Articles | Volume 13, issue 1
https://doi.org/10.5194/bg-13-115-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/bg-13-115-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Influence of timing of sea ice retreat on phytoplankton size during marginal ice zone bloom period on the Chukchi and Bering shelves
A. Fujiwara
CORRESPONDING AUTHOR
Institute of Arctic Climate and Environment Research,
Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima,
Yokosuka, Kanagawa, Japan
T. Hirawake
Faculty/Graduate School of Fisheries Sciences, Hokkaido
University, 3-1-1 Minatocho, Hakodate, Hokkaido 041-8611,
Japan
K. Suzuki
Faculty of Environmental Earth Science, Hokkaido
University/JST-CREST, N10 W5, Kita-ku, Sapporo, Hokkaido 060-0810,
Japan
L. Eisner
NOAA-Fisheries, Alaska Fisheries Science Center, National Marine Fisheries Service, 7600 Sand Point Way, Seattle WA, USA
I. Imai
Faculty/Graduate School of Fisheries Sciences, Hokkaido
University, 3-1-1 Minatocho, Hakodate, Hokkaido 041-8611,
Japan
S. Nishino
Institute of Arctic Climate and Environment Research,
Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima,
Yokosuka, Kanagawa, Japan
T. Kikuchi
Institute of Arctic Climate and Environment Research,
Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima,
Yokosuka, Kanagawa, Japan
S.-I. Saitoh
Faculty/Graduate School of Fisheries Sciences, Hokkaido
University, 3-1-1 Minatocho, Hakodate, Hokkaido 041-8611,
Japan
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We constructed the habitat models explaining the spatial patterns of the large and small Arctic copepods and the Pacific copepods of the northern Bering Sea and Chukchi Sea. The adequate models show the importance of water masses and sea ice retreat timing. This finding also indicates that earlier sea ice retreat has positive effects on the abundance of all copepod groups in the northern Bering and Chukchi seas, suggesting a change from a pelagic–benthic-type ecosystem to a pelagic–pelagic type.
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We analysed mooring and ship-based data obtained from a biological hotspot in the southern Chukchi Sea. Mooring data were collected for the first time in this site and were captured during spring and autumn blooms with high chlorophyll a concentrations. The data suggest that a dome-like structure of the bottom water and nutrient regeneration at the bottom play important roles in maintaining the autumn bloom of the biological hotspot.
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Biogeosciences, 14, 5727–5739, https://doi.org/10.5194/bg-14-5727-2017, https://doi.org/10.5194/bg-14-5727-2017, 2017
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Takafumi Hirata and Koji Suzuki
Biogeosciences Discuss., https://doi.org/10.5194/bg-2017-164, https://doi.org/10.5194/bg-2017-164, 2017
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Biogeosciences, 10, 7207–7217, https://doi.org/10.5194/bg-10-7207-2013, https://doi.org/10.5194/bg-10-7207-2013, 2013
K. Sugie, H. Endo, K. Suzuki, J. Nishioka, H. Kiyosawa, and T. Yoshimura
Biogeosciences, 10, 6309–6321, https://doi.org/10.5194/bg-10-6309-2013, https://doi.org/10.5194/bg-10-6309-2013, 2013
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Biogeosciences, 10, 5977–5996, https://doi.org/10.5194/bg-10-5977-2013, https://doi.org/10.5194/bg-10-5977-2013, 2013
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Biogeosciences Discuss., https://doi.org/10.5194/bgd-10-6605-2013, https://doi.org/10.5194/bgd-10-6605-2013, 2013
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Reviews and syntheses: expanding the global coverage of gross primary production and net community production measurements using Biogeochemical-Argo floats
Characteristics of surface physical and biogeochemical parameters within mesoscale eddies in the Southern Ocean
Phosphomonoesterase and phosphodiesterase activities in the Eastern Mediterranean Sea during stratified versus mixed conditions
Seasonal dynamics and annual budget of dissolved inorganic carbon in the northwestern Mediterranean deep-convection region
The fingerprint of climate variability on the surface ocean cycling of iron and its isotopes
Reconstructing the ocean's mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralization
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Absence of photophysiological response to iron addition in autumn phytoplankton in the Antarctic sea-ice zone
Optimal parameters for the ocean's nutrient, carbon, and oxygen cycles compensate for circulation biases but replumb the biological pump
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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
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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.
France Van Wambeke, Pascal Conan, Mireille Pujo-Pay, Vincent Taillandier, Olivier Crispi, and Elvira Pulido-Villena
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Distribution of phosphomonoesterase (PME) and phosphodiesterase (PDE) activities over the epipelagic zone are described in the eastern Mediterranean Sea, in winter and spring. The type of concentration kinetics obtained for PDE (saturation at 50 µM, high Km, high turnovertimes) compared to those of PME (saturation at 1 µM, low Km, low turnovertimes) are discussed in regard to possible inequal distribution of PDE and PME among organic material size continuum, and accessibility to phosphodiesters.
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
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Daniela König and Alessandro Tagliabue
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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
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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.
Nicole M. Travis, Colette L. Kelly, and Karen L. Casciotti
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-64, https://doi.org/10.5194/bg-2023-64, 2023
Revised manuscript accepted for BG
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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.
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.
Jenny Hieronymus, Magnus Hieronymus, Matthias Gröger, Jörg Schwinger, Raffaele Bernadello, Etienne Tourigny, Valentina Sicardi, Itzel Ruvalcaba Baroni, and Klaus Wyser
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-54, https://doi.org/10.5194/bg-2023-54, 2023
Revised manuscript accepted for BG
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Changes in the seasonality of primary production has been examined using daily data from two earth system models covering the period 1750–2100. The daily data made it possible to detect shifts in the day of the year during which the net primary production reaches its peak value. It was found that the day of peak primary production occurs earlier and earlier during the 21st century and that a major change in the time series occurs in the beginning of the 21st century.
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.
Zuozhu Wen, Thomas J. Browning, Rongbo Dai, Wenwei Wu, Weiying Li, Xiaohua Hu, Wenfang Lin, Lifang Wang, Xin Liu, Zhimian Cao, Haizheng Hong, and Dalin Shi
Biogeosciences, 19, 5237–5250, https://doi.org/10.5194/bg-19-5237-2022, https://doi.org/10.5194/bg-19-5237-2022, 2022
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Fe and P are key factors controlling the biogeography and activity of marine N2-fixing microorganisms. We found lower abundance and activity of N2 fixers in the northern South China Sea than around the western boundary of the North Pacific, and N2 fixation rates switched from Fe–P co-limitation to P limitation. We hypothesize the Fe supply rates and Fe utilization strategies of each N2 fixer are important in regulating spatial variability in community structure across the study area.
Claudia Eisenring, Sophy E. Oliver, Samar Khatiwala, and Gregory F. de Souza
Biogeosciences, 19, 5079–5106, https://doi.org/10.5194/bg-19-5079-2022, https://doi.org/10.5194/bg-19-5079-2022, 2022
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Given the sparsity of observational constraints on micronutrients such as zinc (Zn), we assess the sensitivities of a framework for objective parameter optimisation in an oceanic Zn cycling model. Our ensemble of optimisations towards synthetic data with varying kinds of uncertainty shows that deficiencies related to model complexity and the choice of the misfit function generally have a greater impact on the retrieval of model Zn uptake behaviour than does the limitation of data coverage.
Yoshikazu Sasai, Sherwood Lan Smith, Eko Siswanto, Hideharu Sasaki, and Masami Nonaka
Biogeosciences, 19, 4865–4882, https://doi.org/10.5194/bg-19-4865-2022, https://doi.org/10.5194/bg-19-4865-2022, 2022
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We have investigated the adaptive response of phytoplankton growth to changing light, nutrients, and temperature over the North Pacific using two physical-biological models. We compare modeled chlorophyll and primary production from an inflexible control model (InFlexPFT), which assumes fixed carbon (C):nitrogen (N):chlorophyll (Chl) ratios, to a recently developed flexible phytoplankton functional type model (FlexPFT), which incorporates photoacclimation and variable C:N:Chl ratios.
Jens Terhaar, Thomas L. Frölicher, and Fortunat Joos
Biogeosciences, 19, 4431–4457, https://doi.org/10.5194/bg-19-4431-2022, https://doi.org/10.5194/bg-19-4431-2022, 2022
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Estimates of the ocean sink of anthropogenic carbon vary across various approaches. We show that the global ocean carbon sink can be estimated by three parameters, two of which approximate the ocean ventilation in the Southern Ocean and the North Atlantic, and one of which approximates the chemical capacity of the ocean to take up carbon. With observations of these parameters, we estimate that the global ocean carbon sink is 10 % larger than previously assumed, and we cut uncertainties in half.
Natasha René van Horsten, Hélène Planquette, Géraldine Sarthou, Thomas James Ryan-Keogh, Nolwenn Lemaitre, Thato Nicholas Mtshali, Alakendra Roychoudhury, and Eva Bucciarelli
Biogeosciences, 19, 3209–3224, https://doi.org/10.5194/bg-19-3209-2022, https://doi.org/10.5194/bg-19-3209-2022, 2022
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The remineralisation proxy, barite, was measured along 30°E in the southern Indian Ocean during early austral winter. To our knowledge this is the first reported Southern Ocean winter study. Concentrations throughout the water column were comparable to observations during spring to autumn. By linking satellite primary production to this proxy a possible annual timescale is proposed. These findings also suggest possible carbon remineralisation from satellite data on a basin scale.
Zhibo Shao and Ya-Wei Luo
Biogeosciences, 19, 2939–2952, https://doi.org/10.5194/bg-19-2939-2022, https://doi.org/10.5194/bg-19-2939-2022, 2022
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Non-cyanobacterial diazotrophs (NCDs) may be an important player in fixing N2 in the ocean. By conducting meta-analyses, we found that a representative marine NCD phylotype, Gamma A, tends to inhabit ocean environments with high productivity, low iron concentration and high light intensity. It also appears to be more abundant inside cyclonic eddies. Our study suggests a niche differentiation of NCDs from cyanobacterial diazotrophs as the latter prefers low-productivity and high-iron oceans.
Coraline Leseurre, Claire Lo Monaco, Gilles Reverdin, Nicolas Metzl, Jonathan Fin, Claude Mignon, and Léa Benito
Biogeosciences, 19, 2599–2625, https://doi.org/10.5194/bg-19-2599-2022, https://doi.org/10.5194/bg-19-2599-2022, 2022
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Decadal trends of fugacity of CO2 (fCO2), total alkalinity (AT), total carbon (CT) and pH in surface waters are investigated in different domains of the southern Indian Ocean (45°S–57°S) from ongoing and station observations regularly conducted in summer over the period 1998–2019. The fCO2 increase and pH decrease are mainly driven by anthropogenic CO2 estimated just below the summer mixed layer, as well as by a warming south of the polar front or in the fertilized waters near Kerguelen Island.
Priscilla Le Mézo, Jérôme Guiet, Kim Scherrer, Daniele Bianchi, and Eric Galbraith
Biogeosciences, 19, 2537–2555, https://doi.org/10.5194/bg-19-2537-2022, https://doi.org/10.5194/bg-19-2537-2022, 2022
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This study quantifies the role of commercially targeted fish biomass in the cycling of three important nutrients (N, P, and Fe), relative to nutrients otherwise available in water and to nutrients required by primary producers, and the impact of fishing. We use a model of commercially targeted fish biomass constrained by fish catch and stock assessment data to assess the contributions of fish at the global scale, at the time of the global peak catch and prior to industrial fishing.
Rebecca Chmiel, Nathan Lanning, Allison Laubach, Jong-Mi Lee, Jessica Fitzsimmons, Mariko Hatta, William Jenkins, Phoebe Lam, Matthew McIlvin, Alessandro Tagliabue, and Mak Saito
Biogeosciences, 19, 2365–2395, https://doi.org/10.5194/bg-19-2365-2022, https://doi.org/10.5194/bg-19-2365-2022, 2022
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Dissolved cobalt is present in trace amounts in seawater and is a necessary nutrient for marine microbes. On a transect from the Alaskan coast to Tahiti, we measured seawater concentrations of dissolved cobalt. Here, we describe several interesting features of the Pacific cobalt cycle including cobalt sources along the Alaskan coast and Hawaiian vents, deep-ocean particle formation, cobalt activity in low-oxygen regions, and how our samples compare to a global biogeochemical model’s predictions.
Nicolas Metzl, Claire Lo Monaco, Coraline Leseurre, Céline Ridame, Jonathan Fin, Claude Mignon, Marion Gehlen, and Thi Tuyet Trang Chau
Biogeosciences, 19, 1451–1468, https://doi.org/10.5194/bg-19-1451-2022, https://doi.org/10.5194/bg-19-1451-2022, 2022
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During an oceanographic cruise conducted in January 2020 in the south-western Indian Ocean, we observed very low CO2 concentrations associated with a strong phytoplankton bloom that occurred south-east of Madagascar. This biological event led to a strong regional CO2 ocean sink not previously observed.
Darren R. Clark, Andrew P. Rees, Charissa M. Ferrera, Lisa Al-Moosawi, Paul J. Somerfield, Carolyn Harris, Graham D. Quartly, Stephen Goult, Glen Tarran, and Gennadi Lessin
Biogeosciences, 19, 1355–1376, https://doi.org/10.5194/bg-19-1355-2022, https://doi.org/10.5194/bg-19-1355-2022, 2022
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Measurements of microbial processes were made in the sunlit open ocean during a research cruise (AMT19) between the UK and Chile. These help us to understand how microbial communities maintain the function of remote ecosystems. We find that the nitrogen cycling microbes which produce nitrite respond to changes in the environment. Our insights will aid the development of models that aim to replicate and ultimately project how marine environments may respond to ongoing climate change.
Martí Galí, Marcus Falls, Hervé Claustre, Olivier Aumont, and Raffaele Bernardello
Biogeosciences, 19, 1245–1275, https://doi.org/10.5194/bg-19-1245-2022, https://doi.org/10.5194/bg-19-1245-2022, 2022
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Part of the organic matter produced by plankton in the upper ocean is exported to the deep ocean. This process, known as the biological carbon pump, is key for the regulation of atmospheric carbon dioxide and global climate. However, the dynamics of organic particles below the upper ocean layer are not well understood. Here we compared the measurements acquired by autonomous robots in the top 1000 m of the ocean to a numerical model, which can help improve future climate projections.
Marie Barbieux, Julia Uitz, Alexandre Mignot, Collin Roesler, Hervé Claustre, Bernard Gentili, Vincent Taillandier, Fabrizio D'Ortenzio, Hubert Loisel, Antoine Poteau, Edouard Leymarie, Christophe Penkerc'h, Catherine Schmechtig, and Annick Bricaud
Biogeosciences, 19, 1165–1194, https://doi.org/10.5194/bg-19-1165-2022, https://doi.org/10.5194/bg-19-1165-2022, 2022
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This study assesses marine biological production in two Mediterranean systems representative of vast desert-like (oligotrophic) areas encountered in the global ocean. We use a novel approach based on non-intrusive high-frequency in situ measurements by two profiling robots, the BioGeoChemical-Argo (BGC-Argo) floats. Our results indicate substantial yet variable production rates and contribution to the whole water column of the subsurface layer, typically considered steady and non-productive.
Filippa Fransner, Friederike Fröb, Jerry Tjiputra, Nadine Goris, Siv K. Lauvset, Ingunn Skjelvan, Emil Jeansson, Abdirahman Omar, Melissa Chierici, Elizabeth Jones, Agneta Fransson, Sólveig R. Ólafsdóttir, Truls Johannessen, and Are Olsen
Biogeosciences, 19, 979–1012, https://doi.org/10.5194/bg-19-979-2022, https://doi.org/10.5194/bg-19-979-2022, 2022
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Ocean acidification, a direct consequence of the CO2 release by human activities, is a serious threat to marine ecosystems. In this study, we conduct a detailed investigation of the acidification of the Nordic Seas, from 1850 to 2100, by using a large set of samples taken during research cruises together with numerical model simulations. We estimate the effects of changes in different environmental factors on the rate of acidification and its potential effects on cold-water corals.
Guorong Zhong, Xuegang Li, Jinming Song, Baoxiao Qu, Fan Wang, Yanjun Wang, Bin Zhang, Xiaoxia Sun, Wuchang Zhang, Zhenyan Wang, Jun Ma, Huamao Yuan, and Liqin Duan
Biogeosciences, 19, 845–859, https://doi.org/10.5194/bg-19-845-2022, https://doi.org/10.5194/bg-19-845-2022, 2022
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A predictor selection algorithm was constructed to decrease the predicting error in the surface ocean partial pressure of CO2 (pCO2) mapping by finding better combinations of pCO2 predictors in different regions. Compared with previous research using the same combination of predictors in all regions, using different predictors selected by the algorithm in different regions can effectively decrease pCO2 predicting errors.
Shantelle Smith, Katye E. Altieri, Mhlangabezi Mdutyana, David R. Walker, Ruan G. Parrott, Sedick Gallie, Kurt A. M. Spence, Jessica M. Burger, and Sarah E. Fawcett
Biogeosciences, 19, 715–741, https://doi.org/10.5194/bg-19-715-2022, https://doi.org/10.5194/bg-19-715-2022, 2022
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Ammonium is a crucial yet poorly understood component of the Southern Ocean nitrogen cycle. We attribute our finding of consistently high ammonium concentrations in the winter mixed layer to limited ammonium consumption and sustained ammonium production, conditions under which the Southern Ocean becomes a source of carbon dioxide to the atmosphere. From similar data collected over an annual cycle, we propose a seasonal cycle for ammonium in shallow polar waters – a first for the Southern Ocean.
Jannes Koelling, Dariia Atamanchuk, Johannes Karstensen, Patricia Handmann, and Douglas W. R. Wallace
Biogeosciences, 19, 437–454, https://doi.org/10.5194/bg-19-437-2022, https://doi.org/10.5194/bg-19-437-2022, 2022
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In this study, we investigate oxygen variability in the deep western boundary current in the Labrador Sea from multiyear moored records. We estimate that about half of the oxygen taken up in the interior Labrador Sea by air–sea gas exchange during deep water formation is exported southward the same year. Our results underline the complexity of the oxygen uptake and export in the Labrador Sea and highlight the important role this region plays in supplying oxygen to the deep ocean.
Céline Ridame, Julie Dinasquet, Søren Hallstrøm, Estelle Bigeard, Lasse Riemann, France Van Wambeke, Matthieu Bressac, Elvira Pulido-Villena, Vincent Taillandier, Fréderic Gazeau, Antonio Tovar-Sanchez, Anne-Claire Baudoux, and Cécile Guieu
Biogeosciences, 19, 415–435, https://doi.org/10.5194/bg-19-415-2022, https://doi.org/10.5194/bg-19-415-2022, 2022
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We show that in the Mediterranean Sea spatial variability in N2 fixation is related to the diazotrophic community composition reflecting different nutrient requirements among species. Nutrient supply by Saharan dust is of great importance to diazotrophs, as shown by the strong stimulation of N2 fixation after a simulated dust event under present and future climate conditions; the magnitude of stimulation depends on the degree of limitation related to the diazotrophic community composition.
Matthew P. Humphreys, Erik H. Meesters, Henk de Haas, Szabina Karancz, Louise Delaigue, Karel Bakker, Gerard Duineveld, Siham de Goeyse, Andreas F. Haas, Furu Mienis, Sharyn Ossebaar, and Fleur C. van Duyl
Biogeosciences, 19, 347–358, https://doi.org/10.5194/bg-19-347-2022, https://doi.org/10.5194/bg-19-347-2022, 2022
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A series of submarine sinkholes were recently discovered on Luymes Bank, part of Saba Bank, a carbonate platform in the Caribbean Netherlands. Here, we investigate the waters inside these sinkholes for the first time. One of the sinkholes contained a body of dense, low-oxygen and low-pH water, which we call the
acid lake. We use measurements of seawater chemistry to work out what processes were responsible for forming the acid lake and discuss the consequences for the carbonate platform.
Gerhard Fischer, Oscar E. Romero, Johannes Karstensen, Karl-Heinz Baumann, Nasrollah Moradi, Morten Iversen, Götz Ruhland, Marco Klann, and Arne Körtzinger
Biogeosciences, 18, 6479–6500, https://doi.org/10.5194/bg-18-6479-2021, https://doi.org/10.5194/bg-18-6479-2021, 2021
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Low-oxygen eddies in the eastern subtropical North Atlantic can form an oasis for phytoplankton growth. Here we report on particle flux dynamics at the oligotrophic Cape Verde Ocean Observatory. We observed consistent flux patterns during the passages of low-oxygen eddies. We found distinct flux peaks in late winter, clearly exceeding background fluxes. Our findings suggest that the low-oxygen eddies sequester higher organic carbon than expected for oligotrophic settings.
Matthieu Bressac, Thibaut Wagener, Nathalie Leblond, Antonio Tovar-Sánchez, Céline Ridame, Vincent Taillandier, Samuel Albani, Sophie Guasco, Aurélie Dufour, Stéphanie H. M. Jacquet, François Dulac, Karine Desboeufs, and Cécile Guieu
Biogeosciences, 18, 6435–6453, https://doi.org/10.5194/bg-18-6435-2021, https://doi.org/10.5194/bg-18-6435-2021, 2021
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Phytoplankton growth is limited by the availability of iron in about 50 % of the ocean. Atmospheric deposition of desert dust represents a key source of iron. Here, we present direct observations of dust deposition in the Mediterranean Sea. A key finding is that the input of iron from dust primarily occurred in the deep ocean, while previous studies mainly focused on the ocean surface. This new insight will enable us to better represent controls on global marine productivity in models.
Cited articles
Alexander, V. and Niebauer, H.: Oceanography of the eastern Bering Sea
ice-edge zone in spring, Limnol. Oceanogr., 26, 1111–1125, 1981.
Alvain, S., Moulin, C., Dandonneau, Y. and Bréon, F.: Remote sensing of
phytoplankton groups in case 1 waters from global SeaWiFS imagery, Deep-Sea
Res. Pt. I, 52, 1989–2004, https://doi.org/10.1016/j.dsr.2005.06.015, 2005.
Ardyna, M., Babin, M., Gosselin, M., Devred, E., Bélanger, S., Matsuoka,
A. and Tremblay, J.-É.: Parameterization of vertical chlorophyll a in
the Arctic Ocean: impact of the subsurface chlorophyll maximum on regional,
seasonal, and annual primary production estimates, Biogeosciences, 10,
4383–4404, https://doi.org/10.5194/bg-10-4383-2013, 2013.
Arrigo, K. R. and Van Dijken, G. L.: Secular trends in Arctic Ocean net
primary production, J. Geophys. Res., 116(C), C09011,
https://doi.org/10.1029/2011JC007151, 2011.
Arrigo, K. R., Matrai, P. A. and Van Dijken, G. L.: Primary productivity in
the Arctic Ocean: Impacts of complex optical properties and subsurface
chlorophyll maxima on large-scale estimates, J. Geophys. Res., 116(C11),
https://doi.org/10.1029/2011JC007273, 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.
Arrigo, K. R., Perovich, D. K., Pickart, R. S., Brown, Z. W., Van Dijken, G.
L., Lowry, K. E., Mills, M. M., Palmer, M. A., Balch, W. M., Bahr, F., Bates,
N. R., Benitez-Nelson, C., Bowler, B., Brownlee, E., Ehn, J. K., Frey, K. E.,
Garley, R., Laney, S. R., Lubelczyk, L., Mathis, J., Matsuoka, A., Mitchell,
B. G., Moore, G. W. K., Ortega-Retuerta, E., Pal, S., Polashenski, C. M.,
Reynolds, R. A., Schieber, B., Sosik, H. M., Stephens, M., and Swift, J. H.:
Massive Phytoplankton Blooms Under Arctic Sea Ice, Science, 336, 1408–1408,
https://doi.org/10.1126/science.1215065, 2012.
Behrenfeld, M. J. and Falkowski, P. G.: Photosynthetic rates derived from
satellite-based chlorophyll concentration, Limnol. Oceanogr., 42, 1–20,
https://doi.org/10.4319/lo.1997.42.1.0001, 1997.
Brewin, R. J. W., Sathyendranath, S., Hirata, T., Lavender, S. J., Barciela,
R. M., and Hardman-Mountford, N. J.: A three-component model of phytoplankton
size class for the Atlantic Ocean, Ecol. Model., 221, 1472–1483,
https://doi.org/10.1016/j.ecolmodel.2010.02.014, 2010.
Brock, T. D.: Calculating Solar Radiation for Ecological Studies, Ecol.
Model., 14, 1–19, https://doi.org/10.1016/0304-3800(81)90011-9, 1981.
Brown, Z. W. and Arrigo, K. R.: Sea ice impacts on spring bloom dynamics and
net primary production in the Eastern Bering Sea, J. Geophys. Res.-Oceans,
118, 43–62, https://doi.org/10.1029/2012JC008034, 2013.
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.
Brown, Z. W., Lowry, K. E., Palmer, M. A., Van Dijken, G. L., Mills, M. M.,
Pickart, R. S. and Arrigo, K. R.: Characterizing the subsurface chlorophyll a
maximum in the Chukchi Sea and Canada Basin, Deep-Sea Res. Pt. II, 118,
https://doi.org/10.1016/j.dsr2.2015.02.010, 2015.
Codispoti, L. A., Flagg, C., Kelly, V., and Swift, J. H.: Hydrographic
conditions during the 2002 SBI process experiments, Deep-Sea Res. Pt. II, 52,
3199–3226, https://doi.org/10.1016/j.dsr2.2005.10.007, 2005.
Comiso, J. C., Parkinson, C. L., Gersten, R., and Stock, L.: Accelerated
decline in the Arctic sea ice cover, Geophys. Res. Lett., 35, L01703,
https://doi.org/10.1029/2007GL031972, 2008.
Cota, G., Wang, J., and Comiso, J.: Transformation of global satellite
chlorophyll retrievals with a regionally tuned algorithm, Remote Sens.
Environ., 90, 373–377, https://doi.org/10.1016/j.rse.2004.01.005, 2004.
Coyle, K. O., Pinchuk, A. I., Eisner, L. B., and Napp, J. M.: Zooplankton
species composition, abundance and biomass on the eastern Bering Sea shelf
during summer: The potential role of water-column stability and nutrients in
structuring the zooplankton community, Deep-Sea Res. Pt. II, 55, 1775–1791,
https://doi.org/10.1016/j.dsr2.2008.04.029, 2008.
Eisner, L. B., Gann, J. C., Ladd, C., Cieciel, K., and Mordy, C. W.: Late
summer early fall phytoplankton biomass (chlorophyll a ) in the eastern
Bering Sea: spatial and temporal variations and factors affecting chlorophyll
a concentrations, Deep-Sea Res. Pt. II, in-press.
Eppley, R. W.: Temperature and phytoplankton growth in the sea, Fish Bull,
70, 1063–1085, 1972.
Feder, H. M., Jewett, S. C., and Blanchard, A.: Southeastern Chukchi Sea
(Alaska) epibenthos, Polar Biol., 28, 402–421,
https://doi.org/10.1007/s00300-004-0683-4, 2005.
Fujiwara, A., Hirawake, T., Suzuki, K., and Saitoh, S.-I.: Remote sensing of
size structure of phytoplankton communities using optical properties of the
Chukchi and Bering Sea shelf region, Biogeosciences, 8, 3567–3580,
https://doi.org/10.5194/bg-8-3567-2011, 2011.
Fujiwara, A., Hirawake, T., Suzuki, K., Imai, I., and Saitoh, S.-I.: Timing
of sea ice retreat can alter phytoplankton community structure in the western
Arctic Ocean, Biogeosciences, 11, 1705–1716, https://doi.org/10.5194/bg-11-1705-2014,
2014.
Grebmeier, J. M.: Shifting Patterns of Life in the Pacific Arctic and
Sub-Arctic Seas, Annu. Rev. Mar. Sci., 4, 63–78,
https://doi.org/10.1146/annurev-marine-120710-100926, 2012.
Grebmeier, J. M. and Dunton, K.: Benthic processes in the northern
Bering/Chukchi seas: Status and global change, in: Impacts of changes in sea
ice and other environmental parameters in the Arctic, edited by: Huntington,
H. P., Report of the Marine Mammal Commission Workshop, Girdwood, Alaska,
61–71, 2000.
Grebmeier, J. M., McRoy, C., and Feder, H.: Pelagic-benthic coupling on the
shelf of the northern Bering and Chukchi seas. 1. Food supply source and
benthic biomass, Mar. Ecol.-Prog. Ser., 48, 57–67, 1988.
Grebmeier, J. M., Cooper, L. W., Feder, H. M., and Sirenko, B. I.: Ecosystem
Dynamics of the Pacific-Influenced Northern Bering and Chukchi Seas, Prog.
Oceanogr., 71, 331–361, https://doi.org/10.1016/j.pocean.2006.10.001, 2006a.
Grebmeier, J. M., Overland, J. E., Moore, S. E., Farley, E. V., Carmack, E.
C., Cooper, L. W., Frey, K. E., Helle, J. H., McLaughlin, F. A., and McNutt,
S. L.: A Major Ecosystem Shift in the Northern Bering Sea, Science, 311,
1461–1464, https://doi.org/10.1126/science.1121365, 2006b.
Grebmeier, J. M., Moore, S., and Overland, J.: Biological response to recent
Pacific Arctic sea ice retreats, Eos Trans., 91, 161–162, 2010.
Hama, T., Miyazaki, T., Ogawa, Y., Iwakuma, T., Takahashi, M., Otsuki, A. and
Ichimura, S.: Measurement of photosynthetic production of a marine
phytoplankton population using a stable 13 C isotope, Marine Biology, 73,
31–36, https://doi.org/10.1007/BF00396282, 1983.
Hill, V., Cota, G., and Stockwell, D.: Spring and summer phytoplankton
communities in the Chukchi and Eastern Beaufort Seas, Deep-Sea Res. Pt. II,
52, 3369–3385, https://doi.org/10.1016/j.dsr2.2005.10.010, 2005.
Hill, V. J., Matrai, P. A., Olson, E., Suttles, S., Steele, M., Codispoti, L.
A., and Zimmerman, R. C.: Synthesis of integrated primary production in the
Arctic Ocean: II. In situ and remotely sensed estimates, Prog. Oceanogr.,
110, 107–125, https://doi.org/10.1016/j.pocean.2012.11.005, 2013.
Hirata, T., Hardman-Mountford, N. J., Brewin, R. J. W., Aiken, J., Barlow,
R., Suzuki, K., Isada, T., Howell, E., Hashioka, T., Noguchi-Aita, M., and
Yamanaka, Y.: Synoptic relationships between surface Chlorophyll-a and
diagnostic pigments specific to phytoplankton functional types,
Biogeosciences, 8, 311–327, https://doi.org/10.5194/bg-8-311-2011, 2011.
Hirata, T., Saux-Picart, S., Hashioka, T., Aita-Noguchi, M., Sumata, H.,
Shigemitsu, M., Allen, J. I., and Yamanaka, Y.: A comparison between
phytoplankton community structures derived from a global 3D ecosystem model
and satellite observation, J. Mar. Syst., 109–110, 129–137,
https://doi.org/10.1016/j.jmarsys.2012.01.009, 2013.
Hirawake, T., Takao, S., Horimoto, N., Ishimaru, T., Yamaguchi, Y., and
Fukuchi, M.: A phytoplankton absorption-based primary productivity model for
remote sensing in the Southern Ocean, Polar Biol., 34, 291–302,
https://doi.org/10.1007/s00300-010-0949-y, 2011.
Hirawake, T., Shinmyo, K., Fujiwara, A., and Saitoh, S.-I.: Satellite remote
sensing of primary productivity in the Bering and Chukchi Seas using an
absorption-based approach, ICES J. Mar. Sci., 69, 1194–1204,
https://doi.org/10.1093/icesjms/fss111, 2012.
Hunt, G. L., Jr, Stabeno, P., Walters, G., Sinclair, E., Brodeur, R. D.,
Napp, J. M., and Bond, N. A.: Climate change and control of the southeastern
Bering Sea pelagic ecosystem, Deep-Sea Res. Pt. II, 49, 5821–5853,
https://doi.org/10.1016/S0967-0645(02)00321-1, 2002.
Hunt, G. L., Jr, Coyle, K. O., Eisner, L. B., Farley, E. V., Heintz, R. A.,
Mueter, F., Napp, J. M., Overland, J. E., Ressler, P. H., Salo, S., and
Stabeno, P. J.: Climate impacts on eastern Bering Sea foodwebs: a synthesis
of new data and an assessment of the Oscillating Control Hypothesis, ICES J.
Mar. Sci., 68, 1230–1243, https://doi.org/10.1093/icesjms/fsr036, 2011.
Itoh, M.: R/V Mirai Cruise Report MR10-05, 246pp., JAMSTEC,
Yokosuka, Japan, 2010.
Ji, R., Jin, M., and Varpe, Ø.: Sea ice phenology and timing of primary
production pulses ub the Arctic Ocean, Glob. Change Biol., 19, 734–741,
https://doi.org/10.1111/gcb.12074, 2013.
Kahru, M., Brotas, V., Manzano-Sarabia, M., and Mitchell, B. G.: Are
phytoplankton blooms occurring earlier in the Arctic? Glob. Change Biol., 17,
1733–1739, https://doi.org/10.1111/j.1365-2486.2010.02312.x, 2011.
Kalnay, E., Kanamitsu, M., Kistler, R., Collins, W., Deaven, D., Gandin, L.,
Iredell, M., Saha, S., White, G., Woollen, J., Zhu, Y., Leetmaa, A.,
Reynolds, R., Chelliah, M., Ebisuzaki, W., Higgins, W., Janowiak, J., Mo, K.
C., Ropelewski, C., Wang, J., Jenne, R., and Joseph, D.: The NCEP/NCAR
40-Year Reanalysis Project, B. Am. Meteor. Soc., 77, 437–471,
https://doi.org/10.1175/1520-0477(1996)077< 0437:TNYRP> 2.0.CO;2,
1996.
Kostadinov, T. S., Siegel, D. A., and Maritorena, S.: Retrieval of the
particle size distribution from satellite ocean color observations, J.
Geophys. Res., 114, C09015, https://doi.org/10.1029/2009JC005303, 2009.
Lee, Z., Carder, K., and Arnone, R.: Deriving inherent optical properties
from water color: a multiband quasi-analytical algorithm for optically deep
waters, Appl. Opt., 41, 5755–5772, https://doi.org/10.1364/AO.41.005755, 2002.
Lee, Z., Weidemann, A., Kindle, J., Arnone, R., Carder, K., and Davis, C.:
Euphotic zone depth: Its derivation and implication to ocean-color remote
sensing, J. Geophys. Res., 112, C03009, https://doi.org/10.1029/2006JC003802, 2007.
Lee, Z., Lubac, B., Werdell, J., and Arnone, R.: An Update of the
Quasi-Analytical Algorithm (QAA_v5), 1–9, available at:
https://doi.org/http://www.ioccg.org/groups/Software_OCA/QAA_v5.pdf, 2009.
Leu, E., Søreide, J. E., Hessen, D. O., Falk Petersen, S. and Berge, J.:
Consequences of changing sea-ice cover for primary and secondary producers in
the European Arctic shelf seas: Timing, quantity, and quality, Progress in
Oceanography, 90, 18–32, https://doi.org/10.1016/j.pocean.2011.02.004, 2011.
Lomas, M. W., Moran, S. B., Casey, J. R., Bell, D. W., Tiahlo, M.,
Whitefield, J., Kelly, R. P., Mathis, J. T. and Cokelet, E. D.: Spatial and
seasonal variability of primary production on the Eastern Bering Sea shelf,
Deep-Sea Res. Pt. II, 65–70, 126–140, https://doi.org/10.1016/j.dsr2.2012.02.010,
2012.
Lowry, K. E., Van Dijken, G. L., and Arrigo, K. R.: Evidence of under-ice
phytoplankton bloom in the Chukchi Sea from 1998–2012, Deep-Sea Res. Pt. II,
105, 105–117, https://doi.org/10.1016/j.dsr2.2014.03.013, 2014.
Markus, T. and Cavalieri, D. J.: An enhancement of the NASA Team sea ice
algorithm, IEEE T. Geosci. Remote, 38, 1387–1398, https://doi.org/10.1109/36.843033,
2000.
Matsuoka, A., Huot, Y., Shimada, K., Saitoh, S.-I., and Babin, M.:
Bio-optical characteristics of the western Arctic Ocean: implications for
ocean color algorithms, Can. J. Remote Sens., 33, 503–518,
https://doi.org/10.5589/m07-059, 2007.
Matsuoka, A., Hill, V., Huot, Y., Babin, M., and Bricaud, A.: Seasonal
variability in the light absorption properties of western Arctic waters:
Parameterization of the individual components of absorption for ocean color
applications, J. Geophys. Res., 116, C02007, https://doi.org/10.1029/2009JC005594,
2011.
Mizobata, K. and Shimada, K.: East–west asymmetry in surface mixed layer and
ocean heat content in the Pacific sector of the Arctic Ocean derived from
AMSR-E sea surface temperature, Deep-Sea Res. Pt. II, 77–80, 62–69,
https://doi.org/10.1016/j.dsr2.2012.04.005, 2012.
Moore, S. E., Grebmeier, J. M., and Davies, J. R.: Gray whale distribution
relative to forage habitat in the northern Bering Sea: current conditions and
retrospective summary, Can. J. Zool., 81, 734–742, https://doi.org/10.1139/z03-043,
2003.
Mouw, C. B. and Yoder, J. A.: Optical determination of phytoplankton size
composition from global SeaWiFS imagery, J. Geophys. Res., 115, C12018,
https://doi.org/10.1029/2010JC006337, 2010.
Mueter, F. J., Broms, C., Drinkwater, K. F., Friedland, K. D., Hare, J. A.,
Hunt, G. L., Jr, Melle, W., and Taylor, M.: Ecosystem responses to recent
oceanographic variability in high-latitude Northern Hemisphere ecosystems,
Prog. Oceanogr., 81, 93–110, https://doi.org/10.1016/j.pocean.2009.04.018, 2009.
Naik, P., D'Sa, E. J., Gomes, H. D. R., Goés, J. I., and Mouw, C. B.:
Light absorption properties of southeastern Bering Sea waters: Analysis,
parameterization and implications for remote sensing, Remote Sens. Environ.,
134, 120–134, https://doi.org/10.1016/j.rse.2013.03.004, 2013.
Niebauer, J. H.: Bio-physical oceanographic interactions at the edge of the
Arctic ice pack, J. Mar. Syst., 2, 209–232,
https://doi.org/10.1016/0924-7963(91)90025-P, 1991.
Niebauer, H. J., Alexander, V. and Henrichs, S. M.: A time-series study of
the spring bloom at the Bering Sea ice edge I. Physical processes,
chlorophyll and nutrient chemistry, Cont. Shelf Res., 15, 1859–1877,
https://doi.org/10.1016/0278-4343(94)00097-7, 1995.
Nishino, S.: R/V Mirai Cruise Report MR13-06, 226pp., JAMSTEC,
Yokosuka, Japan, 2010.
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.
Parsons, T. R., Maita, A., and Lalli, C. M.: 4.3 – Fluorometric
Determination of Chlorophylls, in A Manual of Chemical & Biological
Methods for Seawater Analysis, 107–109, Pergamon, Amsterdam, 1984.
Perovich, D. K. and Richter-Menge, J. A.: Loss of Sea Ice in the Arctic,
Annu. Rev. Mar. Sci., 1, 417–441,
https://doi.org/10.1146/annurev.marine.010908.163805, 2009.
Perrette, M., Yool, A., Quartly, G. D., and Popova, E. E.: Near-ubiquity of
ice-edge blooms in the Arctic, Biogeosciences, 8, 515–524,
https://doi.org/10.5194/bg-8-515-2011, 2011.
Piepenburg, D.: Recent research on Arctic benthos: common notions need to be
revised, Polar Biol., 28, 733–755, https://doi.org/10.1007/s00300-005-0013-5, 2005.
Sambrotto, R. N., Niebauer, H. J., Goering, J. J., and Iverson, R. L.:
Relationships among vertical mixing, nitrate uptake, and phytoplankton growth
during the spring bloom in the southeast Bering Sea middle shelf, Cont. Shelf
Res., 5, 161–198, https://doi.org/10.1016/0278-4343(86)90014-2, 1986.
Sambrotto, R. N., Mordy, C., Zeeman, S. I., Stabeno, P. J., and Macklin, S.
A.: Physical forcing and nutrient conditions associated with patterns of
Chl a and phytoplankton productivity in the southeastern Bering Sea during
summer, Deep-Sea Res. Pt. II, 55, 1745–1760,
https://doi.org/10.1016/j.dsr2.2008.03.003, 2008.
Sheffield, G., Fay, F. H., Feder, H., and Kelly, B. P.: Laboratory digestion
of prey and interpretation of walrus stomach contents, Mar. Mammal Sci., 17,
310–330, https://doi.org/10.1111/j.1748-7692.2001.tb01273.x, 2001.
Shimada, K.: R/V Mirai Cruise Report MR08-04, 158pp., JAMSTEC,
Yokosuka, Japan, 2008.
Sigler, M. F., Stabeno, P. J., Eisner, L. B., Napp, J. M., and Mueter, F. J.:
Spring and fall phytoplankton blooms in a productive subarctic ecosystem, the
eastern Bering Sea, during 1995–2011, Deep-Sea Res. Pt. II, 109, 71–83,
https://doi.org/10.1016/j.dsr2.2013.12.007, 2014.
Springer, A. M. and McRoy, C. P.: The paradox of pelagic food webs in the
northern Bering Sea—III. Patterns of primary production, Cont. Shelf Res.,
13, 575–599, https://doi.org/10.1016/0278-4343(93)90095-F, 1993.
Springer, A. M., McRoy, C. P., and Flint, M. V.: The Bering Sea Green Belt:
shelf edge processes and ecosystem production, Fish. Oceanogr., 5, 205–223,
https://doi.org/10.1111/j.1365-2419.1996.tb00118.x, 1996.
Søreide, J. E., Leu, E., Berge, J., Graeve, M., and Falk-Petersen, S.:
Timing of blooms, algal food quality and Calanus glacialis reproduction and
growth in a changing Arctic, Glob. Change Biol., 16, 3154–3163,
https://doi.org/10.1111/j.1365-2486.2010.02175.x, 2010.
Takao, S., Hirawake, T., Wright, S. W., and Suzuki, K.: Variations of net
primary productivity and phytoplankton community composition in the Indian
sector of the Southern Ocean as estimated from ocean color remote sensing
data, Biogeosciences, 9, 3875–3890, https://doi.org/10.5194/bg-9-3875-2012, 2012.
Trembley, J.-É. and Gagnon, J.: The effect of irradiance and nutrient
supply on the productivity of Arctic waters: a perspective on climate change,
in: Influence of Climate Change on the Changing Arctic and Sub-Arctic
Conditions, edited by: Nihoul, J. C. J. and Kostianoy, A. G., Springer,
Netherlands, 73–93, 2009.
Uitz, J., Claustre, H., Morel, A., and Hooker, S. B.: Vertical distribution
of phytoplankton communities in open ocean: An assessment based on surface
chlorophyll, J. Geophys. Res., 111, C08005, https://doi.org/10.1029/2005JC003207, 2006.
Welschmeyer, N.: Fluorometric analysis of chlorophyll a in the presence of
chlorophyll b and pheopigments, Limnol. Oceanogr., 39, 1985–1992,
https://doi.org/10.4319/lo.1994.39.8.1985, 1994.
Short summary
This study provides the general relationship between the timing of sea ice retreat and phytoplankton size structure during the marginal ice zone bloom period in the Chukchi and Bering shelves using a satellite remote sensing approach. We also found that not only the length of the ice-free season but also the annual phytoplankton size composition positively correlated with annual net primary production.
This study provides the general relationship between the timing of sea ice retreat and...
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