Articles | Volume 10, issue 3
https://doi.org/10.5194/bg-10-1451-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-10-1451-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
04 Mar 2013
Research article |
| 04 Mar 2013
Seasonal patterns in Arctic planktonic metabolism (Fram Strait – Svalbard region)
R. Vaquer-Sunyer
Department of Geology, Lund University, Sölvegatan 12, 22362 Lund, Sweden
C. M. Duarte
Department of Global Change Research. IMEDEA (CSIC-UIB) Institut Mediterani d'Estudis Avançats, C/ Miguel Marqués 21, 07190 Esporles (Mallorca), Spain
The UWA Oceans Institute and School of Plant Biology, University of Western Australia, 35 Stirling Highway, Crawle, Australia
J. Holding
Department of Global Change Research. IMEDEA (CSIC-UIB) Institut Mediterani d'Estudis Avançats, C/ Miguel Marqués 21, 07190 Esporles (Mallorca), Spain
A. Regaudie-de-Gioux
Department of Global Change Research. IMEDEA (CSIC-UIB) Institut Mediterani d'Estudis Avançats, C/ Miguel Marqués 21, 07190 Esporles (Mallorca), Spain
L. S. García-Corral
Department of Global Change Research. IMEDEA (CSIC-UIB) Institut Mediterani d'Estudis Avançats, C/ Miguel Marqués 21, 07190 Esporles (Mallorca), Spain
M. Reigstad
Faculty of Biosciences, Fisheries and Economics, University of Tromsø, 9037 Tromsø, Norway
P. Wassmann
Faculty of Biosciences, Fisheries and Economics, University of Tromsø, 9037 Tromsø, Norway
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Aisling Fontanini, Alexandra Steckbauer, Sam Dupont, and Carlos M. Duarte
Biogeosciences, 15, 3717–3729, https://doi.org/10.5194/bg-15-3717-2018, https://doi.org/10.5194/bg-15-3717-2018, 2018
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Francesca Iuculano, Carlos Maria Duarte, Núria Marbà, and Susana Agustí
Biogeosciences, 14, 5069–5075, https://doi.org/10.5194/bg-14-5069-2017, https://doi.org/10.5194/bg-14-5069-2017, 2017
Carlos M. Duarte
Biogeosciences, 14, 301–310, https://doi.org/10.5194/bg-14-301-2017, https://doi.org/10.5194/bg-14-301-2017, 2017
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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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Raquel Vaquer-Sunyer, Heather E. Reader, Saraladevi Muthusamy, Markus V. Lindh, Jarone Pinhassi, Daniel J. Conley, and Emma S. Kritzberg
Biogeosciences, 13, 4751–4765, https://doi.org/10.5194/bg-13-4751-2016, https://doi.org/10.5194/bg-13-4751-2016, 2016
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Oscar Serrano, Aurora M. Ricart, Paul S. Lavery, Miguel Angel Mateo, Ariane Arias-Ortiz, Pere Masque, Mohammad Rozaimi, Andy Steven, and Carlos M. Duarte
Biogeosciences, 13, 4581–4594, https://doi.org/10.5194/bg-13-4581-2016, https://doi.org/10.5194/bg-13-4581-2016, 2016
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D. Krause-Jensen, C. M. Duarte, I. E. Hendriks, L. Meire, M. E. Blicher, N. Marbà, and M. K. Sejr
Biogeosciences, 12, 4895–4911, https://doi.org/10.5194/bg-12-4895-2015, https://doi.org/10.5194/bg-12-4895-2015, 2015
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A. Regaudie-de-Gioux, S. Sal, and Á. López-Urrutia
Biogeosciences, 12, 1915–1923, https://doi.org/10.5194/bg-12-1915-2015, https://doi.org/10.5194/bg-12-1915-2015, 2015
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L. S. García-Corral, E. Barber, A. Regaudie-de-Gioux, S. Sal, J. M. Holding, S. Agustí, N. Navarro, P. Serret, P. Mozetič, and C. M. Duarte
Biogeosciences, 11, 4529–4540, https://doi.org/10.5194/bg-11-4529-2014, https://doi.org/10.5194/bg-11-4529-2014, 2014
I. E. Hendriks, Y. S. Olsen, L. Ramajo, L. Basso, A. Steckbauer, T. S. Moore, J. Howard, and C. M. Duarte
Biogeosciences, 11, 333–346, https://doi.org/10.5194/bg-11-333-2014, https://doi.org/10.5194/bg-11-333-2014, 2014
S. Lasternas, M. Piedeleu, P. Sangrà, C. M. Duarte, and S. Agustí
Biogeosciences, 10, 2129–2143, https://doi.org/10.5194/bg-10-2129-2013, https://doi.org/10.5194/bg-10-2129-2013, 2013
M. Alcaraz, R. Almeda, E. Saiz, A. Calbet, C. M. Duarte, S. Agustí, R. Santiago, and A. Alonso
Biogeosciences, 10, 689–697, https://doi.org/10.5194/bg-10-689-2013, https://doi.org/10.5194/bg-10-689-2013, 2013
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Controls on the relative abundances and rates of nitrifying microorganisms in the ocean
Alexandre Accardo, Rémi Laxenaire, Alberto Baudena, Sabrina Speich, Rainer Kiko, and Lars Stemmann
Biogeosciences, 22, 1183–1201, https://doi.org/10.5194/bg-22-1183-2025, https://doi.org/10.5194/bg-22-1183-2025, 2025
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The open ocean helps mitigate climate change by storing CO2 via the biological carbon pump (BCP), which involves processes like organic carbon production at the surface and transferring it to the deep ocean via various pathways. By deploying an autonomous platform, we found significant marine snow accumulation from the surface to the mesopelagic zone in frontal regions between eddies. We suggest that the coupling of hydrodynamics at eddy edges and biological activity may enhance this process.
Naoya Kanna, Kazutaka Tateyama, Takuji Waseda, Anna Timofeeva, Maria Papadimitraki, Laura Whitmore, Hajime Obata, Daiki Nomura, Hiroshi Ogawa, Youhei Yamashita, and Igor Polyakov
Biogeosciences, 22, 1057–1076, https://doi.org/10.5194/bg-22-1057-2025, https://doi.org/10.5194/bg-22-1057-2025, 2025
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This article presents data on iron and manganese, essential micronutrients for primary producers in the Arctic Laptev and East Siberian seas (LESS). There, observations were made through international cooperation with the Nansen and Amundsen Basin Observational System expedition during the late summer of 2021. The results from this study indicate that the major sources controlling the iron and manganese distributions on the LESS continental margins are river discharge and shelf sediment input.
Ben J. Fisher, Alex J. Poulton, Michael P. Meredith, Kimberlee Baldry, Oscar Schofield, and Sian F. Henley
Biogeosciences, 22, 975–994, https://doi.org/10.5194/bg-22-975-2025, https://doi.org/10.5194/bg-22-975-2025, 2025
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The Southern Ocean is a rapidly warming environment, with subsequent impacts on ecosystems and biogeochemical cycling. This study examines changes in phytoplankton and biogeochemistry using a range of climate models. Under climate change, the Southern Ocean will be warmer, more acidic and more productive and will have reduced nutrient availability by 2100. However, there is substantial variability between models across key productivity parameters. We propose ways of reducing this uncertainty.
David Curbelo-Hernández, Fiz F. Pérez, Melchor González-Dávila, Sergey V. Gladyshev, Aridane G. González, David González-Santana, Antón Velo, Alexey Sokov, and J. Magdalena Santana-Casiano
Biogeosciences, 21, 5561–5589, https://doi.org/10.5194/bg-21-5561-2024, https://doi.org/10.5194/bg-21-5561-2024, 2024
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The study evaluated CO2–carbonate system dynamics in the North Atlantic subpolar gyre during 2009–2019. Significant ocean acidification, largely due to rising anthropogenic CO2 levels, was found. Cooling, freshening, and enhanced convective processes intensified this trend, affecting calcite and aragonite saturation. The findings contribute to a deeper understanding of ocean acidification and improve our knowledge about its impact on marine ecosystems.
Medhavi Pandey, Haimanti Biswas, Daniel Birgel, Nicole Burdanowitz, and Birgit Gaye
Biogeosciences, 21, 4681–4698, https://doi.org/10.5194/bg-21-4681-2024, https://doi.org/10.5194/bg-21-4681-2024, 2024
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We analysed sea surface temperature (SST) proxy and plankton biomarkers in sediments that accumulate sinking material signatures from surface waters in the central Arabian Sea (21°–11° N, 64° E), a tropical basin impacted by monsoons. We saw a north–south SST gradient, and the biological proxies showed more organic matter from larger algae in the north. Smaller algae and zooplankton were more numerous in the south. These trends were related to ocean–atmospheric processes and oxygen availability.
Allison Hogikyan and Laure Resplandy
Biogeosciences, 21, 4621–4636, https://doi.org/10.5194/bg-21-4621-2024, https://doi.org/10.5194/bg-21-4621-2024, 2024
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Rising atmospheric CO2 influences ocean carbon chemistry, leading to ocean acidification. Global warming introduces spatial patterns in the intensity of ocean acidification. We show that the most prominent spatial patterns are controlled by warming-driven changes in rainfall and evaporation, not by the direct effect of warming on carbon chemistry and pH. These evaporation and rainfall patterns oppose acidification in saltier parts of the ocean and enhance acidification in fresher regions.
Huailin Deng, Koji Suzuki, Ichiro Yasuda, Hiroshi Ogawa, and Jun Nishioka
EGUsphere, https://doi.org/10.5194/egusphere-2024-3064, https://doi.org/10.5194/egusphere-2024-3064, 2024
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Iron (Fe) and nitrate are vital for primary production in the North Pacific. Sedimentary Fe is carried by North Pacific Intermediate Water to the north Pacific, but the nutrient return path and its effect on phytoplankton are unclear. By combining Fe and macronutrient fluxes with phytoplankton composition, this study firstly revealed that Fe supply from subsurface greatly controls diatom abundance and identified the nutrient return path in the subarctic gyre and Kuroshio-Oyashio Transition Area.
Shunya Koseki, Lander R. Crespo, Jerry Tjiputra, Filippa Fransner, Noel S. Keenlyside, and David Rivas
Biogeosciences, 21, 4149–4168, https://doi.org/10.5194/bg-21-4149-2024, https://doi.org/10.5194/bg-21-4149-2024, 2024
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We investigated how the physical biases of an Earth system model influence the marine biogeochemical processes in the tropical Atlantic. With four different configurations of the model, we have shown that the versions with better SST reproduction tend to better represent the primary production and air–sea CO2 flux in terms of climatology, seasonal cycle, and response to climate variability.
Lyuba Novi, Annalisa Bracco, Takamitsu Ito, and Yohei Takano
Biogeosciences, 21, 3985–4005, https://doi.org/10.5194/bg-21-3985-2024, https://doi.org/10.5194/bg-21-3985-2024, 2024
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We explored the relationship between oxygen and stratification in the North Pacific Ocean using a combination of data mining and machine learning. We used isopycnic potential vorticity (IPV) as an indicator to quantify ocean ventilation and analyzed its predictability, a strong O2–IPV connection, and predictability for IPV in the tropical Pacific. This opens new routes for monitoring ocean O2 through few observational sites co-located with more abundant IPV measurements in the tropical Pacific.
Winfred Marshal, Jing Xiang Chung, Nur Hidayah Roseli, Roswati Md Amin, and Mohd Fadzil Bin Mohd Akhir
Biogeosciences, 21, 4007–4035, https://doi.org/10.5194/bg-21-4007-2024, https://doi.org/10.5194/bg-21-4007-2024, 2024
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This study stands out for thoroughly examining CMIP6 ESMs' ability to simulate biogeochemical variables in the southern South China Sea, an economically important region. It assesses variables like chlorophyll, phytoplankton, nitrate, and oxygen on annual and seasonal scales. While global assessments exist, this study addresses a gap by objectively ranking 13 CMIP6 ocean biogeochemistry models' performance at a regional level, focusing on replicating specific observed biogeochemical variables.
Jens Terhaar
Biogeosciences, 21, 3903–3926, https://doi.org/10.5194/bg-21-3903-2024, https://doi.org/10.5194/bg-21-3903-2024, 2024
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Despite the ocean’s importance in the carbon cycle and hence the climate, observing the ocean carbon sink remains challenging. Here, I use an ensemble of 12 models to understand drivers of decadal trends of the past, present, and future ocean carbon sink. I show that 80 % of the decadal trends in the multi-model mean ocean carbon sink can be explained by changes in decadal trends in atmospheric CO2. The remaining 20 % are due to internal climate variability and ocean heat uptake.
Reiner Steinfeldt, Monika Rhein, and Dagmar Kieke
Biogeosciences, 21, 3839–3867, https://doi.org/10.5194/bg-21-3839-2024, https://doi.org/10.5194/bg-21-3839-2024, 2024
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We calculate the amount of anthropogenic carbon (Cant) in the Atlantic for the years 1990, 2000, 2010 and 2020. Cant is the carbon that is taken up by the ocean as a result of humanmade CO2 emissions. To determine the amount of Cant, we apply a technique that is based on the observations of other humanmade gases (e.g., chlorofluorocarbons). Regionally, changes in ocean ventilation have an impact on the storage of Cant. Overall, the increase in Cant is driven by the rising CO2 in the atmosphere.
Stephanie Delacroix, Tor Jensen Nystuen, August E. Dessen Tobiesen, Andrew L. King, and Erik Höglund
Biogeosciences, 21, 3677–3690, https://doi.org/10.5194/bg-21-3677-2024, https://doi.org/10.5194/bg-21-3677-2024, 2024
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The addition of alkaline minerals into the ocean might reduce excessive anthropogenic CO2 emissions. Magnesium hydroxide can be added in large amounts because of its low seawater solubility without reaching harmful pH levels. The toxicity effect results of magnesium hydroxide, by simulating the expected concentrations from a ship's dispersion scenario, demonstrated low impacts on both sensitive and local assemblages of marine microalgae when compared to calcium hydroxide.
Madhavan Girijakumari Keerthi, Olivier Aumont, Lester Kwiatkowski, and Marina Levy
EGUsphere, https://doi.org/10.5194/egusphere-2024-2294, https://doi.org/10.5194/egusphere-2024-2294, 2024
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Our study assesses the capability of CMIP6 models to reproduce satellite observations of sub-seasonal chlorophyll variability. Models struggle to reproduce the sub-seasonal variance and its contribution across timescales. Some models overestimate sub-seasonal variance and exaggerate its role in annual fluctuations, while others underestimate it. Underestimation is likely due to the coarse resolution of models, while overestimation may result from intrinsic oscillations in biogeochemical models.
Precious Mongwe, Matthew Long, Takamitsu Ito, Curtis Deutsch, and Yeray Santana-Falcón
Biogeosciences, 21, 3477–3490, https://doi.org/10.5194/bg-21-3477-2024, https://doi.org/10.5194/bg-21-3477-2024, 2024
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We use a collection of measurements that capture the physiological sensitivity of organisms to temperature and oxygen and a CESM1 large ensemble to investigate how natural climate variations and climate warming will impact the ability of marine heterotrophic marine organisms to support habitats in the future. We find that warming and dissolved oxygen loss over the next several decades will reduce the volume of ocean habitats and will increase organisms' vulnerability to extremes.
Charly A. Moras, Tyler Cyronak, Lennart T. Bach, Renaud Joannes-Boyau, and Kai G. Schulz
Biogeosciences, 21, 3463–3475, https://doi.org/10.5194/bg-21-3463-2024, https://doi.org/10.5194/bg-21-3463-2024, 2024
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We investigate the effects of mineral grain size and seawater salinity on magnesium hydroxide dissolution and calcium carbonate precipitation kinetics for ocean alkalinity enhancement. Salinity did not affect the dissolution, but calcium carbonate formed earlier at lower salinities due to the lower magnesium and dissolved organic carbon concentrations. Smaller grain sizes dissolved faster but calcium carbonate precipitated earlier, suggesting that medium grain sizes are optimal for kinetics.
Jens Terhaar
EGUsphere, https://doi.org/10.5194/egusphere-2024-2171, https://doi.org/10.5194/egusphere-2024-2171, 2024
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The ocean is a major natural carbon sink. Despite its importance, estimates of the ocean carbon sink remain uncertain. Here, I present a hybrid model estimate of the ocean carbon sink from 1959 to 2022. By combining ocean models in hindcast mode and Earth System Models, I keep the strength of each approach and remove the respective weaknesses. This hybrid model estimate is similar in magnitude than the best estimate of the Global Carbon Budget but 70 % less uncertain.
Alain Fumenia, Hubert Loisel, Rick Allen Reynolds, and Dariusz Stramski
EGUsphere, https://doi.org/10.5194/egusphere-2024-2218, https://doi.org/10.5194/egusphere-2024-2218, 2024
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Particulate organic nitrogen (PON) in the ocean refers to nitrogen contained in particles suspended such as phytoplankton, zooplankton, bacteria, viruses, and organic detritus. We used field measurements to determine relationships between PON and inherent optical properties of seawater across a broad range of marine environments. The presented relationships are expected to have application in the assessment of PON distribution and variations from in situ and satellite optical observations
Rosie M. Sheward, Christina Gebühr, Jörg Bollmann, and Jens O. Herrle
Biogeosciences, 21, 3121–3141, https://doi.org/10.5194/bg-21-3121-2024, https://doi.org/10.5194/bg-21-3121-2024, 2024
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How quickly do marine microorganisms respond to salinity stress? Our experiments with the calcifying marine plankton Emiliania huxleyi show that growth and cell morphology responded to salinity stress within as little as 24–48 hours, demonstrating that morphology and calcification are sensitive to salinity over a range of timescales. Our results have implications for understanding the short-term role of E. huxleyi in biogeochemical cycles and in size-based paleoproxies for salinity.
Laura Marín-Samper, Javier Arístegui, Nauzet Hernández-Hernández, Joaquín Ortiz, Stephen D. Archer, Andrea Ludwig, and Ulf Riebesell
Biogeosciences, 21, 2859–2876, https://doi.org/10.5194/bg-21-2859-2024, https://doi.org/10.5194/bg-21-2859-2024, 2024
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Our planet is facing a climate crisis. Scientists are working on innovative solutions that will aid in capturing the hard to abate emissions before it is too late. Exciting research reveals that ocean alkalinity enhancement, a key climate change mitigation strategy, does not harm phytoplankton, the cornerstone of marine ecosystems. Through meticulous study, we may have uncovered a positive relationship: up to a specific limit, enhancing ocean alkalinity boosts photosynthesis by certain species.
France Van Wambeke, Pascal Conan, Mireille Pujo-Pay, Vincent Taillandier, Olivier Crispi, Alexandra Pavlidou, Sandra Nunige, Morgane Didry, Christophe Salmeron, and Elvira Pulido-Villena
Biogeosciences, 21, 2621–2640, https://doi.org/10.5194/bg-21-2621-2024, https://doi.org/10.5194/bg-21-2621-2024, 2024
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Phosphomonoesterase (PME) and phosphodiesterase (PDE) activities over the epipelagic zone are described in the eastern Mediterranean Sea in winter and autumn. The types of concentration kinetics obtained for PDE (saturation at 50 µM, high Km, high turnover times) compared to those of PME (saturation at 1 µM, low Km, low turnover times) are discussed in regard to the possible inequal distribution of PDE and PME in the size continuum of organic material and accessibility to phosphodiesters.
Jenny Hieronymus, Magnus Hieronymus, Matthias Gröger, Jörg Schwinger, Raffaele Bernadello, Etienne Tourigny, Valentina Sicardi, Itzel Ruvalcaba Baroni, and Klaus Wyser
Biogeosciences, 21, 2189–2206, https://doi.org/10.5194/bg-21-2189-2024, https://doi.org/10.5194/bg-21-2189-2024, 2024
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The timing of the net primary production annual maxima in the North Atlantic in the period 1750–2100 is investigated using two Earth system models and the high-emissions scenario SSP5-8.5. It is found that, for most of the region, the annual maxima occur progressively earlier, with the most change occurring after the year 2000. Shifts in the seasonality of the primary production may impact the entire ecosystem, which highlights the need for long-term monitoring campaigns in this area.
Nicole M. Travis, Colette L. Kelly, and Karen L. Casciotti
Biogeosciences, 21, 1985–2004, https://doi.org/10.5194/bg-21-1985-2024, https://doi.org/10.5194/bg-21-1985-2024, 2024
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We conducted experimental manipulations of light level on microbial communities from the primary nitrite maximum. Overall, while individual microbial processes have different directions and magnitudes in their response to increasing light, the net community response is a decline in nitrite production with increasing light. We conclude that while increased light may decrease net nitrite production, high-light conditions alone do not exclude nitrification from occurring in the surface ocean.
Zoë Rebecca van Kemenade, Zeynep Erdem, Ellen Christine Hopmans, Jaap Smede Sinninghe Damsté, and Darci Rush
Biogeosciences, 21, 1517–1532, https://doi.org/10.5194/bg-21-1517-2024, https://doi.org/10.5194/bg-21-1517-2024, 2024
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The California Current system (CCS) hosts the eastern subtropical North Pacific oxygen minimum zone (ESTNP OMZ). This study shows anaerobic ammonium oxidizing (anammox) bacteria cause a loss of bioavailable nitrogen (N) in the ESTNP OMZ throughout the late Quaternary. Anammox occurred during both glacial and interglacial periods and was driven by the supply of organic matter and changes in ocean currents. These findings may have important consequences for biogeochemical models of the CCS.
Cathy Wimart-Rousseau, Tobias Steinhoff, Birgit Klein, Henry Bittig, and Arne Körtzinger
Biogeosciences, 21, 1191–1211, https://doi.org/10.5194/bg-21-1191-2024, https://doi.org/10.5194/bg-21-1191-2024, 2024
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The marine CO2 system can be measured independently and continuously by BGC-Argo floats since numerous pH sensors have been developed to suit these autonomous measurements platforms. By applying the Argo correction routines to float pH data acquired in the subpolar North Atlantic Ocean, we report the uncertainty and lack of objective criteria associated with the choice of the reference method as well the reference depth for the pH correction.
Sabine Mecking and Kyla Drushka
Biogeosciences, 21, 1117–1133, https://doi.org/10.5194/bg-21-1117-2024, https://doi.org/10.5194/bg-21-1117-2024, 2024
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This study investigates whether northeastern North Pacific oxygen changes may be caused by surface density changes in the northwest as water moves along density horizons from the surface into the subsurface ocean. A correlation is found with a lag that about matches the travel time of water from the northwest to the northeast. Salinity is the main driver causing decadal changes in surface density, whereas salinity and temperature contribute about equally to long-term declining density trends.
Allanah Joy Paul, Mathias Haunost, Silvan Urs Goldenberg, Jens Hartmann, Nicolás Sánchez, Julieta Schneider, Niels Suitner, and Ulf Riebesell
EGUsphere, https://doi.org/10.5194/egusphere-2024-417, https://doi.org/10.5194/egusphere-2024-417, 2024
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Ocean alkalinity enhancement (OAE) is being assessed for its potential to absorb atmospheric CO2 and store it for a long time. OAE still needs comprehensive assessment of its safety and effectiveness. We studied an idealised OAE application in a natural low nutrient ecosystem over one month. Our results showed that biogeochemical functioning remained mostly stable, but that the long-term capability for storing carbon may be limited at high alkalinity concentration.
Takamitsu Ito, Hernan E. Garcia, Zhankun Wang, Shoshiro Minobe, Matthew C. Long, Just Cebrian, James Reagan, Tim Boyer, Christopher Paver, Courtney Bouchard, Yohei Takano, Seth Bushinsky, Ahron Cervania, and Curtis A. Deutsch
Biogeosciences, 21, 747–759, https://doi.org/10.5194/bg-21-747-2024, https://doi.org/10.5194/bg-21-747-2024, 2024
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This study aims to estimate how much oceanic oxygen has been lost and its uncertainties. One major source of uncertainty comes from the statistical gap-filling methods. Outputs from Earth system models are used to generate synthetic observations where oxygen data are extracted from the model output at the location and time of historical oceanographic cruises. Reconstructed oxygen trend is approximately two-thirds of the true trend.
Robert W. Izett, Katja Fennel, Adam C. Stoer, and David P. Nicholson
Biogeosciences, 21, 13–47, https://doi.org/10.5194/bg-21-13-2024, https://doi.org/10.5194/bg-21-13-2024, 2024
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This paper provides an overview of the capacity to expand the global coverage of marine primary production estimates using autonomous ocean-going instruments, called Biogeochemical-Argo floats. We review existing approaches to quantifying primary production using floats, provide examples of the current implementation of the methods, and offer insights into how they can be better exploited. This paper is timely, given the ongoing expansion of the Biogeochemical-Argo array.
Qian Liu, Yingjie Liu, and Xiaofeng Li
Biogeosciences, 20, 4857–4874, https://doi.org/10.5194/bg-20-4857-2023, https://doi.org/10.5194/bg-20-4857-2023, 2023
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In the Southern Ocean, abundant eddies behave opposite to our expectations. That is, anticyclonic (cyclonic) eddies are cold (warm). By investigating the variations of physical and biochemical parameters in eddies, we find that abnormal eddies have unique and significant effects on modulating the parameters. This study fills a gap in understanding the effects of abnormal eddies on physical and biochemical parameters in the Southern Ocean.
Caroline Ulses, Claude Estournel, Patrick Marsaleix, Karline Soetaert, Marine Fourrier, Laurent Coppola, Dominique Lefèvre, Franck Touratier, Catherine Goyet, Véronique Guglielmi, Fayçal Kessouri, Pierre Testor, and Xavier Durrieu de Madron
Biogeosciences, 20, 4683–4710, https://doi.org/10.5194/bg-20-4683-2023, https://doi.org/10.5194/bg-20-4683-2023, 2023
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Deep convection plays a key role in the circulation, thermodynamics, and biogeochemical cycles in the Mediterranean Sea, considered to be a hotspot of biodiversity and climate change. In this study, we investigate the seasonal and annual budget of dissolved inorganic carbon in the deep-convection area of the northwestern Mediterranean Sea.
Daniela König and Alessandro Tagliabue
Biogeosciences, 20, 4197–4212, https://doi.org/10.5194/bg-20-4197-2023, https://doi.org/10.5194/bg-20-4197-2023, 2023
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Using model simulations, we show that natural and anthropogenic changes in the global climate leave a distinct fingerprint in the isotopic signatures of iron in the surface ocean. We find that these climate effects on iron isotopes are often caused by the redistribution of iron from different external sources to the ocean, due to changes in ocean currents, and by changes in algal growth, which take up iron. Thus, isotopes may help detect climate-induced changes in iron supply and algal uptake.
Chloé Baumas, Robin Fuchs, Marc Garel, Jean-Christophe Poggiale, Laurent Memery, Frédéric A. C. Le Moigne, and Christian Tamburini
Biogeosciences, 20, 4165–4182, https://doi.org/10.5194/bg-20-4165-2023, https://doi.org/10.5194/bg-20-4165-2023, 2023
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Through the sink of particles in the ocean, carbon (C) is exported and sequestered when reaching 1000 m. Attempts to quantify C exported vs. C consumed by heterotrophs have increased. Yet most of the conducted estimations have led to C demands several times higher than C export. The choice of parameters greatly impacts the results. As theses parameters are overlooked, non-accurate values are often used. In this study we show that C budgets can be well balanced when using appropriate values.
Anna Belcher, Sian F. Henley, Katharine Hendry, Marianne Wootton, Lisa Friberg, Ursula Dallman, Tong Wang, Christopher Coath, and Clara Manno
Biogeosciences, 20, 3573–3591, https://doi.org/10.5194/bg-20-3573-2023, https://doi.org/10.5194/bg-20-3573-2023, 2023
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The oceans play a crucial role in the uptake of atmospheric carbon dioxide, particularly the Southern Ocean. The biological pumping of carbon from the surface to the deep ocean is key to this. Using sediment trap samples from the Scotia Sea, we examine biogeochemical fluxes of carbon, nitrogen, and biogenic silica and their stable isotope compositions. We find phytoplankton community structure and physically mediated processes are important controls on particulate fluxes to the deep ocean.
Asmita Singh, Susanne Fietz, Sandy J. Thomalla, Nicolas Sanchez, Murat V. Ardelan, Sébastien Moreau, Hanna M. Kauko, Agneta Fransson, Melissa Chierici, Saumik Samanta, Thato N. Mtshali, Alakendra N. Roychoudhury, and Thomas J. Ryan-Keogh
Biogeosciences, 20, 3073–3091, https://doi.org/10.5194/bg-20-3073-2023, https://doi.org/10.5194/bg-20-3073-2023, 2023
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Despite the scarcity of iron in the Southern Ocean, seasonal blooms occur due to changes in nutrient and light availability. Surprisingly, during an autumn bloom in the Antarctic sea-ice zone, the results from incubation experiments showed no significant photophysiological response of phytoplankton to iron addition. This suggests that ambient iron concentrations were sufficient, challenging the notion of iron deficiency in the Southern Ocean through extended iron-replete post-bloom conditions.
Benoît Pasquier, Mark Holzer, Matthew A. Chamberlain, Richard J. Matear, Nathaniel L. Bindoff, and François W. Primeau
Biogeosciences, 20, 2985–3009, https://doi.org/10.5194/bg-20-2985-2023, https://doi.org/10.5194/bg-20-2985-2023, 2023
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Modeling the ocean's carbon and oxygen cycles accurately is challenging. Parameter optimization improves the fit to observed tracers but can introduce artifacts in the biological pump. Organic-matter production and subsurface remineralization rates adjust to compensate for circulation biases, changing the pathways and timescales with which nutrients return to the surface. Circulation biases can thus strongly alter the system’s response to ecological change, even when parameters are optimized.
Priyanka Banerjee
Biogeosciences, 20, 2613–2643, https://doi.org/10.5194/bg-20-2613-2023, https://doi.org/10.5194/bg-20-2613-2023, 2023
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This study shows that atmospheric deposition is the most important source of iron to the upper northern Indian Ocean for phytoplankton growth. This is followed by iron from continental-shelf sediment. Phytoplankton increase following iron addition is possible only with high background levels of nitrate. Vertical mixing is the most important physical process supplying iron to the upper ocean in this region throughout the year. The importance of ocean currents in supplying iron varies seasonally.
Iris Kriest, Julia Getzlaff, Angela Landolfi, Volkmar Sauerland, Markus Schartau, and Andreas Oschlies
Biogeosciences, 20, 2645–2669, https://doi.org/10.5194/bg-20-2645-2023, https://doi.org/10.5194/bg-20-2645-2023, 2023
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Global biogeochemical ocean models are often subjectively assessed and tuned against observations. We applied different strategies to calibrate a global model against observations. Although the calibrated models show similar tracer distributions at the surface, they differ in global biogeochemical fluxes, especially in global particle flux. Simulated global volume of oxygen minimum zones varies strongly with calibration strategy and over time, rendering its temporal extrapolation difficult.
John C. Tracey, Andrew R. Babbin, Elizabeth Wallace, Xin Sun, Katherine L. DuRussel, Claudia Frey, Donald E. Martocello III, Tyler Tamasi, Sergey Oleynik, and Bess B. Ward
Biogeosciences, 20, 2499–2523, https://doi.org/10.5194/bg-20-2499-2023, https://doi.org/10.5194/bg-20-2499-2023, 2023
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Nitrogen (N) is essential for life; thus, its availability plays a key role in determining marine productivity. Using incubations of seawater spiked with a rare form of N measurable on a mass spectrometer, we quantified microbial pathways that determine marine N availability. The results show that pathways that recycle N have higher rates than those that result in its loss from biomass and present new evidence for anaerobic nitrite oxidation, a process long thought to be strictly aerobic.
Amanda Gerotto, Hongrui Zhang, Renata Hanae Nagai, Heather M. Stoll, Rubens César Lopes Figueira, Chuanlian Liu, and Iván Hernández-Almeida
Biogeosciences, 20, 1725–1739, https://doi.org/10.5194/bg-20-1725-2023, https://doi.org/10.5194/bg-20-1725-2023, 2023
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Based on the analysis of the response of coccolithophores’ morphological attributes in a laboratory dissolution experiment and surface sediment samples from the South China Sea, we proposed that the thickness shape (ks) factor of fossil coccoliths together with the normalized ks variation, which is the ratio of the standard deviation of ks (σ) over the mean ks (σ/ks), is a robust and novel proxy to reconstruct past changes in deep ocean carbon chemistry.
Katherine E. Turner, Doug M. Smith, Anna Katavouta, and Richard G. Williams
Biogeosciences, 20, 1671–1690, https://doi.org/10.5194/bg-20-1671-2023, https://doi.org/10.5194/bg-20-1671-2023, 2023
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We present a new method for reconstructing ocean carbon using climate models and temperature and salinity observations. To test this method, we reconstruct modelled carbon using synthetic observations consistent with current sampling programmes. Sensitivity tests show skill in reconstructing carbon trends and variability within the upper 2000 m. Our results indicate that this method can be used for a new global estimate for ocean carbon content.
Alexandre Mignot, Hervé Claustre, Gianpiero Cossarini, Fabrizio D'Ortenzio, Elodie Gutknecht, Julien Lamouroux, Paolo Lazzari, Coralie Perruche, Stefano Salon, Raphaëlle Sauzède, Vincent Taillandier, and Anna Teruzzi
Biogeosciences, 20, 1405–1422, https://doi.org/10.5194/bg-20-1405-2023, https://doi.org/10.5194/bg-20-1405-2023, 2023
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Numerical models of ocean biogeochemistry are becoming a major tool to detect and predict the impact of climate change on marine resources and monitor ocean health. Here, we demonstrate the use of the global array of BGC-Argo floats for the assessment of biogeochemical models. We first detail the handling of the BGC-Argo data set for model assessment purposes. We then present 23 assessment metrics to quantify the consistency of BGC model simulations with respect to BGC-Argo data.
Alban Planchat, Lester Kwiatkowski, Laurent Bopp, Olivier Torres, James R. Christian, Momme Butenschön, Tomas Lovato, Roland Séférian, Matthew A. Chamberlain, Olivier Aumont, Michio Watanabe, Akitomo Yamamoto, Andrew Yool, Tatiana Ilyina, Hiroyuki Tsujino, Kristen M. Krumhardt, Jörg Schwinger, Jerry Tjiputra, John P. Dunne, and Charles Stock
Biogeosciences, 20, 1195–1257, https://doi.org/10.5194/bg-20-1195-2023, https://doi.org/10.5194/bg-20-1195-2023, 2023
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Ocean alkalinity is critical to the uptake of atmospheric carbon and acidification in surface waters. We review the representation of alkalinity and the associated calcium carbonate cycle in Earth system models. While many parameterizations remain present in the latest generation of models, there is a general improvement in the simulated alkalinity distribution. This improvement is related to an increase in the export of biotic calcium carbonate, which closer resembles observations.
Jérôme Pinti, Tim DeVries, Tommy Norin, Camila Serra-Pompei, Roland Proud, David A. Siegel, Thomas Kiørboe, Colleen M. Petrik, Ken H. Andersen, Andrew S. Brierley, and André W. Visser
Biogeosciences, 20, 997–1009, https://doi.org/10.5194/bg-20-997-2023, https://doi.org/10.5194/bg-20-997-2023, 2023
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Large numbers of marine organisms such as zooplankton and fish perform daily vertical migration between the surface (at night) and the depths (in the daytime). This fascinating migration is important for the carbon cycle, as these organisms actively bring carbon to depths where it is stored away from the atmosphere for a long time. Here, we quantify the contributions of different animals to this carbon drawdown and storage and show that fish are important to the biological carbon pump.
Alastair J. M. Lough, Alessandro Tagliabue, Clément Demasy, Joseph A. Resing, Travis Mellett, Neil J. Wyatt, and Maeve C. Lohan
Biogeosciences, 20, 405–420, https://doi.org/10.5194/bg-20-405-2023, https://doi.org/10.5194/bg-20-405-2023, 2023
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Iron is a key nutrient for ocean primary productivity. Hydrothermal vents are a source of iron to the oceans, but the size of this source is poorly understood. This study examines the variability in iron inputs between hydrothermal vents in different geological settings. The vents studied release different amounts of Fe, resulting in plumes with similar dissolved iron concentrations but different particulate concentrations. This will help to refine modelling of iron-limited ocean productivity.
Nicole M. Travis, Colette L. Kelly, Margaret R. Mulholland, and Karen L. Casciotti
Biogeosciences, 20, 325–347, https://doi.org/10.5194/bg-20-325-2023, https://doi.org/10.5194/bg-20-325-2023, 2023
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The primary nitrite maximum is a ubiquitous upper ocean feature where nitrite accumulates, but we still do not understand its formation and the co-occurring microbial processes involved. Using correlative methods and rates measurements, we found strong spatial patterns between environmental conditions and depths of the nitrite maxima, but not the maximum concentrations. Nitrification was the dominant source of nitrite, with occasional high nitrite production from phytoplankton near the coast.
Natacha Le Grix, Jakob Zscheischler, Keith B. Rodgers, Ryohei Yamaguchi, and Thomas L. Frölicher
Biogeosciences, 19, 5807–5835, https://doi.org/10.5194/bg-19-5807-2022, https://doi.org/10.5194/bg-19-5807-2022, 2022
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Compound events threaten marine ecosystems. Here, we investigate the potentially harmful combination of marine heatwaves with low phytoplankton productivity. Using satellite-based observations, we show that these compound events are frequent in the low latitudes. We then investigate the drivers of these compound events using Earth system models. The models share similar drivers in the low latitudes but disagree in the high latitudes due to divergent factors limiting phytoplankton production.
Abigale M. Wyatt, Laure Resplandy, and Adrian Marchetti
Biogeosciences, 19, 5689–5705, https://doi.org/10.5194/bg-19-5689-2022, https://doi.org/10.5194/bg-19-5689-2022, 2022
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Marine heat waves (MHWs) are a frequent event in the northeast Pacific, with a large impact on the region's ecosystems. Large phytoplankton in the North Pacific Transition Zone are greatly affected by decreased nutrients, with less of an impact in the Alaskan Gyre. For small phytoplankton, MHWs increase the spring small phytoplankton population in both regions thanks to reduced light limitation. In both zones, this results in a significant decrease in the ratio of large to small phytoplankton.
Margot C. F. Debyser, Laetitia Pichevin, Robyn E. Tuerena, Paul A. Dodd, Antonia Doncila, and Raja S. Ganeshram
Biogeosciences, 19, 5499–5520, https://doi.org/10.5194/bg-19-5499-2022, https://doi.org/10.5194/bg-19-5499-2022, 2022
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We focus on the exchange of key nutrients for algae production between the Arctic and Atlantic oceans through the Fram Strait. We show that the export of dissolved silicon here is controlled by the availability of nitrate which is influenced by denitrification on Arctic shelves. We suggest that any future changes in the river inputs of silica and changes in denitrification due to climate change will impact the amount of silicon exported, with impacts on Atlantic algal productivity and ecology.
Emily J. Zakem, Barbara Bayer, Wei Qin, Alyson E. Santoro, Yao Zhang, and Naomi M. Levine
Biogeosciences, 19, 5401–5418, https://doi.org/10.5194/bg-19-5401-2022, https://doi.org/10.5194/bg-19-5401-2022, 2022
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We use a microbial ecosystem model to quantitatively explain the mechanisms controlling observed relative abundances and nitrification rates of ammonia- and nitrite-oxidizing microorganisms in the ocean. We also estimate how much global carbon fixation can be associated with chemoautotrophic nitrification. Our results improve our understanding of the controls on nitrification, laying the groundwork for more accurate predictions in global climate models.
Cited articles
ACIA: Arctic Climate Impact Assessment. Impacts of a warming arctic: Arctic climate impact assessment, Cambridge University Press, Cambridge, UK, 2004.
Agusti, S. and Duarte, C. M.: Threshold of gross primary production for planktonic metabolic balance in the Southern Ocean: An experimental test, Limnol. Oceanogr., 50, 1334–1339, 2005.
Agusti, S., Satta, M. P., and Mura, M. P.: Summer community respiration and pelagic metabolism in upper surface Antarctic waters, Aquat. Microb. Ecol., 35, 197–205, 2004.
Alcaraz, M., Almeda, R., Calbet, A., Saiz, E., Duarte, C. M., Lasternas, S., Agustí, S., Santiago, R., Movilla, J., and Alonso, A.: The role of arctic zooplankton in biogeochemical cycles: respiration and excretion of ammonia and phosphate during summer, Polar Biol., 33, 1719–1731, 2010.
Alexander, V.: Primary productivity regimes of the nearshore Beaufort Sea, with reference to potential roles of ice biota, in: The coast and shelf of the Beaufort Sea, edited by: Reed J. C. and Sater, J. E., The Arctic Institute of North America, Calgary, Alberta, 609–632, 1974.
Apollonio, S.: Primary Production in Dumbbell Bay in the Arctic Ocean, Mar. Biol., 61, 41–51, 1980.
Ardyna, M., Gosselin, M., Michel, C., Poulin, M., and Tremblay, J. E.: Environmental forcing of phytoplankton community structure and function in the Canadian High Arctic: contrasting oligotrophic and eutrophic regions, Mar. Ecol.-Prog. Ser., 442, 37–57, 2011.
Arrigo, K. R., van Dijken, G., and Pabi, S.: Impact of a shrinking Arctic ice cover on marine primary production, Geophys. Res. Lett., 35, L19603, https://doi.org/10.1029/2008GL035028, 2008.
Azam, F., Smith, D. C., and Hollibaugh, J. T.: The Role of the Microbial Loop in Antarctic Pelagic Ecosystems, Polar Res., 10, 239–243, 1991.
Azam, F., Smith, D. C., Steward, G. F., and Hagstrom, A.: Bacteria – Organic-Matter Coupling and Its Significance for Oceanic Carbon Cycling, Microb. Ecol., 28, 167–179, 1994.
Bender, M. L.: Oceanography – Tracer from the sky, Science, 288, 1977–1978, 2000.
Benner, R., Louchouarn, P., and Amon, R. M. W.: Terrigenous dissolved organic matter in the Arctic Ocean and its transport to surface and deep waters of the North Atlantic, Glob. Biogeochem. Cy., 19, GB2025, https://doi.org/2010.1029/2004GB002398, 2005.
Boyer Montegut, C. D., Madec, G., Fischer, A. S., Lazar, A., and Iudicone, D.: Mixed layer depth over the global ocean: An examination of profile data and a profile-based climatology, J. Geophys. Res.-Oceans., 109, C12003, https://doi.org/10.1029/2004JC002378, 2004.
Brown, J. H., Gillooly, J. F., Allen, A. P., Savage, V. M., and West, G. B.: Toward a metabolic theory of ecology, Ecology, 85, 1771–1789, 2004.
Brown, Z. W., van Dijken, G. L., and Arrigo, K. R.: A reassessment of primary production and environmental change in the Bering Sea, J. Geophys. Res.-Oceans, 116, C08014, https://doi.org/10.1029/2010JC006766, 2011.
Cade, B. S. and Noon, B. R.: A gentle introduction to quantile regression for ecologists, Front. Ecol. Environ., 1, 412–420, 2003.
Carmack, E. and Wassmann, P.: Food webs and physical-biological coupling on pan-Arctic shelves: Unifying concepts and comprehensive perspectives, Prog. Oceanogr., 71, 446–477, 2006.
Carmack, E., Barber, D., Christensen, J., Macdonald, R., Rudels, B., and Sakshaug, E.: Climate variability and physical forcing of the food webs and the carbon budget on panarctic shelves, Prog. Oceanogr., 71, 145–181, 2006.
Carritt, D. E. and Carpenter, J.: Comparison and Evaluation of Currently Employed Modifications of Winkler Method for Determining Dissolved Oxygen in Seawater – a Nasco Report, J. Mar. Res., 24, 286–318, 1966.
Cole, J. J., Pace, M. L., Carpenter, S. R., and Kitchell, J. F.: Persistence of net heterotrophy in lakes during nutrient addition and food web manipulations, Limnol. Oceanogr., 45, 1718–1730, 2000.
Cooper, L. W., Benner, R., McClelland, J. W., Peterson, B. J., Holmes, R. M., Raymond, P. A., Hansell, D. A., Grebmeier, J. M., and Codispoti, L. A.: Linkages among runoff, dissolved organic carbon, and the stable oxygen isotope composition of seawater and other water mass indicators in the Arctic Ocean, J. Geophys. Res.-Biogeo., 110, G02013, https://doi.org/10.1029/2005JG000031, 2005.
Cota, G. F., Pomeroy, L. R., Harrison, W. G., Jones, E. P., Peters, F., Sheldon, W. M., and Weingartner, T. R.: Nutrients, primary production and microbial heterotrophy in the southeastern Chukchi Sea: Arctic summer nutrient depletion and heterotrophy, Mar. Ecol.-Prog. Ser., 135, 247–258, 1996.
Cottier, F. R., Nilsen, F., Inall, M. E., Gerland, S., Tverberg, V., and Svendsen, H.: Wintertime warming of an Arctic shelf in response to large-scale atmospheric circulation, Geophys. Res. Lett., 34, L10607, https://doi.org/10610.11029/12007GL029948, 2007.
Cottrell, M. T., Malmstrom, R. R., Hill, V., Parker, A. E., and Kirchman, D. L.: The metabolic balance between autotrophy and heterotrophy in the western Arctic Ocean, Deep-Sea Res. I, 53, 1831–1844, 2006.
Dickson, M. J. and Orchardo J.: Oxygen production and respiration in the Antarctic Polar Front region during the austral spring and summer, Deep Sea Res. II, 48, 4101–4126, https://doi.org/10.1016/S0967-0645(01)00082-0, 2001.
Dmitrenko, I. A., Polyakov, I. V., Kirillov, S. A., Timokhov, L. A., Frolov, I. E., Sokolov, V. T., Simmons, H. L., Ivanov, V. V., and Walsh, D.: Toward a warmer Arctic Ocean: Spreading of the early 21st century Atlantic Water warm anomaly along the Eurasian Basin margins, J. Geophys. Res.-Oceans, 113, C05023, https://doi.org/05010.01029/02007JC004158, 2008.
Duarte, C. M. and Agusti, S.: The CO2 balance of unproductive aquatic ecosystems, Science, 281, 234–236, 1998.
Duarte, C. M. and Regaudie-de-Gioux, A.: Thresholds of Gross Primary Production for the Metabolic Balance of Marine Planktonic Communities, Limnol. Oceanogr., 54, 1015–1022, 2009.
Duarte, C. M., A. Regaudie-de-Gioux, J. M. Arrieta, A. Delgado-Huertas, and S. Agustí: The oligotrophic ocean is heterotrophic, Ann. Rev. Mar. Sci., 5, 18.1–18.19, https://doi.org/10.1146/annurev-marine-121211-172337, 2012.
Edwards, M. and Richardson, A. J.: Impact of climate change on marine pelagic phenology and trophic mismatch, Nature, 430, 881–884, 2004.
Ellingsen, I. H., Dalpadado, P., Slagstad, D., and Loeng, H.: Impact of climatic change on the biological production in the Barents Sea, Clim. Change, 87, 155–175, 2008.
English, T. S.: Some biological oceanographic observations in the central North Polar Sea. Drift Station Alpha, 1957–1958, Arctic Institute of North America, Research Paper, 13, 8–80, 1961.
Falk-Petersen, S., Sargent, J. R., Henderson, J., Hegseth, E. N., Hop, H., and Okolodkov, Y. B.: Lipids and fatty acids in ice algae and phytoplankton from the Marginal Ice Zone in the Barents Sea, Polar Biol., 20, 41–47, 1998.
Fogg, G. E. and Calvario-Martinez, O.: Effects of Bottle Size in Determinations of Primary Productivity by Phytoplankton, Hydrobiologia, 173, 89–94, 1989.
Friedrich, H., Houssais, M. N., Quadfasel, D., and Rudels, B.: On Fram Strait Water Masses, Extended Abstract, Nordic Seas, Symposium, Hamburg, 7–9 March 1995, 69–72, 1995.
Garcia-Martin, E. E., Serret, P., and Perez-Lorenzo, M.: Testing potential bias in marine plankton respiration rates by dark bottle incubations in the NW Iberian shelf: incubation time and bottle volume, Cont. Shelf Res., 31, 496–506, 2011.
Gasol, J. M., Pinhassi, J., Alonso-Saez, L., Ducklow, H., Herndl, G. J., Koblizek, M., Labrenz, M., Luo, Y., Moran, X. A. G., Reinthaler, T., and Simon, M.: Towards a better understanding of microbial carbon flux in the sea, Aquat. Microb. Ecol., 53, 21–38, 2008.
Gosselin, M., Levasseur, M., Wheeler, P. A., Horner, R. A., and Booth, B. C.: New measurements of phytoplankton and ice algal production in the Arctic Ocean, Deep-Sea Res. II, 44, 1623–1644, 1997.
Grande, K. D., Marra, J., Langdon, C., Heinemann, K., and Bender, M. L.: Rates of Respiration in the Light Measured in Marine-Phytoplankton Using an O-18 Isotope-Labeling Technique, J. Exp. Mar. Biol. Ecol., 129, 95–120, 1989.
Hameedi, M. J.: Aspects of Water Column Primary Productivity in Chukchi Sea during Summer, Mar. Biol., 48, 37–46, 1978.
Hammes, F., Vital, M., and Egli, T.: Critical Evaluation of the Volumetric "Bottle Effect" on Microbial Batch Growth, Appl. Environ. Microb., 76, 1278–1281, 2010.
Hansell, D. A., Kadko, D., and Bates, N. R.: Degradation of terrigenous dissolved organic carbon in the western Arctic Ocean, Science, 304, 858–861, 2004.
Harris, L. A., Duarte, C. M., and Nixon, S. W.: Allometric laws and prediction in estuarine and coastal ecology, Estuaries Coasts, 29, 340–344, 2006.
Harrison, W. G., Platt, T., and Irwin, B.: Primary Production and Nutrient Assimilation by Natural Phytoplankton Populations of the Eastern Canadian Arctic, Can. J. Fish Aquat. Sci., 39, 335–345, 1982.
Hegseth, E. N.: Primary production of the northern Barents Sea, Polar Res., 17, 113–123, 1998.
Hendricks, M. B., Bender, M. L., and Barnett, B. A.: Net and gross O2 production in the Southern Ocean from measurements of biological O2 saturation and its triple isotope composition, Deep-Sea Res. I, 51, 1541–1561, 2004.
Hinder, S. L., Manning, J. E., Gravenor, M. B., Edwards, M., Walne, A. W., Burkill, P. H., and Hays, G. C.: Long-term changes in abundance and distribution of microzooplankton in the NE Atlantic and North Sea, J. Plankton. Res., 34, 83–91, 2012.
Hodal, H. and Kristiansen, S.: The importance of small-celled phytoplankton in spring blooms at the marginal ice zone in the northern Barents Sea, Deep-Sea Res. II, 55, 2176–2185, 2008.
Holding, J. M., Duarte, C. M., Arrieta, J. M., Vaquer-Sunyer, R., Coello-Camba, A., Wassmann, P., and Agustí, S.: Experimentally determined temperature thresholds for Arctic plankton community metabolism, Biogeosciences, 10, 357–370, https://doi.org/10.5194/bg-10-357-2013, 2013.
Holmes, R. M., McClelland, J. W., Raymond, P. A., Frazer, B. B., Peterson, B. J., and Stieglitz, M.: Lability of DOC transported by Alaskan rivers to the arctic ocean, Geophys. Res. Lett., 35, L03402, https://doi.org/10.1029/2007GL032837, 2008.
Hood, E., Fellman, J., Spencer, R. G. M., Hernes, P. J., Edwards, R., D'Amore, D., and Scott, D.: Glaciers as a source of ancient and labile organic matter to the marine environment, Nature, 462, 1044–1047, 2009.
Hop, H., Falk-Petersen, S., Svendsen, H., Kwasniewski, S., Pavlov, V., Pavlova, O., and Soreide, J. E.: Physical and biological characteristics of the pelagic system across Fram Strait to Kongsfjorden, Prog. Oceanogr., 71, 182–231, 2006.
Horner, R. and Schrader, G. C.: Relative Contributions of Ice Algae, Phytoplankton, and Benthic Microalgae to Primary Production in Nearshore Regions of the Beaufort Sea, Arctic, 35, 485–503, 1982.
Houghton, J.: Global warming, Rep. Prog. Phys., 68, 1343–1403, 2005.
Iriberri, J., Undurraga, A., Muela, A., and Egea, L.: Heterotrophic Bacterial-Activity in Coastal Waters – Functional-Relationship of Temperature and Phytoplankton Population, Ecol. Model., 28, 113–120, 1985.
Ishii, M., Inoue, H. Y., Matsueda, H., and Tanoue, E.: Close coupling between seasonal biological production and dynamics of dissolved inorganic carbon in the Indian Ocean sector and the western Pacific Ocean sector of the Antarctic Ocean, Deep-Sea Res. I, 45, 1187–1209, 1998.
Ivanov, V. V., Polyakov, I. V., Dmitrenko, I. A., Hansen, E., Repina, I. A., Kirillov, S. A., Mauritzen, C., Simmons, H., and Timokhov, L. A.: Seasonal variability in Atlantic Water off Spitsbergen, Deep-Sea Res. I, 56, 1–14, 2009.
Juranek, L. W. and Quay, P. D.: In vitro and in situ gross primary and net community production in the North Pacific Subtropical Gyre using labeled and natural abundance isotopes of dissolved O2, Glob. Biogeochem. Cy., 19, GB3009, https://doi.org/10.1029/2004GB002384, 2005.
Kerr, R. A.: Climate change – Is battered Arctic sea ice down for the count?, Science, 318, 33–34, 2007.
Kirk, J. T. O.: Light and photosynthesis in aquatic ecosystems, Cambridge University Press, Cambridge, 1983.
Koenker, R.: Quantile Regression, Cambridge Univ. Press, New York., 1st Edn., 349 pp., 2005.
Kritzberg, E. S., Duarte, C. M., and Wassmann, P.: Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature, Polar Biol., 33, 1673-1682, 2010.
Kwok, R., Cunningham, G. F., Wensnahan, M., Rigor, I., Zwally, H. J., and Yi, D.: Thinning and volume loss of the Arctic Ocean sea ice cover: 2003–2008, J. Geophys. Res.-Oceans, 114, C07005, https://doi.org/10.1029/2009JC005312, 2009.
Lasternas, S., Agusti, S., and Duarte, C. M.: Phyto- and bacterioplankton abundance and viability and their relationship with phosphorus across the Mediterranean Sea, Aquat. Microb. Ecol., 60, 175–191, 2010.
Lavoie, D., MacDonald, R. W., and Denman, K. L.: Primary productivity and export fluxes on the Canadian shelf of the Beaufort Sea: A modelling study, J. Marine Syst., 75, 17–32, 2009.
Lefèvre, D., Guigue, C., and Obernosterer, I.: The metabolic balance at two contrasting sites in the Southern Ocean: The iron-fertilized Kerguelen area and HNLC waters, Deep Sea Res. II, 55, 766–776, https://doi.org/10.1016/j.dsr2.2007.12.006, 2008.
Letscher, R. T., Hansell, D. A., and Kadko, D.: Rapid removal of terrigenous dissolved organic carbon over the Eurasian shelves of the Arctic Ocean, Mar. Chem., 123, 78–87, 2011.
Lopez-Urrutia, A., San Martin, E., Harris, R. P., and Irigoien, X.: Scaling the metabolic balance of the oceans, P. Natl. Acad. Sci. USA, 103, 8739–8744, 2006.
Luz, B. and Barkan, E.: Assessment of oceanic productivity with the triple-isotope composition of dissolved oxygen, Science, 288, 2028–2031, 2000.
Massana, R., Pedros-Alio, C., Casamayor, E. O., and Gasol, J. M.: Changes in marine bacterioplankton phylogenetic composition during incubations designed to measure biogeochemically significant parameters, Limnol. Oceanogr., 46, 1181–1188, 2001.
Matsuoka, A., Larouche, P., Poulin, M., Vincent, W., and Hattori, H.: Phytoplankton community adaptation to changing light levels in the southern Beaufort Sea, Canadian Arctic, Estuar. Coast Shelf. S., 82, 537–546, 2009.
Montoya, J. M. and Raffaelli, D.: Climate change, biotic interactions and ecosystem services, Philos. T. R. Soc. B., 365, 2013–2018, 2010.
Montes-Hugo, M., Doney, S. C., Ducklow, H. W., Fraser, W., Martinson, D., Stammerjohn, S. E., and Schofield, O.: Recent Changes in Phytoplankton Communities Associated with Rapid Regional Climate Change Along the Western Antarctic Peninsula, Science, 323, 1470–1473, 2009.
Montes-Hugo, M., Sweeney, C., Doney, S. C., Ducklow, H., Frouin, R., Martinson, D. G., Stammerjohn, S., and Schofield, O.: Seasonal forcing of summer dissolved inorganic carbon and chlorophyll a on the western shelf of the Antarctic Peninsula, J. Geophys. Res.-Oceans, 115, C03024, https://doi.org/10.1029/2009JC005267, 2010.
Müren, U., Berglund, J., Samuelsson, K., and Andersson, A.: Potential effects of elevated sea-water temperature on pelagic food webs, Hydrobiologia, 545, 153–166, 2005.
Nguyen, D. and Maranger, R.: Respiration and bacterial carbon dynamics in Arctic sea ice, Polar Biol., 34, 1843–1855, 2011.
Olli, K., Wassmann, P., Reigstad, M., Ratkova, T. N., Arashkevich, E., Pasternak, A., Matrai, P. A., Knulst, J., Tranvik, L., Klais, R., and Jacobsen, A.: The fate of production in the central Arctic Ocean – Top-down regulation by zooplankton expatriates?, Prog. Oceanogr., 72, 84–113, 2007.
Ortega-Retuerta, E., Reche, I., Pulido-Villena, E., Agusti, S., and Duarte, C. M.: Exploring the relationship between active bacterioplankton and phytoplankton in the Southern Ocean, Aquat. Microb. Ecol., 52, 99–106, 2008.
Oudot, C., Gerard, R., Morin, P., and Gningue, I.: Precise Shipboard Determination of Dissolved-Oxygen (Winkler Procedure) for Productivity Studies with a Commercial System, Limnol. Oceanogr., 33, 146–150, 1988.
Pabi, S., van Dijken, G. L., and Arrigo, K. R.: Primary production in the Arctic Ocean, 1998–2006, J. Geophys. Res., 113, C08005, https://doi.org/10.1029/2007JC004578, 2008.
Pace, M. L. and Prairie, Y. T.: Respiration in lakes, in: Respiration in aquatic ecosystems, edited by: del Giorgio, P. A. and Williams, P. J. leB., Oxford University Press, 103–121, 2005.
Parsons, T. R. M. and Lalli, C. M.: A manual of chemical and biological methods for seawater analysis, Pergamon international library of science, technology, engineering and social studies, Oxford [Oxfordshire], Pergamon Press, New York, 1984.
Pernthaler, J. and Amann, R.: Fate of heterotrophic microbes in pelagic habitats: Focus on populations, Microbiol. Mol. Biol. R., 69, 440–461, 2005.
Peterson, B. J., Holmes, R. M., McClelland, J. W., Vorosmarty, C. J., Lammers, R. B., Shiklomanov, A. I., Shiklomanov, I. A., and Rahmstorf, S.: Increasing river discharge to the Arctic Ocean, Science, 298, 2171–2173, 2002.
Prairie, Y. T. and Bird, D. F.: Some Misconceptions About the Spurious Correlation-Problem in the Ecological Literature, Oecologia, 81, 285–288, 1989.
Pringault, O., Tassas, V., and Rochelle-Newall, E.: Consequences of respiration in the light on the determination of production in pelagic systems, Biogeosciences, 4, 105-114, https://doi.org/10.5194/bg-4-105-2007, 2007.
Quay, P. D., Emerson, S., Wilbur, D. O., Stump, C., and Knox, M.: The Delta-O-18 of Dissolved O2 in the Surface Waters of the Sub-Arctic Pacific – a Tracer of Biological Productivity, J. Geophys. Res.-Oceans, 98, 8447–8458, 1993.
Rachold, V., Eicken, H., Gordeev, V., Grigoriev, M., Hubberten, H., Lisitzin, A., Shevchenko, V., and Shirrmeister, L.: Modern Terrigenous Organic Carbon Input to the Arctic Ocean, in: The Organic Carbon Cycle in the Arctic Ocean, edited by: Stein, R. and Macdonald, R. W., Springer-Verlag, Berlin-Heidelberg-New York, 33–55, 2004.
Rao, D. V. S. and Platt, T.: Primary Production of Arctic Waters, Polar Biol., 3, 191–201, 1984.
Regaudie-de-Gioux, A. and Duarte, C. M.: Plankton metabolism in the Greenland Sea during the polar summer of 2007, Polar Biol., 33, 1651–1660, 2010.
Reigstad, M., Wassmann, P., Riser, C. W., Oygarden, S., and Rey, F.: Variations in hydrography, nutrients and chlorophyll a in the marginal ice-zone and the central Barents Sea, J. Marine Syst., 38, 9–29, 2002.
Reuer, M. K., Barnett, B. A., Bender, M. L., Falkowski, P. G., and Hendricks, M. B.: New estimates of Southern Ocean biological production rates from O2/Ar ratios and the triple isotope composition of O2, Deep-Sea Res. I, 54, 951–974, 2007.
Robinson, C. and Williams, P. J. B.: Respiration and its measurement in surface marine waters, 147–180, in: Respiration in aquatic ecosystems, edited by: del Giorgio, P. A. and Williams, P. J. leB., Oxford University Press, 148–178, 2005.
Robinson, C., Archer, S. D., and Williams, P. J. L.: Microbial dynamics in coastal waters of East Antarctica: plankton production and respiration, Mar. Ecol.-Prog. Ser., 180, 23–36, 1999.
Rudels, B., Bjork, G., Muench, R. D., and Schauer, U.: Double-diffusive layering in the Eurasian basin of the Arctic Ocean, J. Marine Syst., 21, 3–27, 1999.
Rudels, B., Meyer, R., Fahrbach, E., Ivanov, V. V., Osterhus, S., Quadfasel, D., Schauer, U., Tverberg, V., and Woodgate, R. A.: Water mass distribution in Fram Strait and over the Yermak Plateau in summer 1997, Ann. Geophys-Atm. Hydr., 18, 687–705, 2000.
Sakshaug, E.: Biomass and productivity distributions and their variability in the Barents Sea, ICES J. Mar. Sci., 54, 341–350, 1997.
Sakshaug, E.: Primary and secondary production in the Arctic Seas, in: The organic carbon cycle in the Arctic Ocean, editd by: Stein, R. and Macdonald, R. W., Springer, New York, 57–81, 2004.
Sakshaug, E. and Slagstad, D.: Light and Productivity of Phytoplankton in Polar Marine Ecosystems – a Physiological View, Polar Res., 10, 69–85, 1991.
Sakshaug, E., Bjorge, A., Gulliksen, B., Loeng, H., and Mehlum, F.: Structure, Biomass Distribution, and Energetics of the Pelagic Ecosystem in the Barents Sea – a Synopsis, Polar Biol., 14, 405–411, 1994.
Schlichtholz, P. and Houssais, M. N.: An overview of the theta-S correlations in Fram Strait based on the MIZEX 84 data, Oceanologia, 44, 243–272, 2002.
Seuthe, L., Topper, B., Reigstad, M., Thyrhaug, R., and Vaquer-Sunyer, R.: Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75–80° N) during the vernal pre-bloom phase, Aquat. Microb. Ecol., 64, 253–266, 2011.
Sherr, B. F. and Sherr, E. B.: Community respiration/production and bacterial activity in the upper water column of the central Arctic Ocean, Deep-Sea Res. I, 50, 529–542, 2003.
Sokolova, S. A. and Solovyeva, A. A.: Primary Production in Dalnezelenetskaya Bay (Murman Coast) in 1967, Oceanology-USSR, 11, 386–395, 1971.
Sondergaard, M., Stedmon, C. A., and Borch, N. H.: Fate of terrigenous dissolved organic matter (DOM) in estuaries: Aggregation and bioavailability, Ophelia, 57, 161–176, 2003.
Spencer, R. G. M., Aiken, G. R., Butler, K. D., Dornblaser, M. M., Striegl, R. G., and Hernes, P. J.: Utilizing chromophoric dissolved organic matter measurements to derive export and reactivity of dissolved organic carbon exported to the Arctic Ocean: A case study of the Yukon River, Alaska, Geophys. Res. Lett., 36, L06401, https://doi.org/10.1029/2008GL036831, 2009.
Subba Rao, D. V. and Platt, T.: Primary Production of Arctic Waters, Polar Biol., 3, 191–201, 1984.
Tovar-Sanchez, A., Duarte, C. M., Alonso, J. C., Lacorte, S., Tauler, R., and Galban-Malagon, C.: Impacts of metals and nutrients released from melting multiyear Arctic sea ice, J. Geophys. Res.-Oceans, 115, C07003, https://doi.org/10.1029/2009JC005685, 2010.
Trenberth, K. E., Jones, P. D., Ambenje, P., Bojariu, R., Easterling, D., Tank, A. K., Parker, D., Rahimzadeh, F., Renwick, J. A., Rusticucci, M., Soden, B., and Zhai, P.: Observations: Surface and Atmospheric Climate Change, in: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Solomon, S., Qin, D., Manning, M. , Chen, Z., Marquis, M., Averyt, K. B., Tignor, M., and Miller, H. L., Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 235–336, 2007.
van Dongen, B. E., Zencak, Z., and Gustafsson, O.: Differential transport and degradation of bulk organic carbon and specific terrestrial biomarkers in the surface waters of a sub-arctic brackish bay mixing zone, Mar. Chem., 112, 203–214, 2008.
Vaquer-Sunyer, R., Duarte, C. M., Santiago, R., Wassmann, P., and Reigstad, M.: Experimental evaluation of planktonic respiration response to warming in the European Arctic Sector, Polar Biol., 33, 1661–1671, 2010.
von Quillfeldt, C. H.: Distribution of diatoms in the Northeast Water Polynya, Greenland, J. Marine Syst., 10, 211–240, 1997.
von Quillfeldt, C. H.: Common diatom species in arctic spring blooms: Their distribution and abundance, Bot. Mar., 43, 499–516, 2000.
Walsh, J. E.: Climate of the arctic marine environment, Ecol. Appl., 18, S3–S22, 2008.
Wassmann, P.: Vernal export and retention of biogenic matter in the north-eastern North Atlantic and adjacent Arctic Ocean: the role of the Norwegian Atlantic Current and topography, Mem. Natl. Inst. Polar Res., 54, 377–392, 2001.
Wassmann, P., Bauerfeind, E., Fortier, M., Fukuchi, M., Hargrave, b., Moran, B., Noji, T., Nothig, E. M., Olli, K., Peinert, R., Sasaki, H., and Shevchenko, V. P.: Particulate organic Carbon flux to the Arctic Ocean sea floor, in: The Organic Carbon cycle in the Arctic Ocean, edited by: Stein, R. and Macdonald, R. W., Springer-Verlag Berlin Heidelberg New York, 101–138, 2004.
Wassmann, P., Slagstad, D., Riser, C. W., and Reigstad, M.: Modelling the ecosystem dynamics of the Barents Sea including the marginal ice zone II, Carbon flux and interannual variability, J. Marine Syst., 59, 1–24, 2006a.
Wassmann, P., Reigstad, M., Haug, T., Rudels, B., Carroll, M. L., Hop, H., Gabrielsen, G. W., Falk-Petersen, S., Denisenko, S. G., Arashkevich, E., Slagstad, D., and Pavlova, O.: Food webs and carbon flux in the Barents Sea, Prog. Oceanogr., 71, 232–287, 2006b.
Wassmann, P., Carroll, J., and Bellerby, R. G. J.: Carbon flux and ecosystem feedback in the northern Barents Sea in an era of climate change: An introduction, Deep-Sea Res. II, 55, 2143–2153, 2008.
White, P. A., Kalff, J., Rasmussen, J. B., and Gasol, J. M.: The Effect of Temperature and Algal Biomass on Bacterial Production and Specific Growth-Rate in Fresh-Water and Marine Habitats, Microb. Ecol., 21, 99–118, 1991.
Williams, P. J. B., Raine, R. C. T., and Bryan, J. R.: Agreement between the 14C and Oxygen Methods of Measuring Phytoplankton Production – Reassessment of the Photosynthetic Quotient, Oceanol. Acta, 2, 411–416, 1979.
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