3583-2019, 2019
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The Antarctic Ice Sheet is considered a possibly important but largely overlooked source of iron (Fe). Here we explore its fertilization capacity by evaluating the response of marine biogeochemistry to Fe release from icebergs and ice shelves in a global ocean model. Large regional impacts are simulated, leading to only modest primary production and carbon export increases at the scale of the Southern Ocean. Large uncertainties are due to low observational constraints on modeling choices.
Robyn E. Tuerena, Raja S. Ganeshram, Matthew P. Humphreys, Thomas J. Browning, Heather Bouman, and Alexander P. Piotrowski
Biogeosciences, 16, 3621–3635, https://doi.org/10.5194/bg-16-3621-2019, https://doi.org/10.5194/bg-16-3621-2019, 2019
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The carbon isotopes in algae can be used to predict food sources and environmental change. We explore how dissolved carbon is taken up by algae in the South Atlantic Ocean and how this affects their carbon isotope signature. We find that cell size controls isotope fractionation. We use our results to investigate how climate change may impact the carbon isotopes in algae. We suggest a shift to smaller algae in this region would decrease the carbon isotope ratio at the base of the food web.
Daniela Niemeyer, Iris Kriest, and Andreas Oschlies
Biogeosciences, 16, 3095–3111, https://doi.org/10.5194/bg-16-3095-2019, https://doi.org/10.5194/bg-16-3095-2019, 2019
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Recent studies suggest spatial variations of the marine particle flux length scale. Using a global biogeochemical ocean model, we investigate whether changes in particle size and size-dependent sinking can explain this variation. We address uncertainties by varying aggregate properties and circulation. Both aspects have an impact on the representation of nutrients, oxygen and oxygen minimum zones. The formation and sinking of large aggregates in productive areas lead to deeper flux penetration.
Jamie D. Wilson, Stephen Barker, Neil R. Edwards, Philip B. Holden, and Andy Ridgwell
Biogeosciences, 16, 2923–2936, https://doi.org/10.5194/bg-16-2923-2019, https://doi.org/10.5194/bg-16-2923-2019, 2019
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The remains of plankton rain down from the surface ocean to the deep ocean, acting to store CO2 in the deep ocean. We used a model of biology and ocean circulation to explore the importance of this process in different regions of the ocean. The amount of CO2 stored in the deep ocean is most sensitive to changes in the Southern Ocean. As plankton in the Southern Ocean are likely those most impacted by future climate change, the amount of CO2 they store in the deep ocean could also be affected.
Natalie C. Harms, Niko Lahajnar, Birgit Gaye, Tim Rixen, Kirstin Dähnke, Markus Ankele, Ulrich Schwarz-Schampera, and Kay-Christian Emeis
Biogeosciences, 16, 2715–2732, https://doi.org/10.5194/bg-16-2715-2019, https://doi.org/10.5194/bg-16-2715-2019, 2019
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The Indian Ocean subtropical gyre is a large oligotrophic area that is likely to adjust to continued warming by increasing stratification, reduced nutrient supply and decreasing biological production. In this study, we investigated concentrations of nutrients and stable isotopes of nitrate. We determine the lateral influence of water masses entering the gyre from the northern Indian Ocean and from the Southern Ocean and quantify the input of nitrogen by N2 fixation into the surface layer.
Yingxu Wu, Mathis P. Hain, Matthew P. Humphreys, Sue Hartman, and Toby Tyrrell
Biogeosciences, 16, 2661–2681, https://doi.org/10.5194/bg-16-2661-2019, https://doi.org/10.5194/bg-16-2661-2019, 2019
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This study takes advantage of the GLODAPv2 database to investigate the processes driving the surface ocean dissolved inorganic carbon distribution, with the focus on its latitudinal gradient between the polar oceans and the low-latitude oceans. Based on our quantitative study, we find that temperature-driven CO2 gas exchange and high-latitude upwelling of DIC- and TA-rich deep waters are the two major drivers, with the importance of the latter not having been previously realized.
Qixing Ji, Mark A. Altabet, Hermann W. Bange, Michelle I. Graco, Xiao Ma, Damian L. Arévalo-Martínez, and Damian S. Grundle
Biogeosciences, 16, 2079–2093, https://doi.org/10.5194/bg-16-2079-2019, https://doi.org/10.5194/bg-16-2079-2019, 2019
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A strong El Niño event occurred in the Peruvian coastal region in 2015–2016, during which higher sea surface temperatures co-occurred with significantly lower sea-to-air fluxes of nitrous oxide, an important greenhouse gas and ozone depletion agent. Stratified water column during El Niño retained a larger amount of nitrous oxide that was produced via multiple microbial pathways; and intense nitrous oxide effluxes could occur when normal upwelling is resumed after El Niño.
Ulrike Löptien and Heiner Dietze
Biogeosciences, 16, 1865–1881, https://doi.org/10.5194/bg-16-1865-2019, https://doi.org/10.5194/bg-16-1865-2019, 2019
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Anthropogenic greenhouse gas emissions trigger complex climate feedbacks. Output form Earth system models provides a basis for related political decision-making. One challenge is to arrive at reliable model parameter estimates for the ocean biogeochemistry module. We illustrate pitfalls through which flaws in the ocean module are masked by wrongly tuning the biogeochemistry and discuss ensuing uncertainties in climate projections.
Arthur Gourain, Hélène Planquette, Marie Cheize, Nolwenn Lemaitre, Jan-Lukas Menzel Barraqueta, Rachel Shelley, Pascale Lherminier, and Géraldine Sarthou
Biogeosciences, 16, 1563–1582, https://doi.org/10.5194/bg-16-1563-2019, https://doi.org/10.5194/bg-16-1563-2019, 2019
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The GEOVIDE cruise (May–June 2014, R/V Pourquoi Pas?) aimed to provide a better understanding of trace metal biogeochemical cycles in the North Atlantic. As particles play a key role in the global biogeochemical cycle of trace elements in the ocean, we discuss the distribution of particulate iron (PFe). Lithogenic sources appear to dominate the PFe cycle through margin and benthic inputs.
Jan-Lukas Menzel Barraqueta, Jessica K. Klar, Martha Gledhill, Christian Schlosser, Rachel Shelley, Hélène F. Planquette, Bernhard Wenzel, Geraldine Sarthou, and Eric P. Achterberg
Biogeosciences, 16, 1525–1542, https://doi.org/10.5194/bg-16-1525-2019, https://doi.org/10.5194/bg-16-1525-2019, 2019
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We used surface water dissolved aluminium concentrations collected in four different GEOTRACES cruises to determine atmospheric deposition fluxes to the ocean. We calculate atmospheric deposition fluxes for largely under-sampled regions of the Atlantic Ocean and thus provide new constraints for models of atmospheric deposition. The use of the MADCOW model is of major importance as dissolved aluminium is analysed within the GEOTRACES project at high spatial resolution.
Karin F. Kvale, Katherine E. Turner, Angela Landolfi, and Katrin J. Meissner
Biogeosciences, 16, 1019–1034, https://doi.org/10.5194/bg-16-1019-2019, https://doi.org/10.5194/bg-16-1019-2019, 2019
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Drivers motivating the evolution of calcifying phytoplankton are poorly understood. We explore differences in global ocean chemistry with and without calcifiers during rapid climate changes. We find the presence of phytoplankton calcifiers stabilizes the volume of low oxygen regions and consequently stabilizes the concentration of nitrate, which is an important nutrient required for photosynthesis. By stabilizing nitrate concentrations, calcifiers improve their growth conditions.
Debany Fonseca-Batista, Xuefeng Li, Virginie Riou, Valérie Michotey, Florian Deman, François Fripiat, Sophie Guasco, Natacha Brion, Nolwenn Lemaitre, Manon Tonnard, Morgane Gallinari, Hélène Planquette, Frédéric Planchon, Géraldine Sarthou, Marc Elskens, Julie LaRoche, Lei Chou, and Frank Dehairs
Biogeosciences, 16, 999–1017, https://doi.org/10.5194/bg-16-999-2019, https://doi.org/10.5194/bg-16-999-2019, 2019
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Dinitrogen fixation and primary production were investigated using stable isotope incubation experiments along two transects off the Western Iberian Margin in May 2014 close to the end of the phytoplankton spring bloom. We observed substantial N2 fixation activities (up to 1533 µmol N m-2 d-1) associated with a predominance of unicellular cyanobacteria and non-cyanobacterial diazotrophs, which seemed to be promoted by the presence of bloom-derived organic matter and excess phosphorus.
Ludivine Conte, Sophie Szopa, Roland Séférian, and Laurent Bopp
Biogeosciences, 16, 881–902, https://doi.org/10.5194/bg-16-881-2019, https://doi.org/10.5194/bg-16-881-2019, 2019
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The ocean is a source of atmospheric carbon monoxide, a key component for the oxidizing capacity of the atmosphere. We use a global ocean biogeochemistry model to dynamically assess the oceanic CO budget and its emission to the atmosphere at the global scale. The total emissions of CO to the atmosphere are 4.0 Tg C yr−1. The oceanic CO emission maps produced are relevant for use by atmospheric chemical models, especially to study the oxidizing capacity of the atmosphere above the remote ocean.
Yi Tang, Nolwenn Lemaitre, Maxi Castrillejo, Montserrat Roca-Martí, Pere Masqué, and Gillian Stewart
Biogeosciences, 16, 309–327, https://doi.org/10.5194/bg-16-309-2019, https://doi.org/10.5194/bg-16-309-2019, 2019
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Oceanographers try to understand the ocean’s role in the global carbon cycle. Trace levels of natural radionuclides can inform this connection and their half-lives provide an estimate of the timing of processes. We used the 210Po and 210Pb pair to examine the export of carbon from the surface ocean to depth along the GEOVIDE GEOTRACES cruise track. We found that the flux was regionally variable, that upwelling was an important regional factor, and that both large and small particles drove flux.
Christos Panagiotopoulos, Mireille Pujo-Pay, Mar Benavides, France Van Wambeke, and Richard Sempéré
Biogeosciences, 16, 105–116, https://doi.org/10.5194/bg-16-105-2019, https://doi.org/10.5194/bg-16-105-2019, 2019
Iason-Zois Gazis, Timm Schoening, Evangelos Alevizos, and Jens Greinert
Biogeosciences, 15, 7347–7377, https://doi.org/10.5194/bg-15-7347-2018, https://doi.org/10.5194/bg-15-7347-2018, 2018
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The use of high-resolution hydroacoustic and optic data acquired by an autonomous underwater vehicle can give us detailed sea bottom topography and valuable information regarding manganese nodules' spatial distribution. Moreover, the combined use of these data sets with a random forest machine learning model can extend this spatial prediction beyond the areas with available photos, providing researchers with a new mapping tool for further investigation and links with other data.
Wen Yu, Mathew P. Johansen, Jianhua He, Wu Men, and Longshan Lin
Biogeosciences, 15, 7235–7242, https://doi.org/10.5194/bg-15-7235-2018, https://doi.org/10.5194/bg-15-7235-2018, 2018
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To better understand the impact of the Fukushima accident on commercial marine species, neon flying squid samples obtained from the NW Pacific in Nov 2011 were analyzed for a range of radionuclides. Elevated levels of Cs-134 and Ag-110m from the Fukushima accident were found in the samples, with an extremely high concentration ratio for Ag-110m. However, the radiological dose for squid living in the study area, and for human consumers of these squid, was far below the recommended dose limits.
and its intrinsic fertilization efficiency
Benoît Pasquier and Mark Holzer
Biogeosciences, 15, 7177–7203, https://doi.org/10.5194/bg-15-7177-2018, https://doi.org/10.5194/bg-15-7177-2018, 2018
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We analyze data-constrained state estimates of the global marine iron cycle, a key control on the ocean's biological carbon pump. We develop new techniques for counting the iron's number of passages through the biological pump and link this number to the ocean's natural iron fertilization efficiency. We find that the majority of iron is not biologically utilized before being scavenged, and we identify the central equatorial Pacific as having the highest iron fertilization efficiency.
Olaf Duteil, Andreas Oschlies, and Claus W. Böning
Biogeosciences, 15, 7111–7126, https://doi.org/10.5194/bg-15-7111-2018, https://doi.org/10.5194/bg-15-7111-2018, 2018
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Oxygen-depleted regions of the Pacific Ocean are currently expanding, which is threatening marine habitats. Based on numerical simulations, we show that the decrease in the intensity of the trade winds and the subsequent slowdown of the oceanic currents lead to a reduction in oxygen supply. Our study suggests that the prevailing positive conditions of the Pacific Decadal Oscillation since 1975, a major source of natural variability, may explain a significant part of the current deoxygenation.
Géraldine Sarthou, Pascale Lherminier, Eric P. Achterberg, Fernando Alonso-Pérez, Eva Bucciarelli, Julia Boutorh, Vincent Bouvier, Edward A. Boyle, Pierre Branellec, Lidia I. Carracedo, Nuria Casacuberta, Maxi Castrillejo, Marie Cheize, Leonardo Contreira Pereira, Daniel Cossa, Nathalie Daniault, Emmanuel De Saint-Léger, Frank Dehairs, Feifei Deng, Floriane Desprez de Gésincourt, Jérémy Devesa, Lorna Foliot, Debany Fonseca-Batista, Morgane Gallinari, Maribel I. García-Ibáñez, Arthur Gourain, Emilie Grossteffan, Michel Hamon, Lars Eric Heimbürger, Gideon M. Henderson, Catherine Jeandel, Catherine Kermabon, François Lacan, Philippe Le Bot, Manon Le Goff, Emilie Le Roy, Alison Lefèbvre, Stéphane Leizour, Nolwenn Lemaitre, Pere Masqué, Olivier Ménage, Jan-Lukas Menzel Barraqueta, Herlé Mercier, Fabien Perault, Fiz F. Pérez, Hélène F. Planquette, Frédéric Planchon, Arnout Roukaerts, Virginie Sanial, Raphaëlle Sauzède, Catherine Schmechtig, Rachel U. Shelley, Gillian Stewart, Jill N. Sutton, Yi Tang, Nadine Tisnérat-Laborde, Manon Tonnard, Paul Tréguer, Pieter van Beek, Cheryl M. Zurbrick, and Patricia Zunino
Biogeosciences, 15, 7097–7109, https://doi.org/10.5194/bg-15-7097-2018, https://doi.org/10.5194/bg-15-7097-2018, 2018
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The GEOVIDE cruise (GEOTRACES Section GA01) was conducted in the North Atlantic Ocean and Labrador Sea in May–June 2014. In this special issue, results from GEOVIDE, including physical oceanography and trace element and isotope cyclings, are presented among 17 articles. Here, the scientific context, project objectives, and scientific strategy of GEOVIDE are provided, along with an overview of the main results from the articles published in the special issue.
Cara Nissen, Meike Vogt, Matthias Münnich, Nicolas Gruber, and F. Alexander Haumann
Biogeosciences, 15, 6997–7024, https://doi.org/10.5194/bg-15-6997-2018, https://doi.org/10.5194/bg-15-6997-2018, 2018
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Using a regional ocean model, we find that coccolithophore biomass in the Southern Ocean is highest in the subantarctic in late summer when diatom growth becomes limited by silicate. We show that zooplankton grazing is crucial to explain phytoplankton biomass distributions in this area and conclude that assessments of future distributions should not only consider physical and chemical factors (temperature, light, nutrients, pH), but also interactions with other phytoplankton or zooplankton.
Michaël Hermoso and Marceau Lecasble
Biogeosciences, 15, 6761–6772, https://doi.org/10.5194/bg-15-6761-2018, https://doi.org/10.5194/bg-15-6761-2018, 2018
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This work examines the effect of salinity changes on the biogeochemistry of the coccolithophores with a palaeoproxy perspective. Although substantial changes in growth rate are observed between cells grown under various salinities, these physiological changes have no significant impact on the oxygen isotope composition of their biominerals. Thus, established coccolith δ18O / temperature calibrations are not complicated by salinity. By contrast, it does influence coccolith δ13C values.
Bo Yang, Steven R. Emerson, and M. Angelica Peña
Biogeosciences, 15, 6747–6759, https://doi.org/10.5194/bg-15-6747-2018, https://doi.org/10.5194/bg-15-6747-2018, 2018
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A large anomalously warm water patch appeared in the NE Pacific in winter 2013–14 and persisted through 2016. Its effect on biological carbon export was determined using O2 and dissolved inorganic carbon data from a profiling float and a surface mooring. Results show the carbon export decreased after the first year when warmer water invaded and then returned to the previous value, with a similar trend in phytoplankton abundance and corresponding changes in phytoplankton community composition.
Florence Schubotz, Sitan Xie, Julius S. Lipp, Kai-Uwe Hinrichs, and Stuart G. Wakeham
Biogeosciences, 15, 6481–6501, https://doi.org/10.5194/bg-15-6481-2018, https://doi.org/10.5194/bg-15-6481-2018, 2018
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Organisms living in natural environments have to cope with constantly fluctuating conditions in order to compete and survive. Hereby, membrane lipids may play an integral role. This study demonstrates that the lipid repertoire and lipid modifications in marine picoplankton living in oxygen minimum zones may be larger than previously thought. The abundant presence of non-phosphorus lipids hint at nutrient limitation within deeper depths of the ocean, even though these are not considered as such.
Robert T. Letscher and Tracy A. Villareal
Biogeosciences, 15, 6461–6480, https://doi.org/10.5194/bg-15-6461-2018, https://doi.org/10.5194/bg-15-6461-2018, 2018
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The formation rates of oxygen to nitrogen anomalies in the subtropical North Pacific and North Atlantic were estimated from time series data. We find that vertically migrating phytoplankton, which traverse ~ 100–150 m in the upper ocean over days to acquire nutrients from waters at depth and return to the surface for photosynthesis, likely explain the observed anomalies and help sustain surface ocean productivity and the biological pump throughout the annual cycle in the subtropical ocean.
Kathleen M. Munson, Carl H. Lamborg, Rene M. Boiteau, and Mak A. Saito
Biogeosciences, 15, 6451–6460, https://doi.org/10.5194/bg-15-6451-2018, https://doi.org/10.5194/bg-15-6451-2018, 2018
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Methylmercury accumulates in marine organisms and is produced by bacterial processes in sediment systems. To date, the contribution of these processes to the marine water column is poorly understood. We measured noncellular production and breakdown of methylmercury in equatorial Pacific waters. We observed enhanced production in filtered waters that suggests noncellular processes result in rapid mercury transformations and, in turn, control methylmercury concentrations in the open ocean.
Nolwenn Lemaitre, Frédéric Planchon, Hélène Planquette, Frank Dehairs, Debany Fonseca-Batista, Arnout Roukaerts, Florian Deman, Yi Tang, Clarisse Mariez, and Géraldine Sarthou
Biogeosciences, 15, 6417–6437, https://doi.org/10.5194/bg-15-6417-2018, https://doi.org/10.5194/bg-15-6417-2018, 2018
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We investigated the surface particulate organic carbon export fluxes in the North Atlantic with the objective of better understanding the biological carbon pump. Our results highlighted that exports depended on the intensity and stage of the bloom, the phytoplankton size and community structures. After comparing with primary production, we concluded that, during our study, the North Atlantic behaves like most of the highly productive areas in the world's ocean, with a low export efficiency.
David E. Archer and Joel D. Blum
Biogeosciences, 15, 6297–6313, https://doi.org/10.5194/bg-15-6297-2018, https://doi.org/10.5194/bg-15-6297-2018, 2018
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Humans have had a huge impact on the mercury cycle in the biosphere, but it is difficult to follow the mercury cycle because mercury has so many mobile forms, as gases in the atmosphere and solutes in water. Mercury isotopes constrain mercury fluxes and sources, because mercury has many stable isotopes, and different fractionation mechanisms have different fingerprints in those isotopic compositions. We present the first model of mercury isotopic composition in the ocean.
Galen A. McKinley, Alexis L. Ritzer, and Nicole S. Lovenduski
Biogeosciences, 15, 6049–6066, https://doi.org/10.5194/bg-15-6049-2018, https://doi.org/10.5194/bg-15-6049-2018, 2018
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Phytoplankton biomass changed significantly in the North Atlantic north of 40° N over 1998–2007. With a physical-ecosystem model, we show that biomass increases in the northwest are due to reduced vertical mixing that partially relieves light limitation of phytoplankton. To the east, these circulation changes lead to fewer nutrients being supplied horizontally from the west. Relationships between these biomass variations and atmosphere and ocean physics are not straightforward.
Cited articles
Amblàs, D., Canals, M., Lastras, G., Berné, S., and Loubrieu, B.: Imaging the Seascapes of the Mediterranean, Oceanography, 17, 144–155, https://doi.org/10.5670/oceanog.2004.11, 2004.
Bensi, M., Cardin, V., Rubino, A., Notarstefano, G., and Poulain, P. M.: Effects of winter convection on the deep layer of the Southern Adriatic Sea in 2012, J. Geophys. Res.-Oceans, 118, 6064–6075, https://doi.org/10.1002/2013JC009432, 2013.
Bergamaschi, B. A., Tsamakis, E., Keil, R. G., Eglinton, T. I., Montluçon, D. B., and Hedges, J. I.: The effect of grain size and surface area on organic matter, lignin and carbohydrate concentration, and molecular compositions in Peru Margin sediments, Geochim. Cosmochim. Acta, 61, 1247–1260, https://doi.org/10.1016/S0016-7037(96)00394-8, 1997.
Bethoux, J. P.: Budgets of the Mediterranean Sea. Their dependence on the local climate and on the characteristics of the Atlantic waters, Oceanol. Acta, 2, 157–163, 1979.
Bethoux, J. P.: Oxygen consumption, new production, vertical advection and environmental evolution in the Mediterranean Sea, Deep-Sea Res., 36, 769–781, https://doi.org/10.1016/0198-0149(89)90150-7, 1989.
Bianchi, A., Tholosan, O., Garcin, J., Polychronaki, T., Tselepides, A., Buscail, R., and Duineveld, G.: Microbial activities at the benthic boundary layer in the Aegean Sea, Prog. Oceanogr., 57, 219–236, https://doi.org/10.1016/S0079-6611(03)00034-X, 2003.
Blott, S. J. and Pye, K.: GRADISTAT: a grain size distribution and statistics package for the analysis of unconsolidated sediments, Earth Surf. Proc. Land., 26, 1237–1248, https://doi.org/10.1002/esp.261, 2001.
Bosc, E., Bricaud, A., and Antoine, D.: Seasonal and interannual variability in algal biomass and primary production in the Mediterranean Sea, as derived from 4 years of SeaWiFS observations, Global Biogeochem. Cy., 18, GB1005, https://doi.org/10.1029/2003GB002034, 2004.
Bouloubassi, I., Lipiatou, E., Saliot, A., Tolosa, I., Bayona, J. M., and Albaigés, J.: Carbon sources and cycle in the western Mediterranean-the use of molecular markers to determine the origin of organic matter, Deep-Sea Res. Pt. II, 44, 781–799, https://doi.org/10.1016/S0967-0645(96)00094-X, 1997.
Burdige, D. J.: Preservation of organic matter in marine sediments: controls, mechanisms, and an imbalance in sediment organic carbon budgets?, Chem. Rev., 107, 467–485, https://doi.org/10.1021/cr050347q, 2007.
Canals, M., Danovaro, R., Heussner, S., Lykousis, V., Puig, P., Trincardi, F., Calafat, A., Durrieu de Madron, X., and Palanques, A.: Cascades in Mediterranean Submarine Grand Canyons, Oceanography, 22, 26–43, https://doi.org/10.5670/oceanog.2009.03, 2009.
Carlier, A., Ritt, B., Rodrigues, C. F., Sarrazin, J., Olu, K., Grall, J., and Clavier, J.: Heterogeneous energetic pathways and carbon sources on deep eastern Mediterranean cold seep communities, Mar. Biol., 157, 2545–2565, https://doi.org/10.1007/s00227-010-1518-1, 2010.
Castro-Jiménez, J., Berrojalbiz, N., Wollgast, J., and Dachs, J.: Polycyclic Aromatic Hydrocarbons (PAHs) in the Mediterranean Sea: atmospheric occurrence, deposition and decoupling with settling fluxes in the water column, Environ. Pollut., 166, 40–47, https://doi.org/10.1016/j.envpol.2012.03.003, 2012.
Chester, R., Baxter, G. G., Behairy, A. K. A., Connor, K., Cross, D., Elderfield, H., and Padgham, R. C.: Soil-sized eolian dusts from the lower troposphere of the eastern Mediterranean Sea, Mar. Geol., 24, 201–217, https://doi.org/10.1016/0025-3227(77)90028-7, 1977.
Collatz, G. J., Berry, J. a., and Clark, J. S.: Effects of climate and atmospheric CO2 partial pressure on the global distribution of C4 grasses: present, past, and future, Oecologia, 114, 441–454, https://doi.org/10.1007/s004420050468, 1998.
Collister, J. W., Rieley, G., Stern, B., Eglinton, G., and Fry, B.: Compound-specific δ13C analyses of leaf lipids from plants with differing carbon dioxide metabolisms, Org. Geochem., 21, 619–627, https://doi.org/10.1016/0146-6380(94)90008-6, 1994.
Correggiari, A., Guerzoni, S., Lenaz, R., Quarantotto, G., and Rampazzo, G.: Dust deposition in the central Mediterranean (Tyrrhenian and Adriatic Seas): relationships with marine sediments and riverine input, Terra Nova, 1, 549–558, https://doi.org/10.1111/j.1365-3121.1989.tb00431.x, 1989.
Cros, L.: Calcareous nannoplankton in surficial sediments of the Catalano-Balearic Sea (northeastern Mediterranean), in: 5th INA Conference in Salamanca Proceedings, 47–59, 1995.
Danovaro, R., Company, J. B., Corinaldesi, C., D'Onghia, G., Galil, B., Gambi, C., Gooday, A. J., Lampadariou, N., Luna, G. M., Morigi, C., Olu, K., Polymenakou, P. N., Ramirez-Llodra, E., Sabbatini, A., Sardà, F., Sibuet, M., and Tselepides, A.: Deep-sea biodiversity in the Mediterranean Sea: the known, the unknown, and the unknowable, PLoS One, 5, e11832, https://doi.org/10.1371/journal.pone.0011832, 2010.
Danovaro, R., Company, J. B., Corinaldesi, C., D'Onghia, G., Galil, B., Gambi, C., Gooday, A. J., Lampadariou, N., Luna, G. M., Morigi, C., Olu, K., Polymenakou, P. N., Ramirez-Llodra, E., Sabbatini, A., Sardà, F., Sibuet, M. and Tselepides, A.: Deep-sea biodiversity in the Mediterranean Sea: the known, the unknown, and the unknowable., PLoS One, 5, e11832, https://doi.org/10.1371/journal.pone.0011832, 2010.
Di Leonardo, R., Vizzini, S., Bellanca, A., and Mazzola, A.: Sedimentary record of anthropogenic contaminants (trace metals and PAHs) and organic matter in a Mediterranean coastal area (Gulf of Palermo, Italy), J. Marine Syst., 78, 136–145, https://doi.org/10.1016/j.jmarsys.2009.04.004, 2009.
Durrieu de Madron, X., Abassi, A., Heussner, S., Monaco, A., Aloisi, J. C., Radakovitch, O., Giresse, P., Buscail, R., and Kerherve, P.: Particulate matter and organic carbon budgets for the Gulf of Lions (NW Mediterranean), Oceanol. Acta, 23, 717–730, https://doi.org/10.1016/S0399-1784(00)00119-5, 2000.
Eglinton, G. and Hamilton, R. J.: Leaf epicuticular waxes, Science, 156, 1322–1335, https://doi.org/10.1126/science.156.3780.1322, 1967.
Eglinton, T. I., Eglinton, G., Dupont, L., Sholkovitz, E. R., Montluçon, D., and Reddy, C. M.: Composition, age, and provenance of organic matter in NW African dust over the Atlantic Ocean, Geochemistry, Geophys. Geosystems, 3, 1–27, 2002.
Ehrmann, W., Schmiedl, G., Hamann, Y., Kuhnt, T., Hemleben, C., and Siebel, W.: Clay minerals in late glacial and Holocene sediments of the northern and southern Aegean Sea, Palaeogeogr. Palaeocl., 249, 36–57, https://doi.org/10.1016/j.palaeo.2007.01.004, 2007.
Emelyanov, E. M. and Shimkus, K. M.: Geochemistry and Sedimentology of the Mediterranean Sea, D. Reidel Publishing Company, Dordrecht, the Netherlands, 1986.
Folk, R. L. and Ward, W. C.: Brazos River bar: a study in the significance of grain size parameters, J. Sediment. Res., 27, 3–26, https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D, 1957.
Frenz, M., Baumann, K. H., Boeckel, B., Hoppner, R., and Henrich, R.: Quantification of foraminifer and coccolith carbonate in South Atlantic surface sediments by means of carbonate grain-size distributions, J. Sediment. Res., 75, 464–475, https://doi.org/10.2110/jsr.2005.036, 2005.
Friedman, G. M.: Trace elements as possible environmental indicators in carbonate sediments, in: Depos. Environ. Carbonate Rocks, 193–198, 1969.
Friligos, N., Moriki, A., Sklivagou, E., Krasakopoulou, E., and Hatzianestis, I.: Geochemical characteristics of the surficial sediments of the Aegean Sea, in: 3rd MTP-MATER Workshop, Rhodos, vol. 35, 28–209, 1998.
Garcia-Orellana, J., Pates, J. M., Masqué, P., Bruach, J. M., and Sanchez-Cabeza, J. A.: Distribution of artificial radionuclides in deep sediments of the Mediterranean Sea, Sci. Total Environ., 407, 887–898, https://doi.org/10.1016/j.scitotenv.2008.09.018, 2009.
Goericke, R. and Fry, B.: Variations of marine plankton δ13C with latitude, temperature, and dissolved CO2 in the world ocean, Global Biogeochem. Cy., 8, 85–90, https://doi.org/10.1029/93GB03272, 1994.
Gogou, A. and Stephanou, E. G.: Marine organic geochemistry of the Eastern Mediterranean, Mar. Chem., 85, 1–25, https://doi.org/10.1016/j.marchem.2003.08.005, 2004.
Gogou, A., Stratigakis, N., Kanakidou, M., and Stephanou, E. G.: Organic aerosols in Eastern Mediterranean: components source reconciliation by using molecular markers and atmospheric back trajectories, Org. Geochem., 25, 79–96, https://doi.org/10.1016/S0146-6380(96)00105-2, 1996.
Gogou, A., Apostolaki, M., and Stephanou, E. G.: Determination of organic molecular markers in marine aerosols and sediments: one-step flash chromatography compound class fractionation and capillary gas chromatographic analysis, J. Chromatogr. A, 799, 215–231, https://doi.org/10.1016/S0021-9673(97)01106-0, 1998.
Gogou, A., Bouloubassi, I., and Stephanou, E. G.: Marine organic geochemistry of the Eastern Mediterranean: 1. aliphatic and polyaromatic hydrocarbons in Cretan Sea surficial sediments, Mar. Chem., 68, 265–282, https://doi.org/10.1016/S0304-4203(99)00082-1, 2000.
Gogou, A., Bouloubassi, I., Lykousis, V., Arnaboldi, M., Gaitani, P., and Meyers, P. A.: Organic geochemical evidence of Late Glacial–Holocene climate instability in the North Aegean Sea, Palaeogeogr. Palaeocl., 256, 1–20, https://doi.org/10.1016/j.palaeo.2007.08.002, 2007.
Gogou, A., Sanchez-Vidal, A., Durrieu de Madron, X., Stavrakakis, S., Calafat, A., Stabholz, M., Psarra, S., Canals, M., Heussner, S., Stavrakaki, I., and Papathanassiou, E.: Carbon flux to the deep in three open sites of the Southern European Seas (SES), J. Marine Syst., 129, 224–233, https://doi.org/10.1016/j.jmarsys.2013.05.013, 2014.
Goñi, M. A., Ruttenberg, K. C., and Eglinton, T. I.: A reassessment of the sources and importance of land-derived organic matter in surface sediments from the Gulf of Mexico, Geochim. Cosmochim. Ac., 62, 3055–3075, https://doi.org/10.1016/S0016-7037(98)00217-8, 1998.
Goñi, M. A., Teixeira, M. J., and Perkey, D. W.: Sources and distribution of organic matter in a river-dominated estuary (Winyah Bay, SC, USA), Estuar. Coast. Shelf S., 57, 1023–1048, https://doi.org/10.1016/S0272-7714(03)00008-8, 2003.
Goñi, M. A., Monacci, N., Gisewhite, R., Ogston, A., Crockett, J., and Nittrouer, C.: Distribution and sources of particulate organic matter in the water column and sediments of the Fly River Delta, Gulf of Papua (Papua New Guinea), Estuar. Coast. Shelf S., 69, 225–245, https://doi.org/10.1016/j.ecss.2006.04.012, 2006.
Goudeau, M.-L. S., Grauel, A.-L., Bernasconi, S. M., and de Lange, G. J.: Provenance of surface sediments along the southeastern Adriatic coast off Italy: an overview, Estuar. Coast. Shelf S., 134, 45–56, https://doi.org/10.1016/j.ecss.2013.09.009, 2013.
Gough, M. A. and Rowland, S. J.: Characterization of unresolved complex mixtures of hydrocarbons in petroleum, Nature, 344, 648–650, https://doi.org/10.1038/344648a0, 1990.
Grice, K., Klein Breteler, W., Schouten, S., Grossi, V., Leeuw, J. W., and Damsté, J. S. S.: Effects of zooplankton herbivory on biomarker proxy records, Paleoceanography, 13, 686–693, https://doi.org/10.1029/98PA01871, 1998.
Grimalt, J. O. and Albaigés, J.: Characterization of the depositional environments of the Ebro Delta (western Mediterranean) by the study of sedimentary lipid markers, Mar. Geol., 95, 207–224, https://doi.org/10.1016/0025-3227(90)90117-3, 1990.
Guerzoni, S. and Molinaroli, E.: Input of various chemicals transported by Saharan dust and depositing at the sea surface in the Mediterranean Sea, Environ. Chem., 5, 237–268, https://doi.org/10.1007/b107149, 2005.
Guerzoni, S., Chester, R., Dulac, F., Herut, B., Loÿe-Pilot, M.-D., Measures, C., Migon, C., Molinaroli, E., Moulin, C., Rossini, P., Saydam, C., Soudine, A., and Ziveri, P.: The role of atmospheric deposition in the biogeochemistry of the Mediterranean Sea, Prog. Oceanogr., 44, 147–190, https://doi.org/10.1016/S0079-6611(99)00024-5, 1999.
Hamann, Y., Ehrmann, W., Schmiedl, G., Krüger, S., Stuut, J.-B., and Kuhnt, T.: Sedimentation processes in the Eastern Mediterranean Sea during the Late Glacial and Holocene revealed by end-member modelling of the terrigenous fraction in marine sediments, Mar. Geol., 248, 97–114, https://doi.org/10.1016/j.margeo.2007.10.009, 2008.
Harmelin-Vivien, M., Loizeau, V., Mellon, C., and Beker, B.: Comparison of C and N stable isotope ratios between surface particulate organic matter and microphytoplankton in the Gulf of Lions (NW Mediterranean), Cont. Shelf Res., 28, 1911–1919, https://doi.org/10.1016/j.csr.2008.03.002, 2008.
Hedges, J. I. and Keil, R. G.: Sedimentary organic matter preservation: an assessment and speculative synthesis, Mar. Chem., 49, 81–115, https://doi.org/10.1016/0304-4203(95)00008-F, 1995.
Hedges, J. I. and Oades, J. M.: Comparative organic geochemistries of soils and marine sediments, Org. Geochem., 27, 319–361, https://doi.org/10.1016/S0146-6380(97)00056-9, 1997.
Hedges, J. I., Keil, R. G., and Benner, R.: What happens to terrestrial organic matter in the ocean?, Org. Geochem., 27, 195–212, https://doi.org/10.1016/S0146-6380(97)00066-1, 1997.
Heussner, S., Calafat, A., and Palanques, A.: Quantitative and qualitative features of particle fluxes in the North-Balearic Basin, in: EUROMARGE-NB Final Report, edited by: Canals, M., Casamor, J. L., Cacho, I., Calafat, A. M., Monaco, A., MAST II Program, EC, 2, 41–66, 1996.
Hopmans, E. C., Weijers, J. W.., Schefuß, E., Herfort, L., Sinninghe Damsté, J. S., and Schouten, S.: A novel proxy for terrestrial organic matter in sediments based on branched and isoprenoid tetraether lipids, Earth Planet. Sc. Lett., 224, 107–116, https://doi.org/10.1016/j.epsl.2004.05.012, 2004.
Hu, J., Peng, P., Jia, G., Mai, B., and Zhang, G.: Distribution and sources of organic carbon, nitrogen and their isotopes in sediments of the subtropical Pearl River estuary and adjacent shelf, Southern China, Mar. Chem., 98, 274–285, https://doi.org/10.1016/j.marchem.2005.03.008, 2006.
IOC, IHO and BODC: Centenary edition of the GEBCO digital atlas, published on CD-ROM on behalf of the Intergovernmental Oceanographic Commission and the International Hydrographic Organization as part of the General Bathymetric Chart of the Oceans, Liverpool, UK, 2003.
Jickells, T. D.: Atmospheric inputs of metals and nutrients to the oceans: their magnitude and effects, Mar. Chem., 48, 199–214, https://doi.org/10.1016/0304-4203(95)92784-P, 1995.
Jickells, T. D., An, Z. S., Andersen, K. K., Baker, A. R., Bergametti, G., Brooks, N., Cao, J. J., Boyd, P. W., Duce, R. A., Hunter, K. A., Kawahata, H., Kubilay, N., laRoche, J., Liss, P. S., Mahowald, N., Prospero, J. M., Ridgwell, A. J., Tegen, I., and Torres, R.: Global iron connections between desert dust, ocean biogeochemistry, and climate, Science, 308, 67–71, https://doi.org/10.1126/science.1105959, 2005.
Kaiser, J., Ruggieri, N., Hefter, J., Siegel, H., Mollenhauer, G., Arz, H. W., and Lamy, F.: Lipid biomarkers in surface sediments from the gulf of genoa, Ligurian sea (NW Mediterranean sea) and their potential for the reconstruction of palaeo-environments, Deep-Sea Res. Pt. I, 89, 68–83, https://doi.org/10.1016/j.dsr.2014.04.009, 2014.
Kelepertsis, A. E., Alexakis, D. E., Nastos, P. T., and Kanellopoulou, E. A.: The presence of volcanic ash in the western Greece and its association with the eruption of the Etna volcano, Italy, consequences on the environment, in: 8th International Conference on Environmantal Science and Technology, Lemnos Island, Greece, 408–415, 2003.
Kemp, A. E. S., Pearce, R. B., Koizumi, I., Pike, J., and Rance, S. J.: The role of mat-forming diatoms in the formation of Mediterranean sapropels, Nature, 398, 57–61, https://doi.org/10.1038/18001, 1999.
Kontoyiannis, H., Balopoulos, E., Gotsis-Skretas, O., Pavlidou, A., Assimakopoulou, G., and Papageorgiou, E.: The hydrology and biochemistry of the Cretan Straits (Antikithira and Kassos Straits) revisited in the period June 1997–May 1998, J. Marine Syst., 53, 37–57, https://doi.org/10.1016/j.jmarsys.2004.06.007, 2005.
Krom, M. D., Groom, S., and Zohary, T.: The Eastern Mediterranean, the Biogeo., edited by: Black, G. B. and Shimmield, K. D., Blackwell Publishing, Oxford, 91–122, 2003.
Krom, M. D., Woodward, E. M. S., Herut, B., Kress, N., Carbo, P., Mantoura, R. F. C., Spyres, G., Thingstad, T. F., Wassmann, P., Wexels-Riser, C., Kitidis, V., Law, C. S., and Zodiatis, G.: Nutrient cycling in the south east Levantine basin of the eastern Mediterranean: results from a phosphorus starved system, Deep-Sea Res. Pt. II, 52, 2879–2896, https://doi.org/10.1016/j.dsr2.2005.08.009, 2005.
Larnicol, G., Ayoub, N., and Le Traon, P. Y.: Major changes in Mediterranean Sea level variability from 7 years of TOPEX/Poseidon and ERS-1/2 data, J. Marine Syst., 33–34, 63–89, https://doi.org/10.1016/S0924-7963(02)00053-2, 2002.
Lascaratos, A., Williams, R. G., and Tragou, E.: A mixed-layer study of the formation of Levantine intermediate water, J. Geophys. Res., 98, 14739, https://doi.org/10.1029/93JC00912, 1993.
Lascaratos, A., Roether, W., Nittis, K., and Klein, B.: Recent changes in deep water formation and spreading in the eastern Mediterranean Sea: a review, Prog. Oceanogr., 44, 5–36, https://doi.org/10.1016/S0079-6611(99)00019-1, 1999.
Lutz, M., Dunbar, R., and Caldeira, K.: Regional variability in the vertical flux of particulate organic carbon in the ocean interior, Global Biogeochem. Cy., 16, 11-1–11-18, https://doi.org/10.1029/2000GB001383, 2002.
Malanotte-Rizzoli, P. and Hecht, A.: Large-scale properties of the eastern mediterranean-A review, Oceanol. Acta, 11(4), 323–335, 1988.
Malanotte-Rizzoli, P., Manca, B. B., Alcala, M. R. D., Bergamasco, A., Bregant, D., and Georgopoulos, D.: A synthesis of the Ionian Sea hydrography, circulation and water mass pathways during POEM-Phase I, Prog. Oceanogr., 39, 153–204, https://doi.org/10.1016/S0079-6611(97)00013-X, 1997.
Manca, B. B., Kovacević, V., Gacić, M., and Viezzoli, D.: Dense water formation in the Southern Adriatic Sea and spreading into the Ionian Sea in the period 1997–1999, J. Mar. Syst., 33–34, 133–154, https://doi.org/10.1016/S0924-7963(02)00056-8, 2002.
Marlowe, I. T., Green, J. C., Neal, A. C., Brassell, S. C., Eglinton, G., and Course, P. A.: Long chain (n-C37–C39) alkenones in the Prymnesiophyceae. Distribution of alkenones and other lipids and their taxonomic significance, Brit. Phycol. J., 19, 203–216, https://doi.org/10.1080/00071618400650221, 1984.
Masqué, P., Fabres, J., Canals, M., Sanchez-Cabeza, J. A., Sanchez-Vidal, A., Cacho, I., Calafat, A., and Bruach, J. M.: Accumulation rates of major constituents of hemipelagic sediments in the deep Alboran Sea: a centennial perspective of sedimentary dynamics, Mar. Geol., 193, 207–233, https://doi.org/10.1016/S0025-3227(02)00593-5, 2003.
Mayer, L. M.: Relationships between mineral surfaces and organic carbon concentrations in soils and sediments, Chem. Geol., 114, 347–363, https://doi.org/10.1016/0009-2541(94)90063-9, 1994.
Meador, T. B., Gogou, A., Spyres, G., Herndl, G. J., Krasakopoulou, E., Psarra, S., Yokokawa, T., De Corte, D., Zervakis, V., and Repeta, D. J.: Biogeochemical relationships between ultrafiltered dissolved organic matter and picoplankton activity in the Eastern Mediterranean Sea, Deep-Sea Res. Pt. II, 57, 1460–1477, https://doi.org/10.1016/j.dsr2.2010.02.015, 2010.
Medimap Group: Morpho-bathymetry of the Mediterranean Sea, E: 1=2 000 000, CIESM/Ifremer Sp. Publ., Maps and Atlases, two maps (Western Mediterranean and Eastern Mediterranean), Montecarlo/Brest, Monaco/France, 2007.
Meyers, P. A.: Preservation of elemental and isotopic source identification of sedimentary organic matter, Chem. Geol., 114, 289–302, https://doi.org/10.1016/0009-2541(94)90059-0, 1994.
Meyers, P. A.: Organic geochemical proxies of paleoceanographic, paleolimnologic, and paleoclimatic processes, Org. Geochem., 27, 213–250, https://doi.org/10.1016/S0146-6380(97)00049-1, 1997.
Meyers, P. A. and Arnaboldi, M.: Paleoceanographic implications of nitrogen and organic carbon isotopic excursions in mid-Pleistocene sapropels from the Tyrrhenian and Levantine Basins, Mediterranean Sea, Palaeogeogr. Palaeocl., 266, 112–118, https://doi.org/10.1016/j.palaeo.2008.03.018, 2008.
Meyers, P. A., Silliman, J. E., and Shaw, T. J.: Effects of turbidity flows on organic matter accumulation, sulfate reduction, and methane generation in deep-sea sediments on the Iberia Abyssal Plain, Org. Geochem., 25, 69–78, https://doi.org/10.1016/S0146-6380(96)00106-4, 1996.
Milliff, R. F. and Robinson, A. R.: Structure and dynamics of the Rhodes gyre system and dynamical interpolation for estimates of the mesoscale variability, J. Phys. Oceanogr., 22, 317–337, https://doi.org/10.1175/1520-0485(1992)022<0317:SADOTR>2.0.CO;2, 1992.
Millot, C. and Taupier-Letage, I.: Additional evidence of LIW entrainment across the Algerian subbasin by mesoscale eddies and not by a permanent westward flow, Prog. Oceanogr., 66, 231–250, https://doi.org/10.1016/j.pocean.2004.03.002, 2005.
Mortlock, R. A. and Froelich, P. N.: A simple method for the rapid determination of biogenic opal in pelagic marine sediments, Deep-Sea Res., 36, 1415–1426, https://doi.org/10.1016/0198-0149(89)90092-7, 1989.
Müller, P. J.: C/N ratios in Pacific deep-sea sediments: effect of inorganic ammonium and organic nitrogen compounds sorbed by clays, Geochim. Cosmochim. Ac., 41, 765–776, https://doi.org/10.1016/0016-7037(77)90047-3, 1977.
Nieuwenhuize, J., Maas, Y. E. M., and Middelburg, J. J.: Rapid analysis of organic carbon and nitrogen in particulate materials, Mar. Chem., 45, 217–224, https://doi.org/10.1016/0304-4203(94)90005-1, 1994.
Ohkouchi, N., Kawamura, K., Kawahata, H., and Taira, A.: Latitudinal distributions of terrestrial biomarkers in the sediments from the Central Pacific, Geochim. Cosmochim. Ac., 61, 1911–1918, https://doi.org/10.1016/S0016-7037(97)00040-9, 1997.
Olgun, N., Duggen, S., Andronico, D., Kutterolf, S., Croot, P. L., Giammanco, S., Censi, P., and Randazzo, L.: Possible impacts of volcanic ash emissions of Mount Etna on the primary productivity in the oligotrophic Mediterranean Sea: results from nutrient-release experiments in seawater, Mar. Chem., 152, 32–42, https://doi.org/10.1016/j.marchem.2013.04.004, 2013.
Orlic, M., Gacic, M., and Laviolette, P. E.: The currents and circulation of the Adriatic Sea, Oceanol. Acta, 15, 109–124, 1992.
Parinos, C., Gogou, A., Bouloubassi, I., Pedrosa-Pàmies, R., Hatzianestis, I., Sanchez-Vidal, A., Rousakis, G., Velaoras, D., Krokos, G., and Lykousis, V.: Occurrence, sources and transport pathways of natural and anthropogenic hydrocarbons in deep-sea sediments of the eastern Mediterranean Sea, Biogeosciences, 10, 6069–6089, https://doi.org/10.5194/bg-10-6069-2013, 2013.
Pedrosa-Pàmies, R., Sanchez-Vidal, A., Calafat, A., Canals, M., and Durán, R.: Impact of storm-induced remobilization on grain size distribution and organic carbon content in sediments from the Blanes Canyon area, NW Mediterranean Sea, Prog. Oceanogr., 118, 122–136, https://doi.org/10.1016/j.pocean.2013.07.023, 2013.
Perdue, E. M. and Koprivnjak, J.-F.: Using the C/N ratio to estimate terrigenous inputs of organic matter to aquatic environments, Estuar. Coast. Shelf S., 73, 65–72, https://doi.org/10.1016/j.ecss.2006.12.021, 2007.
Polymenakou, P. N., Tselepides, A., Stephanou, E. G., and Bertilsson, S.: Carbon speciation and composition of natural microbial communities in polluted and pristine sediments of the Eastern Mediterranean Sea, Mar. Pollut. Bull., 52, 1396–1405, https://doi.org/10.1016/j.marpolbul.2006.03.021, 2006.
Psarra, S., Tselepides, A., and Ignatiades, L.: Primary productivity in the oligotrophic Cretan Sea (NE Mediterranean): seasonal and interannual variability, Prog. Oceanogr., 46, 187–204, https://doi.org/10.1016/S0079-6611(00)00018-5, 2000.
Rabitti, S., Bianchi, F., Boldrin, A., Daros, L., Socal, G., and Totti, C.: Particulate matter and phytoplankton in the Ionian Sea, Oceanol. Acta, 17, 297–307, 1994.
Rampen, S. W., Willmott, V., Kim, J.-H., Uliana, E., Mollenhauer, G., Schefuß, E., Sinninghe Damsté, J. S., and Schouten, S.: Long chain 1,13- and 1,15-diols as a potential proxy for palaeotemperature reconstruction, Geochim. Cosmochim. Acta, 84, 204–216, https://doi.org/10.1016/j.gca.2012.01.024, 2012.
Ratmeyer, V., Balzer, W., Bergametti, G., Chiapello, I., Fischer, G., and Wyputta, U.: Seasonal impact of mineral dust on deep-ocean particle flux in the eastern subtropical Atlantic Ocean, Mar. Geol., 159, 241–252, https://doi.org/10.1016/S0025-3227(98)00197-2, 1999.
Redfield, A. C., Ketchum, B. H., and Richards, F. A.: The influence of organisms on the composition of sea-water, in: The Sea, edited by: Hill, M. N., Interscience, New York, 26–77, 1963.
Robinson, A. R., Malanotte-Rizzoli, P., Hecht, A., Michelato, A., Roether, W., Theocharis, A., Ünlüata, Ü., Pinardi, N., Artegiani, A., and Bergamasco, A.: General circulation of the Eastern Mediterranean, Earth-Sci. Rev., 32, 285–309, 1992.
Robinson, A. R., Leslie, W. G., Theocharis, A., and Lascaratos, A.: Mediterranean Sea circulation, in: Encyclopedia of Ocean Sciences, Academic Press, 1689–1706, 2001.
Roether, W. and Well, R.: Oxygen consumption in the Eastern Mediterranean, Deep-Sea Res. Pt. I, 48, 1535–1551, https://doi.org/10.1016/S0967-0637(00)00102-3, 2001.
Romero, I. C., Schwing, P. T., Brooks, G. R., Larson, R. A., Hastings, D. W., Ellis, G., Goddard, E. A., and Hollander, D. J.: Hydrocarbons in Deep-Sea Sediments following the 2010 Deepwater Horizon Blowout in the Northeast Gulf of Mexico, edited by: Chin, W.-C., PLoS One, 10, e0128371, https://doi.org/10.1371/journal.pone.0128371, 2015.
Roussiez, V., Ludwig, W., Monaco, A., Probst, J.-L., Bouloubassi, I., Buscail, R., and Saragoni, G.: Sources and sinks of sediment-bound contaminants in the Gulf of Lions (NW Mediterranean Sea): a multi-tracer approach, Cont. Shelf Res., 26, 1843–1857, https://doi.org/10.1016/j.csr.2006.04.010, 2006.
Rullkötter, J.: Organic matter: the driving force for early diagenesis, in Marine geochemistry, edited by: Schulz, H. D. and Zabel, M., Springer Berlin Heidelberg, 125–168, 2006.
Rumolo, P., Barra, M., Gherardi, S., Marsella, E., and Sprovieri, M.: Stable isotopes and C/N ratios in marine sediments as a tool for discriminating anthropogenic impact., J. Environ. Monitor., 13, 3399–408, https://doi.org/10.1039/c1em10568j, 2011.
Rutten, A., de Lange, G.., Ziveri, P., Thomson, J., Van Santvoort, P. J. M., Colley, S., and Corselli, C.: Recent terrestrial and carbonate fluxes in the pelagic eastern Mediterranean; a comparison between sediment trap and surface sediment, Palaeogeogr. Palaeocl., 158, 197–213, https://doi.org/10.1016/S0031-0182(00)00050-X, 2000.
Salihoğlu, \.I., Saydam, C., Baştürk, Ö., Yilmaz, K., Göçmen, D., Hatipoglu, E., and Yilmaz, A.: Transport and distribution of nutrients and chlorophyll a by mesoscale eddies in the northeastern Mediterranean, Mar. Chem., 29, 375–390, https://doi.org/10.1016/0304-4203(90)90024-7, 1990.
Sanchez-Vidal, A., Pasqual, C., Kerhervé, P., Calafat, A., Heussner, S., Palanques, a., Durrieu de Madron, X., Canals, M., and Puig, P.: Impact of dense shelf water cascading on the transfer of organic matter to the deep western Mediterranean basin, Geophys. Res. Lett., 35, L05605, https://doi.org/10.1029/2007GL032825, 2008.
Schlitzer, R.: Ocean Data View, available at: http://odv.awi.de, 2011.
Schlitzer, R., Roether, W., Oster, H., Junghans, H.-G., Hausmann, M., Johannsen, H., and Michelato, A.: Chlorofluoromethane and oxygen in the Eastern Mediterranean, Deep-Sea Res., 38, 1531–1551, https://doi.org/10.1016/0198-0149(91)90088-W, 1991.
Seiter, K., Hensen, C., Schröter, J., and Zabel, M.: Organic carbon content in surface sediments – defining regional provinces, Deep-Sea Res. Pt. I, 51, 2001–2026, https://doi.org/10.1016/j.dsr.2004.06.014, 2004.
Selvaraj, K., Lee, T. Y., Yang, J. Y. T., Canuel, E. A., Huang, J. C., Dai, M., Liu, J. T., and Kao, S. J.: Stable isotopic and biomarker evidence of terrigenous organic matter export to the deep sea during tropical storms, Mar. Geol., 364, 32–42, https://doi.org/10.1016/j.margeo.2015.03.005, 2015.
Siokou-Frangou, I., Gotsis-Skretas, O., Christou, E. D., and Pagou, K.: Plankton characteristics in the Aegean, Ionian and NW Levantine Seas, in: The Eastern Mediterranean as a Laboratory Basin for the Assessment of Contrasting Ecosystems, edited by: Malanotte-Rizzoli, P. and Eremeev, V. N., Kluwer Academic Publisher, Dordrecht Boston London, 465–473, 1999.
Skonieczny, C., Bory, A., Bout-Roumazeilles, V., Abouchami, W., Galer, S. J. G., Crosta, X., Diallo, A., and Ndiaye, T.: A three-year time series of mineral dust deposits on the West African margin: sedimentological and geochemical signatures and implications for interpretation of marine paleo-dust records, Earth Planet. Sc. Lett., 364, 145–156, https://doi.org/10.1016/j.epsl.2012.12.039, 2013.
Statham, P. J. and Hart, V.: Dissolved iron in the Cretan Sea (eastern Mediterranean), Limnol. Oceanogr., 50, 1142–1148, https://doi.org/10.4319/lo.2005.50.4.1142, 2005.
Stavrakakis, S., Chronis, G., Tselepides, A., Heussner, S., Monaco, A., and Abassi, A.: Downward fluxes of settling particles in the deep Cretan Sea (NE Mediterranean), Prog. Oceanogr., 46, 217–240, https://doi.org/10.1016/S0079-6611(00)00020-3, 2000.
Stavrakakis, S., Gogou, A., Krasakopoulou, E., Karageorgis, A. P., Kontoyiannis, H., Rousakis, G., Velaoras, D., Perivoliotis, L., Kambouri, G., Stavrakaki, I., and Lykousis, V.: Downward fluxes of sinking particulate matter in the deep Ionian Sea (NESTOR site), eastern Mediterranean: seasonal and interannual variability, Biogeosciences, 10, 7235–7254, https://doi.org/10.5194/bg-10-7235-2013, 2013.
Struck, U., Emeis, K.-C., Voß, M., Krom, M. D., and Rau, G. H.: Biological productivity during sapropel S5 formation in the Eastern Mediterranean Sea: evidence from stable isotopes of nitrogen and carbon, Geochim. Cosmochim. Ac., 65, 3249–3266, https://doi.org/10.1016/S0016-7037(01)00668-8, 2001.
Taupier-Letage, I.: On the use of thermal images for circulation studies: applications to the Eastern Mediterranean basin, in: Remote Sensing of the European Seas, edited by: Barale, V. and Gade, M., Springer Netherlands, 153–164, 2008.
Tesi, T., Miserocchi, S., Goñi, M. A., Langone, L., Boldrin, A., and Turchetto, M.: Organic matter origin and distribution in suspended particulate materials and surficial sediments from the western Adriatic Sea (Italy), Estuar. Coast. Shelf Sci., 73, 431–446, https://doi.org/10.1016/j.ecss.2007.02.008, 2007a.
Tesi, T., Miserocchi, S., Goñi, M. A., and Langone, L.: Source, transport and fate of terrestrial organic carbon on the western Mediterranean Sea, Gulf of Lions, France, Mar. Chem., 105, 101–117, https://doi.org/10.1016/j.marchem.2007.01.005, 2007b.
Tesi, T., Langone, L., Goñi, M. A., Turchetto, M., Miserocchi, S., and Boldrin, A.: Source and composition of organic matter in the Bari canyon (Italy): Dense water cascading versus particulate export from the upper ocean, Deep Sea Res. Pt. I, 55, 813–831, https://doi.org/10.1016/j.dsr.2008.03.007, 2008.
Theocharis, A., Georgopoulos, D., Lascaratos, A., and Nittis, K.: Water masses and circulation in the central region of the Eastern Mediterranean: Eastern Ionian, South Aegean and Northwest Levantine, 1986–1987, Deep-Sea Res. Pt. II, 40, 1121–1142, 1993.
Theocharis, A., Balopoulos, E., Kioroglou, S., Kontoyiannis, H., and Iona, A.: A synthesis of the circulation and hydrography of the South Aegean Sea and the Straits of the Cretan Arc (March 1994–January 1995), Prog. Oceanogr., 44, 469–509, https://doi.org/10.1016/S0079-6611(99)00041-5, 1999.
Theodosi, C., Parinos, C., Gogou, A., Kokotos, A., Stavrakakis, S., Lykousis, V., Hatzianestis, J., and Mihalopoulos, N.: Downward fluxes of elemental carbon, metals and polycyclic aromatic hydrocarbons in settling particles from the deep Ionian Sea (NESTOR site), Eastern Mediterranean, Biogeosciences, 10, 4449–4464, https://doi.org/10.5194/bg-10-4449-2013, 2013.
Thingstad, T. F., Krom, M. D., Mantoura, R. F. C., Flaten, G. A. F., Groom, S., Herut, B., Kress, N., Law, C. S., Pasternak, A., Pitta, P., Psarra, S., Rassoulzadegan, F., Tanaka, T., Tselepides, A., Wassmann, P., Woodward, E. M. S., Riser, C. W., Zodiatis, G., and Zohary, T.: Nature of phosphorus limitation in the ultraoligotrophic eastern Mediterranean, Science, 309, 1068–1071, https://doi.org/10.1126/science.1112632, 2005.
Triantaphyllou, M. V.: Coccolithophore export production and response to seasonal surface water variability in the oligotrophic Cretan Sea (NE Mediterranean), Micropaleontology, 50(Suppl_1), 127–144, https://doi.org/10.2113/50.Suppl_1.127, 2004.
Tsapakis, M. and Stephanou, E. G.: Occurrence of gaseous and particulate polycyclic aromatic hydrocarbons in the urban atmosphere: study of sources and ambient temperature effect on the gas/particle concentration and distribution, Environ. Pollut., 133, 147–156, https://doi.org/10.1016/j.envpol.2004.05.012, 2005.
Turchetto, M., Boldrin, A., Langone, L., Miserocchi, S., Tesi, T., and Foglini, F.: Particle transport in the Bari Canyon (southern Adriatic Sea), Mar. Geol., 246, 231–247, https://doi.org/10.1016/j.margeo.2007.02.007, 2007.
UNEP/MAP/MEDPOL: Sub-Regional Assessment of the Status of Marine and Coastal Ecosystems and of Pressures to the Marine and Coastal Environment Eastern Mediterranean Sea UNEP(DEPI)/MEDWG.350/Inf.4, Barcelona, 37–38, 2010.
Ursella, L., Kovačević, V., and Gačić, M.: Tidal variability of the motion in the Strait of Otranto, Ocean Sci., 10, 49–67, https://doi.org/10.5194/os-10-49-2014, 2014.
Van Santvoort, P. J. M., de Lange, G. J., Thomson, J., Cussen, H., Wilson, T. R. S., Krom, M. D., and Ströhle, K.: Active post-depositional oxidation of the most recent sapropel (S1) in sediments of the eastern Mediterranean Sea, Geochim. Cosmochim. Ac., 60, 4007–4024, https://doi.org/10.1016/S0016-7037(96)00253-0, 1996.
Van Santvoort, P. J. M., De Lange, G. J., Thomson, J., Colley, S., Meysman, F. J. R., and Slomp, C. P.: Oxidation and origin of organic matter in surficial eastern Mediterranean hemipelagic sediments, Aquat. Geochem., 8, 153–175, 2002.
Volkman, J. K.: A review of sterol markers for marine and terrigenous organic matter, Org. Geochem., 9, 83–99, https://doi.org/10.1016/0146-6380(86)90089-6, 1986.
Volkman, J. K.: Lipid markers for marine organic matter, in: Marine Organic Matter: Biomarkers, Isotopes and DNA, edited by: Volkman, J. K., Springer Verlag, Berlin, 27–70, 2006.
Volkman, J. K., Kearney, P., and Jeffrey, S. W.: A new source of 4-methyl sterols and 5α (H)-stanols in sediments: prymnesiophyte microalgae of the genus Pavlova, Org. Geochem., 15, 489–497, https://doi.org/10.1016/0146-6380(90)90094-G, 1990.
Volkman, J. K., Barrett, S. M., and Blackburn, S. I.: Eustigmatophyte microalgae are potential sources of C29 sterols, C22–C28 n-alcohols and C28–C32 n-alkyl diols in freshwater environments, Org. Geochem., 30, 307–318, https://doi.org/10.1016/S0146-6380(99)00009-1, 1999.
Wang, Z., Fingas, M., and Page, D. S.: Oil spill identification, J. Chromatogr. A, 843, 369–411, https://doi.org/10.1016/S0021-9673(99)00120-X, 1999.
Weldeab, S., Emeis, K.-C., Hemleben, C., and Siebel, W.: Provenance of lithogenic surface sediments and pathways of riverine suspended matter in the Eastern Mediterranean Sea: evidence from 143Nd/144Nd and 87Sr/86Sr ratios, Chem. Geol., 186, 139–149, https://doi.org/10.1016/S0009-2541(01)00415-6, 2002.
Ziveri, P., Rutten, A., de Lange, G.., Thomson, J., and Corselli, C.: Present-day coccolith fluxes recorded in central eastern Mediterranean sediment traps and surface sediments, Palaeogeogr. Palaeocl., 158, 175–195, https://doi.org/10.1016/S0031-0182(00)00049-3, 2000.
Zoccolotti, L. and Salusti, E.: Observations of a vein of very dense marine water in the southern Adriatic Sea, Cont. Shelf Res., 7, 535–551, https://doi.org/10.1016/0278-4343(87)90020-3, 1987.
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A multi-proxy approach is applied in surface sediments collected from deep slopes and basins (1018-4087 m depth) of the oligotrophic eastern Mediterranean Sea. This study sheds new light on the sources and transport mechanisms along with the impact of preservation vs. diagenetic processes on the composition of sedimentary organic matter in the deep basins of the oligotrophic eastern Mediterranean Sea.
A multi-proxy approach is applied in surface sediments collected from deep slopes and basins...
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