Articles | Volume 17, issue 7
https://doi.org/10.5194/bg-17-1991-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-17-1991-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
15 Apr 2020
Research article |
| 15 Apr 2020
| 15 Apr 2020
Acrylic acid and related dimethylated sulfur compounds in the Bohai and Yellow seas during summer and winter
Xi Wu
Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
Laboratory for Marine Ecology and Environmental Science, Qingdao
National Laboratory for Marine Science and Technology, Qingdao, 266071,
China
College of Chemistry and Chemical Engineering, Ocean University of
China, Qingdao, 266100, China
Pei-Feng Li
College of Chemistry and Chemical Engineering, Ocean University of
China, Qingdao, 266100, China
Hong-Hai Zhang
Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
Laboratory for Marine Ecology and Environmental Science, Qingdao
National Laboratory for Marine Science and Technology, Qingdao, 266071,
China
College of Chemistry and Chemical Engineering, Ocean University of
China, Qingdao, 266100, China
Mao-Xu Zhu
CORRESPONDING AUTHOR
Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
Laboratory for Marine Ecology and Environmental Science, Qingdao
National Laboratory for Marine Science and Technology, Qingdao, 266071,
China
College of Chemistry and Chemical Engineering, Ocean University of
China, Qingdao, 266100, China
Chun-Ying Liu
CORRESPONDING AUTHOR
Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
Laboratory for Marine Ecology and Environmental Science, Qingdao
National Laboratory for Marine Science and Technology, Qingdao, 266071,
China
College of Chemistry and Chemical Engineering, Ocean University of
China, Qingdao, 266100, China
Gui-Peng Yang
Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
Laboratory for Marine Ecology and Environmental Science, Qingdao
National Laboratory for Marine Science and Technology, Qingdao, 266071,
China
College of Chemistry and Chemical Engineering, Ocean University of
China, Qingdao, 266100, China
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Jian Wang, Lei Xue, Qianyao Ma, Feng Xu, Gaobin Xu, Shibo Yan, Jiawei Zhang, Jianlong Li, Honghai Zhang, Guiling Zhang, and Zhaohui Chen
EGUsphere, https://doi.org/10.5194/egusphere-2023-2935, https://doi.org/10.5194/egusphere-2023-2935, 2024
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This study investigated the distribution and sources of non-methane hydrocarbons (NMHCs) in the lower atmosphere over the marginal seas of China. NMHCs, a subset of volatile organic compounds (VOCs), play a crucial role in atmospheric chemistry. Derived from systematic atmospheric sampling in coastal cities and marginal sea regions, this study offer valuable insights into the interaction between land and sea in shaping offshore atmospheric NMHCs.
Juan Yu, Lei Yu, Zhen He, Gui-Peng Yang, Jing-Guang Lai, and Qian Liu
Biogeosciences, 21, 161–176, https://doi.org/10.5194/bg-21-161-2024, https://doi.org/10.5194/bg-21-161-2024, 2024
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The distributions of volatile organic sulfur compounds (VSCs) (DMS, COS, and CS2) in the seawater and atmosphere of the Bohai and Yellow Seas were evaluated. Seasonal variations in VSCs were found and showed summer > spring. The COS concentrations exhibited positive correlation with DOC concentrations in seawater during summer. VSCs concentrations in seawater decreased with the depth. Sea-to-air fluxes of COS, DMS, and CS2 indicated that these marginal seas are sources of atmospheric VSCs.
Shengqian Zhou, Ying Chen, Shan Huang, Xianda Gong, Guipeng Yang, Honghai Zhang, Hartmut Herrmann, Alfred Wiedensohler, Laurent Poulain, Yan Zhang, Fanghui Wang, Zongjun Xu, and Ke Yan
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2023-249, https://doi.org/10.5194/essd-2023-249, 2023
Revised manuscript under review for ESSD
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Dimethyl sulfide (DMS) is a crucial natural reactive gas in the global climate system, due to its great contribution to aerosols and subsequent impact on clouds over remote oceans. Leveraging machine learning techniques, we constructed a long-term global sea surface DMS gridded dataset with daily resolution. Compared to previous datasets, our new dataset holds promise for improving atmospheric chemistry modeling and advancing our comprehension of the climate effects associated with oceanic DMS.
Lin Yang, Jing Zhang, Anja Engel, and Gui-Peng Yang
Biogeosciences, 19, 5251–5268, https://doi.org/10.5194/bg-19-5251-2022, https://doi.org/10.5194/bg-19-5251-2022, 2022
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Enrichment factors of dissolved organic matter (DOM) in the eastern marginal seas of China exhibited a significant spatio-temporal variation. Photochemical and enrichment processes co-regulated DOM enrichment in the sea-surface microlayer (SML). Autochthonous DOM was more frequently enriched in the SML than terrestrial DOM. DOM in the sub-surface water exhibited higher aromaticity than that in the SML.
Junri Zhao, Weichun Ma, Kelsey R. Bilsback, Jeffrey R. Pierce, Shengqian Zhou, Ying Chen, Guipeng Yang, and Yan Zhang
Atmos. Chem. Phys., 22, 9583–9600, https://doi.org/10.5194/acp-22-9583-2022, https://doi.org/10.5194/acp-22-9583-2022, 2022
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Marine dimethylsulfide (DMS) emissions play important roles in atmospheric sulfur cycle and climate effects. In this study, DMS emissions were estimated by using the machine learning method and drove the global 3D chemical transport model to simulate their climate effects. To our knowledge, this is the first study in the Asian region that quantifies the combined impacts of DMS on sulfate, particle number concentration, and radiative forcings.
Ye Tian, Gui-Peng Yang, Chun-Ying Liu, Pei-Feng Li, Hong-Tao Chen, and Hermann W. Bange
Ocean Sci., 16, 135–148, https://doi.org/10.5194/os-16-135-2020, https://doi.org/10.5194/os-16-135-2020, 2020
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Nitric oxide (NO) could be produced by nitrite photolysis; the rates from dissolved nitrite in artificial seawater showed increasing trends with decreasing pH, increasing temperatures, and increasing salinity. However, NO photoproduction from the natural seawater samples did not show correlations with pH, water temperature, salinity, or dissolved nitrite concentrations in the western tropical North Pacific Ocean (WNTP). And there were other NO loss processes in the surface layer of WNTP.
Ye Tian, Chao Xue, Chun-Ying Liu, Gui-Peng Yang, Pei-Feng Li, Wei-Hua Feng, and Hermann W. Bange
Biogeosciences, 16, 4485–4496, https://doi.org/10.5194/bg-16-4485-2019, https://doi.org/10.5194/bg-16-4485-2019, 2019
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Nitric oxide (NO) seems to be widespread, with different functions in the marine ecosystem, but we know little about it. Concentrations of NO were in a range from below the limit of detection to 616 pmol L−1 at the surface and 482 pmol L−1 at the bottom of the Bohai and Yellow seas. The study region was a source of atmospheric NO. Net NO sea-to-air fluxes were much lower than NO photoproduction rates, implying that the NO produced in the mixed layer was rapidly consumed before entering the air.
Robin Bénard, Maurice Levasseur, Michael Scarratt, Sonia Michaud, Michel Starr, Alfonso Mucci, Gustavo Ferreyra, Michel Gosselin, Jean-Éric Tremblay, Martine Lizotte, and Gui-Peng Yang
Biogeosciences, 16, 1167–1185, https://doi.org/10.5194/bg-16-1167-2019, https://doi.org/10.5194/bg-16-1167-2019, 2019
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We present rare data on the combined effects of acidification and warming on dimethylsulfide (DMS) during a mesocosm experiment. Our results show a reduction of DMS under elevated pCO2, but warming the mesocosms by 5 °C translated into a positive offset in concentrations of DMS over the whole range of pCO2 tested. Our results suggest that warming could mitigate the expected reduction in DMS production due to OA, even increasing the net DMS production, with possible repercussions for the climate.
Sheng-Hui Zhang, Juan Yu, Qiong-Yao Ding, Gui-Peng Yang, Kun-Shan Gao, Hong-Hai Zhang, and Da-Wei Pan
Biogeosciences, 15, 6649–6658, https://doi.org/10.5194/bg-15-6649-2018, https://doi.org/10.5194/bg-15-6649-2018, 2018
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Environmental effects of ocean acidification and trace gases have drawn much attention in recent years and existing studies reveal that the response of communities and trace gases to ocean acidification is still not predictable and requires further study. The present study examined the effect of elevated pCO2 on trace gas production and phytoplankton during an ocean acidification mesocosm experiment.
Juan Yu, Jiyuan Tian, Zhengyu Zhang, Guipeng Yang, and Hongju Chen
Biogeosciences Discuss., https://doi.org/10.5194/bg-2017-568, https://doi.org/10.5194/bg-2017-568, 2018
Preprint retracted
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Data from the field experiment showed that Calanus sinicus was the predominant copepod in Jiaozhou Bay and has no apparent effect on DMS/DMSP production. The results in the laboratory experiment showed that the effects of C. sinicus grazing on DMS/DMSP production differed depending on the food type, food concentration and salinity. The data presented in this study are helpful to evaluate the copepod role on the biogeochemical cycle of DMSP in Jiaozhou Bay.
Shan Jian, Jing Zhang, Hong-Hai Zhang, and Gui-Peng Yang
Biogeosciences Discuss., https://doi.org/10.5194/bg-2017-453, https://doi.org/10.5194/bg-2017-453, 2017
Manuscript not accepted for further review
Chun-Ying Liu, Wei-Hua Feng, Ye Tian, Gui-Peng Yang, Pei-Feng Li, and Hermann W. Bange
Ocean Sci., 13, 623–632, https://doi.org/10.5194/os-13-623-2017, https://doi.org/10.5194/os-13-623-2017, 2017
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We developed a new method for the determination of dissolved nitric oxide (NO) in discrete seawater samples based on the combination of a purge-and-trap setup and a fluorometric detection of NO. With this method we have a reliable and comparably easy to use method to measure oceanic NO surface concentrations, which can be used to decipher both its temporal and spatial distributions as well as its biogeochemical pathways in the oceans.
Josiane Mélançon, Maurice Levasseur, Martine Lizotte, Michael Scarratt, Jean-Éric Tremblay, Philippe Tortell, Gui-Peng Yang, Guang-Yu Shi, Huiwang Gao, David Semeniuk, Marie Robert, Michael Arychuk, Keith Johnson, Nes Sutherland, Marty Davelaar, Nina Nemcek, Angelica Peña, and Wendy Richardson
Biogeosciences, 13, 1677–1692, https://doi.org/10.5194/bg-13-1677-2016, https://doi.org/10.5194/bg-13-1677-2016, 2016
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Ocean acidification is likely to affect iron-limited phytoplankton fertilization by desert dust. Short incubations of northeast subarctic Pacific waters enriched with dust and set at pH 8.0 and 7.8 were conducted. Acidification led to a significant reduction (by 16–38 %) of the final concentration of chl a reached after enrichment. These results show that dust deposition events in a low-pH iron-limited ocean are likely to stimulate phytoplankton growth to a lesser extent than in today's ocean.
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Weiyi Tang, Jeff Talbott, Timothy Jones, and Bess B. Ward
EGUsphere, https://doi.org/10.5194/egusphere-2024-638, https://doi.org/10.5194/egusphere-2024-638, 2024
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Lennart Thomas Bach, Aaron James Ferderer, Julie LaRoche, and Kai Georg Schulz
EGUsphere, https://doi.org/10.5194/egusphere-2024-692, https://doi.org/10.5194/egusphere-2024-692, 2024
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Claudine Hauri, Brita Irving, Sam Dupont, Rémi Pagés, Donna D. W. Hauser, and Seth L. Danielson
Biogeosciences, 21, 1135–1159, https://doi.org/10.5194/bg-21-1135-2024, https://doi.org/10.5194/bg-21-1135-2024, 2024
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Arctic marine ecosystems are highly susceptible to impacts of climate change and ocean acidification. We present pH and pCO2 time series (2016–2020) from the Chukchi Ecosystem Observatory and analyze the drivers of the current conditions to get a better understanding of how climate change and ocean acidification could affect the ecological niches of organisms.
William Hiles, Lucy C. Miller, Craig Smeaton, and William E. N. Austin
Biogeosciences, 21, 929–948, https://doi.org/10.5194/bg-21-929-2024, https://doi.org/10.5194/bg-21-929-2024, 2024
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Saltmarsh soils may help to limit the rate of climate change by storing carbon. To understand their impacts, they must be accurately mapped. We use drone data to estimate the size of three saltmarshes in NE Scotland. We find that drone imagery, combined with tidal data, can reliably inform our understanding of saltmarsh size. When compared with previous work using vegetation communities, we find that our most reliable new estimates of stored carbon are 15–20 % smaller than previously estimated.
De'Marcus Robinson, Anh L. D. Pham, David J. Yousavich, Felix Janssen, Frank Wenzhöfer, Eleanor C. Arrington, Kelsey M. Gosselin, Marco Sandoval-Belmar, Matthew Mar, David L. Valentine, Daniele Bianchi, and Tina Treude
Biogeosciences, 21, 773–788, https://doi.org/10.5194/bg-21-773-2024, https://doi.org/10.5194/bg-21-773-2024, 2024
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The present study suggests that high release of ferrous iron from the seafloor of the oxygen-deficient Santa Barabara Basin (California) supports surface primary productivity, creating positive feedback on seafloor iron release by enhancing low-oxygen conditions in the basin.
David J. Yousavich, De'Marcus Robinson, Xuefeng Peng, Sebastian J. E. Krause, Frank Wenzhöfer, Felix Janssen, Na Liu, Jonathan Tarn, Franklin Kinnaman, David L. Valentine, and Tina Treude
Biogeosciences, 21, 789–809, https://doi.org/10.5194/bg-21-789-2024, https://doi.org/10.5194/bg-21-789-2024, 2024
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Declining oxygen (O2) concentrations in coastal oceans can threaten people’s ways of life and food supplies. Here, we investigate how mats of bacteria that proliferate on the seafloor of the Santa Barbara Basin sustain and potentially worsen these O2 depletion events through their unique chemoautotrophic metabolism. Our study shows how changes in seafloor microbiology and geochemistry brought on by declining O2 concentrations can help these mats grow as well as how that growth affects the basin.
Esdoorn Willcox, Marcos Lemes, Thomas Juul-Pedersen, Mikael Kristian Sejr, Johnna Michelle Holding, and Søren Rysgaard
EGUsphere, https://doi.org/10.5194/egusphere-2024-6, https://doi.org/10.5194/egusphere-2024-6, 2024
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For this work we measured the chemistry of seawater from bottles obtained from different depths, lon- and latitudes off the east coast of the Northeast Greenland national park to determine what is influencing concentrations of dissolved CO2. Historically, the region has always been thought to take up CO2 from the atmosphere but we show that it is possible for the region to become a source in late summer and discuss what variables may be related to such changes.
Mallory Ringham, Nathan Hirtle, Cody Shaw, Xi Lu, Julian Herndon, Brendan Carter, and Matthew Eisaman
EGUsphere, https://doi.org/10.5194/egusphere-2024-108, https://doi.org/10.5194/egusphere-2024-108, 2024
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Ocean alkalinity enhancement leverages the large surface area and carbon storage capacity of the oceans to store atmospheric CO2 as dissolved bicarbonate. We monitored CO2 uptake in seawater treated with NaOH to establish operational boundaries for carbon removal experiments. Preliminary results show CO2 equilibration occurred on order of weeks to months, was consistent with values expected from equilibration calculations, and was limited by mineral precipitation at high pH and CaCO3 saturation.
Krysten Rutherford, Katja Fennel, Lina Garcia Suarez, and Jasmin G. John
Biogeosciences, 21, 301–314, https://doi.org/10.5194/bg-21-301-2024, https://doi.org/10.5194/bg-21-301-2024, 2024
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We downscaled two mid-century (~2075) ocean model projections to a high-resolution regional ocean model of the northwest North Atlantic (NA) shelf. In one projection, the NA shelf break current practically disappears; in the other it remains almost unchanged. This leads to a wide range of possible future shelf properties. More accurate projections of coastal circulation features would narrow the range of possible outcomes of biogeochemical projections for shelf regions.
Lennart Thomas Bach
Biogeosciences, 21, 261–277, https://doi.org/10.5194/bg-21-261-2024, https://doi.org/10.5194/bg-21-261-2024, 2024
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Ocean alkalinity enhancement (OAE) is a widely considered marine carbon dioxide removal method. OAE aims to accelerate chemical rock weathering, which is a natural process that slowly sequesters atmospheric carbon dioxide. This study shows that the addition of anthropogenic alkalinity via OAE can reduce the natural release of alkalinity and, therefore, reduce the efficiency of OAE for climate mitigation. However, the additionality problem could be mitigated via a variety of activities.
Tsuneo Ono, Daisuke Muraoka, Masahiro Hayashi, Makiko Yorifuji, Akihiro Dazai, Shigeyuki Omoto, Takehiro Tanaka, Tomohiro Okamura, Goh Onitsuka, Kenji Sudo, Masahiko Fujii, Ryuji Hamanoue, and Masahide Wakita
Biogeosciences, 21, 177–199, https://doi.org/10.5194/bg-21-177-2024, https://doi.org/10.5194/bg-21-177-2024, 2024
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We carried out parallel year-round observations of pH and related parameters in five stations around the Japan coast. It was found that short-term acidified situations with Omega_ar less than 1.5 occurred at four of five stations. Most of such short-term acidified events were related to the short-term low salinity event, and the extent of short-term pH drawdown at high freshwater input was positively correlated with the nutrient concentration of the main rivers that flow into the coastal area.
Riel Carlo O. Ingeniero, Gesa Schulz, and Hermann W. Bange
EGUsphere, https://doi.org/10.5194/egusphere-2023-3009, https://doi.org/10.5194/egusphere-2023-3009, 2023
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Our research is the first to measure dissolved NO concentrations in temperate estuarine waters, providing insights into its distribution under varying conditions and enhancing our understanding of its production processes. We found that the lower Elbe Estuary and the Hamburg Port area were a source of atmospheric NO. Our results suggest that NO in the lower Elbe Estuary was produced during nitrification, whereas NO in the Hamburg Port area was produced during nitrifier-denitrification.
K. Mareike Paul, Martijn Hermans, Sami A. Jokinen, Inda Brinkmann, Helena L. Filipsson, and Tom Jilbert
Biogeosciences, 20, 5003–5028, https://doi.org/10.5194/bg-20-5003-2023, https://doi.org/10.5194/bg-20-5003-2023, 2023
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Seawater naturally contains trace metals such as Mo and U, which accumulate under low oxygen conditions on the seafloor. Previous studies have used sediment Mo and U contents as an archive of changing oxygen concentrations in coastal waters. Here we show that in fjords the use of Mo and U for this purpose may be impaired by additional processes. Our findings have implications for the reliable use of Mo and U to reconstruct oxygen changes in fjords.
Hannah Sharpe, Michel Gosselin, Catherine Lalande, Alexandre Normandeau, Jean-Carlos Montero-Serrano, Khouloud Baccara, Daniel Bourgault, Owen Sherwood, and Audrey Limoges
Biogeosciences, 20, 4981–5001, https://doi.org/10.5194/bg-20-4981-2023, https://doi.org/10.5194/bg-20-4981-2023, 2023
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We studied the impact of submarine canyon processes within the Pointe-des-Monts system on biogenic matter export and phytoplankton assemblages. Using data from three oceanographic moorings, we show that the canyon experienced two low-amplitude sediment remobilization events in 2020–2021 that led to enhanced particle fluxes in the deep-water column layer > 2.6 km offshore. Sinking phytoplankton fluxes were lower near the canyon compared to background values from the lower St. Lawrence Estuary.
Dewi Langlet, Florian Mermillod-Blondin, Noémie Deldicq, Arthur Bauville, Gwendoline Duong, Lara Konecny, Mylène Hugoni, Lionel Denis, and Vincent M. P. Bouchet
Biogeosciences, 20, 4875–4891, https://doi.org/10.5194/bg-20-4875-2023, https://doi.org/10.5194/bg-20-4875-2023, 2023
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Benthic foraminifera are single-cell marine organisms which can move in the sediment column. They were previously reported to horizontally and vertically transport sediment particles, yet the impact of their motion on the dissolved fluxes remains unknown. Using microprofiling, we show here that foraminiferal burrow formation increases the oxygen penetration depth in the sediment, leading to a change in the structure of the prokaryotic community.
Masahiko Fujii, Ryuji Hamanoue, Lawrence Patrick Cases Bernardo, Tsuneo Ono, Akihiro Dazai, Shigeyuki Oomoto, Masahide Wakita, and Takehiro Tanaka
Biogeosciences, 20, 4527–4549, https://doi.org/10.5194/bg-20-4527-2023, https://doi.org/10.5194/bg-20-4527-2023, 2023
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This is the first study of the current and future impacts of climate change on Pacific oyster farming in Japan. Future coastal warming and acidification may affect oyster larvae as a result of longer exposure to lower-pH waters. A prolonged spawning period may harm oyster processing by shortening the shipping period and reducing oyster quality. To minimize impacts on Pacific oyster farming, in addition to mitigation measures, local adaptation measures may be required.
Marlena Szeligowska, Déborah Benkort, Anna Przyborska, Mateusz Moskalik, Bernabé Moreno, Emilia Trudnowska, and Katarzyna Błachowiak-Samołyk
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-162, https://doi.org/10.5194/bg-2023-162, 2023
Revised manuscript accepted for BG
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European Arctic experiences rapid regional warming resulting in the retreat of glaciers terminating in the sea onto land. Due to this process, area of one of the well-studied fjords, Hornsund, increased by 100 km2 and 38 %. Using improved mathematical model, we estimated that despite some negative consequences of glacial meltwater release such newly ice-free area markedly contribute to atmospheric carbon uptake and become efficient carbon sinks.
Taketoshi Kodama, Atsushi Nishimoto, Ken-ichi Nakamura, Misato Nakae, Naoki Iguchi, Yosuke Igeta, and Yoichi Kogure
Biogeosciences, 20, 3667–3682, https://doi.org/10.5194/bg-20-3667-2023, https://doi.org/10.5194/bg-20-3667-2023, 2023
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Carbon and nitrogen are essential elements for organisms; their stable isotope ratios (13C : 12C, 15N : 14N) are useful tools for understanding turnover and movement in the ocean. In the Sea of Japan, the environment is rapidly being altered by human activities. The 13C : 12C of small organic particles is increased by active carbon fixation, and phytoplankton growth increases the values. The 15N : 14N variations suggest that nitrates from many sources contribute to organic production.
Aubin Thibault de Chanvalon, George W. Luther, Emily R. Estes, Jennifer Necker, Bradley M. Tebo, Jianzhong Su, and Wei-Jun Cai
Biogeosciences, 20, 3053–3071, https://doi.org/10.5194/bg-20-3053-2023, https://doi.org/10.5194/bg-20-3053-2023, 2023
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The intensity of the oceanic trap of CO2 released by anthropogenic activities depends on the alkalinity brought by continental weathering. Between ocean and continent, coastal water and estuaries can limit or favour the alkalinity transfer. This study investigate new interactions between dissolved metals and alkalinity in the oxygen-depleted zone of estuaries.
Joonas J. Virtasalo, Peter Österholm, and Eero Asmala
Biogeosciences, 20, 2883–2901, https://doi.org/10.5194/bg-20-2883-2023, https://doi.org/10.5194/bg-20-2883-2023, 2023
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We mixed acidic metal-rich river water from acid sulfate soils and seawater in the laboratory to study the flocculation of dissolved metals and organic matter in estuaries. Al and Fe flocculated already at a salinity of 0–2 to large organic flocs (>80 µm size). Precipitation of Al and Fe hydroxide flocculi (median size 11 µm) began when pH exceeded ca. 5.5. Mn transferred weakly to Mn hydroxides and Co to the flocs. Up to 50 % of Cu was associated with the flocs, irrespective of seawater mixing.
Moritz Baumann, Allanah Joy Paul, Jan Taucher, Lennart Thomas Bach, Silvan Goldenberg, Paul Stange, Fabrizio Minutolo, and Ulf Riebesell
Biogeosciences, 20, 2595–2612, https://doi.org/10.5194/bg-20-2595-2023, https://doi.org/10.5194/bg-20-2595-2023, 2023
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The sinking velocity of marine particles affects how much atmospheric CO2 is stored inside our oceans. We measured particle sinking velocities in the Peruvian upwelling system and assessed their physical and biochemical drivers. We found that sinking velocity was mainly influenced by particle size and porosity, while ballasting minerals played only a minor role. Our findings help us to better understand the particle sinking dynamics in this highly productive marine system.
Kyle E. Hinson, Marjorie A. M. Friedrichs, Raymond G. Najjar, Maria Herrmann, Zihao Bian, Gopal Bhatt, Pierre St-Laurent, Hanqin Tian, and Gary Shenk
Biogeosciences, 20, 1937–1961, https://doi.org/10.5194/bg-20-1937-2023, https://doi.org/10.5194/bg-20-1937-2023, 2023
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Climate impacts are essential for environmental managers to consider when implementing nutrient reduction plans designed to reduce hypoxia. This work highlights relative sources of uncertainty in modeling regional climate impacts on the Chesapeake Bay watershed and consequent declines in bay oxygen levels. The results demonstrate that planned water quality improvement goals are capable of reducing hypoxia levels by half, offsetting climate-driven impacts on terrestrial runoff.
Linquan Mu, Jaime B. Palter, and Hongjie Wang
Biogeosciences, 20, 1963–1977, https://doi.org/10.5194/bg-20-1963-2023, https://doi.org/10.5194/bg-20-1963-2023, 2023
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Enhancing ocean alkalinity accelerates carbon dioxide removal from the atmosphere. We hypothetically added alkalinity to the Amazon River and examined the increment of the carbon uptake by the Amazon plume. We also investigated the minimum alkalinity addition in which this perturbation at the river mouth could be detected above the natural variability.
Karl M. Attard, Anna Lyssenko, and Iván F. Rodil
Biogeosciences, 20, 1713–1724, https://doi.org/10.5194/bg-20-1713-2023, https://doi.org/10.5194/bg-20-1713-2023, 2023
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Aquatic plants produce a large amount of organic matter through photosynthesis that, following erosion, is deposited on the seafloor. In this study, we show that plant detritus can trigger low-oxygen conditions (hypoxia) in shallow coastal waters, making conditions challenging for most marine animals. We propose that the occurrence of hypoxia may be underestimated because measurements typically do not consider the region closest to the seafloor, where detritus accumulates.
M. James McLaughlin, Cindy Bessey, Gary A. Kendrick, John Keesing, and Ylva S. Olsen
Biogeosciences, 20, 1011–1026, https://doi.org/10.5194/bg-20-1011-2023, https://doi.org/10.5194/bg-20-1011-2023, 2023
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Coral reefs face increasing pressures from environmental change at present. The coral reef framework is produced by corals and calcifying algae. The Kimberley region of Western Australia has escaped land-based anthropogenic impacts. Specimens of the dominant coral and algae were collected from Browse Island's reef platform and incubated in mesocosms to measure calcification and production patterns of oxygen. This study provides important data on reef building and climate-driven effects.
Patricia Ayón Dejo, Elda Luz Pinedo Arteaga, Anna Schukat, Jan Taucher, Rainer Kiko, Helena Hauss, Sabrina Dorschner, Wilhelm Hagen, Mariona Segura-Noguera, and Silke Lischka
Biogeosciences, 20, 945–969, https://doi.org/10.5194/bg-20-945-2023, https://doi.org/10.5194/bg-20-945-2023, 2023
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Ocean upwelling regions are highly productive. With ocean warming, severe changes in upwelling frequency and/or intensity and expansion of accompanying oxygen minimum zones are projected. In a field experiment off Peru, we investigated how different upwelling intensities affect the pelagic food web and found failed reproduction of dominant zooplankton. The changes projected could severely impact the reproductive success of zooplankton communities and the pelagic food web in upwelling regions.
Mathilde Jutras, Alfonso Mucci, Gwenaëlle Chaillou, William A. Nesbitt, and Douglas W. R. Wallace
Biogeosciences, 20, 839–849, https://doi.org/10.5194/bg-20-839-2023, https://doi.org/10.5194/bg-20-839-2023, 2023
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The deep waters of the lower St Lawrence Estuary and gulf have, in the last decades, experienced a strong decline in their oxygen concentration. Below 65 µmol L-1, the waters are said to be hypoxic, with dire consequences for marine life. We show that the extent of the hypoxic zone shows a seven-fold increase in the last 20 years, reaching 9400 km2 in 2021. After a stable period at ~ 65 µmol L⁻¹ from 1984 to 2019, the oxygen level also suddenly decreased to ~ 35 µmol L-1 in 2020.
Sachi Umezawa, Manami Tozawa, Yuichi Nosaka, Daiki Nomura, Hiroji Onishi, Hiroto Abe, Tetsuya Takatsu, and Atsushi Ooki
Biogeosciences, 20, 421–438, https://doi.org/10.5194/bg-20-421-2023, https://doi.org/10.5194/bg-20-421-2023, 2023
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We conducted repetitive observations in Funka Bay, Japan, during the spring bloom 2019. We found nutrient concentration decreases in the dark subsurface layer during the bloom. Incubation experiments confirmed that diatoms could consume nutrients at a substantial rate, even in darkness. We concluded that the nutrient reduction was mainly caused by nutrient consumption by diatoms in the dark.
Dirk Jong, Lisa Bröder, Tommaso Tesi, Kirsi H. Keskitalo, Nikita Zimov, Anna Davydova, Philip Pika, Negar Haghipour, Timothy I. Eglinton, and Jorien E. Vonk
Biogeosciences, 20, 271–294, https://doi.org/10.5194/bg-20-271-2023, https://doi.org/10.5194/bg-20-271-2023, 2023
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With this study, we want to highlight the importance of studying both land and ocean together, and water and sediment together, as these systems function as a continuum, and determine how organic carbon derived from permafrost is broken down and its effect on global warming. Although on the one hand it appears that organic carbon is removed from sediments along the pathway of transport from river to ocean, it also appears to remain relatively ‘fresh’, despite this removal and its very old age.
Georgia Filippi, Manos Dassenakis, Vasiliki Paraskevopoulou, and Konstantinos Lazogiannis
Biogeosciences, 20, 163–189, https://doi.org/10.5194/bg-20-163-2023, https://doi.org/10.5194/bg-20-163-2023, 2023
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The pollution of the western Saronikos Gulf from heavy metals has been examined through the study of marine sediment cores. It is a deep gulf (maximum depth 440 m) near Athens affected by industrial and volcanic activity. Eight cores were received from various stations and depths and analysed for their heavy metal content and geochemical characteristics. The results were evaluated by using statistical methods, environmental indicators and comparisons with old data.
Jing He and Michael D. Tyka
Biogeosciences, 20, 27–43, https://doi.org/10.5194/bg-20-27-2023, https://doi.org/10.5194/bg-20-27-2023, 2023
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Recently, ocean alkalinity enhancement (OAE) has gained interest as a scalable way to address the urgent need for negative CO2 emissions. In this paper we examine the capacity of different coastlines to tolerate alkalinity enhancement and the time scale of CO2 uptake following the addition of a given quantity of alkalinity. The results suggest that OAE has significant potential and identify specific favorable and unfavorable coastlines for its deployment.
Arnaud Laurent, Haiyan Zhang, and Katja Fennel
Biogeosciences, 19, 5893–5910, https://doi.org/10.5194/bg-19-5893-2022, https://doi.org/10.5194/bg-19-5893-2022, 2022
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The Changjiang is the main terrestrial source of nutrients to the East China Sea (ECS). Nutrient delivery to the ECS has been increasing since the 1960s, resulting in low oxygen (hypoxia) during phytoplankton decomposition in summer. River phosphorus (P) has increased less than nitrogen, and therefore, despite the large nutrient delivery, phytoplankton growth can be limited by the lack of P. Here, we investigate this link between P limitation, phytoplankton production/decomposition, and hypoxia.
Coline Poppeschi, Guillaume Charria, Anne Daniel, Romaric Verney, Peggy Rimmelin-Maury, Michaël Retho, Eric Goberville, Emilie Grossteffan, and Martin Plus
Biogeosciences, 19, 5667–5687, https://doi.org/10.5194/bg-19-5667-2022, https://doi.org/10.5194/bg-19-5667-2022, 2022
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This paper aims to understand interannual changes in the initiation of the phytoplankton growing period (IPGP) in the current context of global climate changes over the last 20 years. An important variability in the timing of the IPGP is observed with a trend towards a later IPGP during this last decade. The role and the impact of extreme events (cold spells, floods, and wind burst) on the IPGP is also detailed.
Lin Yang, Jing Zhang, Anja Engel, and Gui-Peng Yang
Biogeosciences, 19, 5251–5268, https://doi.org/10.5194/bg-19-5251-2022, https://doi.org/10.5194/bg-19-5251-2022, 2022
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Enrichment factors of dissolved organic matter (DOM) in the eastern marginal seas of China exhibited a significant spatio-temporal variation. Photochemical and enrichment processes co-regulated DOM enrichment in the sea-surface microlayer (SML). Autochthonous DOM was more frequently enriched in the SML than terrestrial DOM. DOM in the sub-surface water exhibited higher aromaticity than that in the SML.
Mona Norbisrath, Johannes Pätsch, Kirstin Dähnke, Tina Sanders, Gesa Schulz, Justus E. E. van Beusekom, and Helmuth Thomas
Biogeosciences, 19, 5151–5165, https://doi.org/10.5194/bg-19-5151-2022, https://doi.org/10.5194/bg-19-5151-2022, 2022
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Total alkalinity (TA) regulates the oceanic storage capacity of atmospheric CO2. TA is also metabolically generated in estuaries and influences coastal carbon storage through its inflows. We used water samples and identified the Hamburg port area as the one with highest TA generation. Of the overall riverine TA load, 14 % is generated within the estuary. Using a biogeochemical model, we estimated potential effects on the coastal carbon storage under possible anthropogenic and climate changes.
Le Zhang and Z. George Xue
Biogeosciences, 19, 4589–4618, https://doi.org/10.5194/bg-19-4589-2022, https://doi.org/10.5194/bg-19-4589-2022, 2022
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We adopt a high-resolution carbon model for the Gulf of Mexico (GoM) and calculate the decadal trends of important carbon system variables in the GoM from 2001 to 2019. The GoM surface CO2 values experienced a steady increase over the past 2 decades, and the ocean surface pH is declining. Although carbonate saturation rates remain supersaturated with aragonite, they show a slightly decreasing trend. The northern GoM is a stronger carbon sink than we thought.
Cited articles
Alcolombri, U., Ben-Dor, S., Feldmesser, E., Levin, Y., Tawfik, D. S., and
Vardi, A.: Identification of the algal dimethyl sulfide–releasing enzyme: A
missing link in the marine sulfur cycle, Science, 348, 1466–1469, 2015.
Andreae, M. O.: Dimethylsulfide in the water column and the sediment
porewaters of the Peru upwelling area, Limnol. Oceanogr., 30,
1208–1218, 1985.
Andreae, M. O. and Barnard, W. R.: Determination of trace quantities of
dimethyl sulfide in aqueous solutions, Anal. Chem., 55, 608–612,
1983.
Asher, E. C., Dacey, J. W. H., Stukel, M., Long, M. C., and Tortell, P. D.:
Processes driving seasonal variability in DMS, DMSP, and DMSO concentrations
and turnover in coastal Antarctic waters, Limnol. Oceanogr., 62,
104–124, 2017.
Bajt, O., Šket, B., and Faganeli, J.: The aqueous photochemical
transformation of acrylic acid, Mar. Chem., 58, 255–259, 1997.
Bentley, R. and Chasteen, T. G.: Environmental VOSCs – formation and
degradation of dimethyl sulfide, methanethiol and related materials,
Chemosphere, 55, 291–317, 2004.
Charlson, R. J., Lovelock, J. E., Andreae, M. O., and Warren, S. G.: Oceanic
phytoplankton, atmospheric sulphur, cloud albedo and climate, Nature, 326,
655–661, 1987.
Curson, A. R. J., Liu, J., Bermejo Martínez, A., Green, R. T., Chan,
Y., Carrión, O., Williams, B. T., Zhang, S.-H., Yang, G.-P., Bulman
Page, P. C., Zhang, X.-H., and Todd, J. D.: Dimethylsulfoniopropionate
biosynthesis in marine bacteria and identification of the key gene in this
process, Nature Microbiol., 2, 17009, https://doi.org/10.1038/nmicrobiol.2017.9, 2017.
Dacey, J. W. and Blough, N. V.: Hydroxide decomposition of
dimethylsulfoniopropionate to form dimethylsulfide, Geophys. Res.
Lett., 14, 1246–1249, 1987.
Dacey, J. W. and Wakeham, S. G.: Oceanic dimethylsulfide: production during
zooplankton grazing on phytoplankton, Science, 233, 1314–1316,
1986.
Deschaseaux, E. S., Jones, G. B., Deseo, M. A., Shepherd, K. M., Kiene, R.
P., Swan, H. B., Harrison, P. L., and Eyre, B. D.: Effects of environmental
factors on dimethylated sulfur compounds and their potential role in the
antioxidant system of the coral holobiont, Limnol. Oceanogr., 59,
758–768, 2014.
Espinosa, M. D. L. L., Martínez, A., Peralta, O., and Castro, T.:
Spatial variability of dimethylsulfide (DMS) and dimethylsulfoniopropionate
(DMSP) in the southern Gulf of Mexico, Environ. Chem., 13, 352–363,
2015.
Gibson, J. A. E., Swadling, K. M., and Burton, H. R.: Acrylate and
Dimenthylsulfoniopropionate (DMSP) Concentrations during an Antarctic
Phytoplankton Bloom, in: Biological and Environmental Chemistry of DMSP and
Related Sulfonium Compounds, edited by: Kiene, R. P., Visscher, P. T.,
Keller, M. D., and Kirst, G. O., Springer US, Boston, MA, 213–222, 1996.
Jin, N.: Studies on Photochemical Process of Dimethylsulfide and its
Transformation Rates in the Yellow Sea and the Bohai Sea, MS thesis, Ocean
University of China, Qingdao, 2016.
Keller, M. D., Bellows, W. K., and Guillard, R. R. L.: Dimethyl sulfide
production in marine phytoplankton, in: Biogenic Sulfur in the Environment,
edited by: Saltzman, E. S. and Cooper, W. J., American Chemical Society,
Washington, DC, 167–182, 1989.
Kiene, R. P. and Gerard, G.: Evaluation of glycine betaine as an inhibitor
of dissolved dimethylsulfoniopropionate degradation in coastal waters,
Mar. Ecol.-Prog. Ser., 128, 121–131, 1995.
Kiene, R. P. and Linn, L. J.: Distribution and turnover of dissolved DMSP
and its relationship with bacterial production and dimethylsulfide in the
Gulf of Mexico, Limnol. Oceanogr., 45, 849–861, 2000a.
Kiene, R. P. and Linn, L. J.: The fate of dissolved
dimethylsulfoniopropionate (DMSP) in seawater: tracer studies using
35S-DMSP, Geochim. Cosmochim. Ac., 64, 2797–2810, 2000b.
Kiene, R. P. and Service, S. K.: Decomposition of dissolved DMSP and DMS in
estuarine waters: dependence on temperature and substrate concentration,
Mar. Ecol.-Prog. Ser., 76, 1–11, 1991.
Kiene, R. P. and Service, S. K.: The Influence of Glycine Betaine on
Dimethyl Sulfide and Dimethylsulfoniopropionate Concentrations in Seawater,
in: Biogeochemistry of Global Change, edited by: Oremland, R. S., Springer
US, Boston, M.A., 654–671, 1993.
Kiene, R. P. and Slezak, D.: Low dissolved DMSP concentrations in seawater
revealed by small-volume gravity filtration and dialysis sampling, Limnol. Oceanogr., 4, 80–95, 2006.
Kiene, R. P., Williams, L. P. H., and Walker, J. E.: Seawater microorganisms
have a high affinity glycine betaine uptake system which also recognizes
dimethylsulfoniopropionate, Aquat. Microb. Ecol., 15, 39–51, 1998.
Kinsey, J. D., Kieber, D. J., and Neale, P. J.: Effects of iron limitation
and UV radiation on Phaeocystis antarctica growth and
dimethylsulfoniopropionate, dimethylsulfoxide and acrylate concentrations,
Environ. Chem., 13, 195–211, 2016.
Kirst, G. O., Thiel, C., Wolff, H., Nothnagel, J., Wanzek, M., and Ulmke,
R.: Dimethylsulfoniopropionate (DMSP) in icealgae and its possible
biological role, Mar. Chem., 35, 381–388, 1991.
Lana, A., Bell, T., Simó, R., Vallina, S., Ballabrera-Poy, J., Kettle,
A., Dachs, J., Bopp, L., Saltzman, E., and Stefels, J.: An updated
climatology of surface dimethlysulfide concentrations and emission fluxes in
the global ocean, Global Biogeochem. Cy., 25, 3–25, 2011.
Ledyard, K. M. and Dacey, J. W.: Microbial cycling of DMSP and DMS in
coastalandoligotrophicseawater, Limnol. Oceanogr., 41, 33–40, 1996.
Lee, H. J., Jung, K. T., Foreman, M., and Chung, J. Y.: A three-dimensional
mixed finite-difference Galerkin function model for the oceanic circulation
in the Yellow Sea and the East China Sea, Cont. Shelf Res., 20,
863–895, 2000.
Levine, N. M., Varaljay, V. A., Toole, D. A., Dacey, J. W., Doney, S. C.,
and Moran, M. A.: Environmental, biochemical and genetic drivers of DMSP
degradation and DMS production in the Sargasso Sea, Environ.
Microbiol., 14, 1210–1223, 2012.
Li, C. X., Yang, G. P., Wang, B. D., and Xu, Z. J.: Vernal distribution and
turnover of dimethylsulfide (DMS) in the surface water of the Yellow Sea,
J. Geophys. Res.-Oceans, 121, 7495–7516, 2016.
Li, C.-Y., Zhang, D., Chen, X.-L., Wang, P., Shi, W.-L., Li, P.-Y., Zhang,
X.-Y., Qin, Q.-L., Todd, J. D., and Zhang, Y.-Z.: Mechanistic Insights into
Dimethylsulfoniopropionate Lyase DddY, a New Member of the Cupin
Superfamily, J. Mol. Biol., 429, 3850–3862, 2017.
Liang, J., Liu, J., Wang, X., Lin, H., Liu, J., Zhou, S., Sun, H., and
Zhang, X.-H.: Spatiotemporal dynamics of free-living and particle-associated
Vibrio communities in the northern Chinese marginal seas, Appl.
Environ. Microbiol., 85, e00217–00219, 2019.
Liu, C. Y., Wang, L. L., Yang, G. P., Chen, Y., and Li, P. F.: Determination
of acrylic acid in seawater by high performance liquid chromatography and
its application, Acta Oceanol. Sin., 35, 172–176, 2013.
Liu, Q.: Analysis and Identification of Organic Compounds and Sifting of
Items of Toxic Organic Compounds for the Water of Yalu River, Urban
Environment & Urban Ecology, 14, 41–43, 2001.
Liu, S., Lou, S., Kuang, C., Huang, W., Chen, W., Zhang, J., and Zhong, G.:
Water quality assessment by pollution-index method in the coastal waters of
Hebei Province in western Bohai Sea, China, Mar. Pollut. Bull., 62,
2220–2229, 2011.
Liu, X., Huang, B., Huang, Q., Wang, L., Ni, X., Tang, Q., Sun, S., Wei, H.,
Liu, S., and Li, C.: Seasonal phytoplankton response to physical processes
in the southern Yellow Sea, J. of Sea Res., 95, 45–55, 2015.
Liu, Y., Liu, C.-Y., Yang, G.-P., Zhang, H.-H., and Zhang, S.-H.:
Biogeochemistry of dimethylsulfoniopropionate, dimethylsulfide and acrylic
acid in the Yellow Sea and the Bohai Sea during autumn, Environ.
Chem., 13, 127–139, 2016.
Lovelock, J. E., Maggs, R. J., and Rasmussen, R. A.: Atmospheric dimethyl
sulphide and the natural sulphur cycle, Nature, 237, 452–453, 1972.
Luan, Q., Sun, J., Shen, Z., Song, S., and Wang, M.: Phytoplankton
assemblage of Yangtze River Estuary and the adjacent East China Sea in
summer, 2004, J. Ocean U. China, 5, 123–131, 2006.
Malin, G. and Erst, G. O.: Algal Production of Dimethyl Sulfide and Its
Atmospheric Role1, J. Phycol., 33, 889–896, 1997.
Malin, G., Turner, S. M., and Liss, P. S.: Sulfur: the plankton/climate
connection, J. Phycol., 28, 590–597, 1992.
McParland, E. L. and Levine, N. M.: The role of differential DMSP
production and community composition in predicting variability of global
surface DMSP concentrations, Limnol. Oceanogr., 64, 757–773, 2019.
Motard-Côté, J., Kieber, D. J., Rellinger, A., and Kiene, R. P.:
Influence of the Mississippi River plume and non-bioavailable DMSP on
dissolved DMSP turnover in the northern Gulf of Mexico, Environ.
Chem., 13, 280–292, 2016.
Nedwell, D. B., Shabbeer, M. T., and Harrison, R. M.: Dimethyl sulphide in
North Sea waters and sediments, Estuar. Coast. Shelf S., 39,
209–217, 1994.
Nguyen, B. C., Mihalopoulos, N., Putaud, J. P., Gaudry, A., Gallet, L.,
Keene, W. C., and Galloway, J. N.: Covariations in oceanic dimethyl sulfide,
its oxidation products and rain acidity at Amsterdam Island in the southern
Indian Ocean, J. Atmos. Chem., 15, 39–53, 1992.
Ning, X., Lin, C., Su, J., Liu, C., Hao, Q., Le, F., and Tang, Q.: Long-term
environmental changes and the responses of the ecosystems in the Bohai Sea
during 1960–1996, Deep-Sea Res. Pt. II, 57, 1079–1091, 2010.
Noordkamp, D. J. B., Gieskes, W. W. C., Gottschal, J. C., Forney, L. J., and
Van Rijssel, M.: Acrylate in Phaeocystis colonies does not affect the
surrounding bacteria, J. Sea Res., 43, 287–296, 2000.
Parsons, T. R., Maita, Y., and Lalli, C. M.: A manual of biological and
chemical methods for seawater analysis, Pergamon Press, Oxford, 1984.
Quinn, P. K. and Bates, T. S.: The case against climate regulation via
oceanic phytoplankton sulphur emissions, Nature, 480, 51–56, 2011.
Reisch, C. R., Moran, M. A., and Whitman, W. B.: Bacterial catabolism of
dimethylsulfoniopropionate (DMSP), Front. Microbiol., 2, 1–12, 2011.
Seeberg-Elverfeldt, J., Schlüter, M., Feseker, T., and Kölling, M.:
Rhizon sampling of porewaters near the sediment-water interface of aquatic
systems, Limnol. Oceanogr.-Meth., 3, 361–371, 2005.
Shenoy, D. M. and Patil, J. S.: Temporal variations in
dimethylsulphoniopropionate and dimethyl sulphide in the Zuari estuary, Goa
(India), Mar. Environ. Res., 56, 387–402, 2003.
Shooter, D. and Brimblecombe, P.: Dimethylsulphide oxidation in the ocean,
Deep-Sea Res. Pt. A, 36, 577–585, 1989.
Sicre, M. A., Peulve, S., Saliot, A., De Leeuw, J. W., and Baas, M.:
Molecular characterization of the organic fraction of suspended matter in
the surface waters and bottom nepheloid layer of the Rhone delta using
analytical pyrolysis, Org. Geochem., 21, 11–26, 1994.
Sieburth, J. M.: Acrylic acid, an “antibiotic” principle in Phaeocystis
blooms in Antarctic waters, Science, 132, 676–677, 1960.
Simó, R., Pedrós-Alió, C., Malin, G., and Grimalt, J. O.:
Biological turnover of DMS, DMSP and DMSO in contrasting open-sea waters,
Mar. Ecol.-Prog. Ser., 203, 1–11, 2000.
Slezak, D., Puskaric, S., and Herndl, G. J.: Potential role of acrylic acid
in bacterioplankton communities in the sea, Mar. Ecol.-Prog. Ser.,
105, 191–197, 1994.
Spiese, C. E., Le, T., Zimmer, R. L., and Kieber, D. J.: Dimethylsulfide
membrane permeability, cellular concentrations and implications for
physiological functions in marine algae, J. Plankton Res., 38,
41–54, 2016.
Stefels, J.: Physiological aspects of the production and conversion of DMSP
in marine algae and higher plants, J. Sea Res., 43, 183–197,
2000.
Steinke, M., Malin, G., Archer, S. D., Burkill, P. H., and Liss, P. S.: DMS
production in a coccolithophorid bloom: evidence for the importance of
dinoflagellate DMSP lyases, Aquat. Microb. Ecol., 26, 259–270, 2002.
Su, J.: Circulation dynamics of the China Seas north of 18∘ N, in:
The Sea, edited by: Robinson, A. R. and Brink, K. H., Wiley, Hoboken, New
Jersey, 483–505, 1998.
Sun, J.: Distribution of Dimethyl Sulfur Compounds in China Marginal Seas
and the Response of Their Algal Release to Acidificaiton MS thesis, Ocean
University of China, Qingdao, 2017.
Sun, J., Liu, D., and Qian, S.: Preliminary study on seasonal succession and
development pathway of phytoplankton community in the Bohai Sea, Acta
Oceanol. Sin., 20, 251–260, 2001.
Sunda, W. G., Kieber, D. J., Kiene, R. P., and Huntsman, S.: An antioxidant
function for DMSP and DMS in marine algae, Nature, 418, 317–320, 2002.
Tan, T.-T., Wu, X., Liu, C.-Y., and Yang, G.-P.: Distributions of
dimethylsulfide and its related compounds in the Yangtze (Changjiang) River
Estuary and its adjacent waters in early summer, Cont. Shelf Res.,
146, 89–101, 2017.
Taylor, B. F. and Visscher, P. T.: Metabolic Pathways Involved in DMSP
Degradation, in: Biological and Environmental Chemistry of DMSP and Related
Sulfonium Compounds, edited by: Kiene, R. P., Visscher, P. T., Keller, M.
D., and Kirst, G. O., Springer US, Boston, MA, 265–276, 1996.
Tyssebotn, I. M. B., Kinsey, J. D., Kieber, D. J., Kiene, R. P., Rellinger,
A. N., and Motard-Côté, J.: Concentrations, biological uptake, and
respiration of dissolved acrylate and dimethylsulfoxide in the northern Gulf
of Mexico, Limnol. Oceanogr., 62, 1198–1218, 2017.
Vairavamurthy, A., Andreae, M. O., and Brooks, J. M.: Determination of
acrylic acid in aqueous samples by electron capture gas chromatography after
extraction with tri-n-octylphosphine oxide and derivatization with
pentafluorobenzyl bromide, Anal. Chem., 58, 2684–2687, 1986.
Wang, K.: Chracteristics of bacterial community in the sediments of the
Bohai Sea and Yellow Seas, revealed by 454-Pyrosequencing, MS thsis, Ocean
University of China, Qingdao, 2015.
Wang, P., Cao, H. Y., Chen, X. L., Li, C. Y., Li, P. Y., Zhang, X. Y., Qin,
Q. L., Todd, J. D., and Zhang, Y. Z.: Mechanistic insight into acrylate
metabolism and detoxification in marine
dimethylsulfoniopropionate-catabolizing bacteria, Mol. Microbiol.,
105, 674–688, 2017.
Wang, X., Cui, Z., Guo, Q., Han, X., and Wang, J.: Distribution of nutrients
and eutrophication assessment in the Bohai Sea of China, Chin. J.
Oceanol. Limn., 27, 177–183, 2009.
Wei, H., Sun, J., Moll, A., and Zhao, L.: Phytoplankton dynamics in the
Bohai Sea – observations and modelling, J. Marine Syst., 44,
233–251, 2004.
Wei, Q.-S., Liu, L., Zhan, R., Wei, X.-H., and Zang, J.-Y.: Distribution
features of the chemical parameters in the Southern Yellow Sea in summer,
Periodical of Ocean University of China, 40, 82–88, 2010.
Wolfe, G. V., Steinke, M., and Kirst, G. O.: Grazing-activated chemical
defence in a unicellular marine alga, Nature, 387, 894–897, 1997.
Wu, X., Liu, C. Y., and Li, P. F.: Photochemical transformation of acrylic
acid in seawater, Mar. Chem., 170, 29–36, 2015.
Wu, X., Li, P. F., Liu, C. Y., Zhang, H. H., Yang, G. P., Zhang, S. H., and
Zhu, M. X.: Biogeochemistry of Dimethylsulfide, Dimethylsulfoniopropionate,
and Acrylic Acid in the Changjiang Estuary and the East China Sea, J. Geophys. Res.-Oceans, 122, 10245–10261, 2017.
Yang, G. P., Song, Y. Z., Zhang, H. H., Li, C. X., and Wu, G. W.: Seasonal
variation and biogeochemical cycling of dimethylsulfide (DMS) and
dimethylsulfoniopropionate (DMSP) in the Yellow Sea and Bohai Sea, J. Geophys. Res.-Oceans, 119, 8897–8915, 2014.
Yang, G. P., Zhang, S. H., Zhang, H. H., Yang, J., and Liu, C. Y.:
Distribution of biogenic sulfur in the Bohai Sea and northern Yellow Sea and
its contribution to atmospheric sulfate aerosol in the late fall, Mar.
Chem., 169, 23–32, 2015a.
Yang, J., Yang, G., Zhang, H., and Zhang, S.: Spatial distribution of
dimethylsulfide and dimethylsulfoniopropionate in the Yellow Sea and Bohai
Sea during summer, Chin. J. Oceanol. Limn., 33,
1020–1038, 2015b.
Zhang, D.: The Study of Phytoplankton and Biosilicon in the Yellow Sea and
the Bohai Sea, MS thesis, Tianjin University of Science and Technology,
Tianjin, 2018.
Zindler, C., Peeken, I., Marandino, C. A., and Bange, H. W.: Environmental control on the variability of DMS and DMSP in the Mauritanian upwelling region, Biogeosciences, 9, 1041–1051, https://doi.org/10.5194/bg-9-1041-2012, 2012.
Short summary
Acrylic acid (AA) exhibited obvious spatial and temporal variations in the Bohai and Yellow seas. Strong biological production and abundant terrestrial inputs led to high AA in summer. Extremely high AA in sediments might result from the cleavage of intracellular DMSP and reduce bacterial metabolism. Degradation experiments of AA and DMSP proved other sources of AA and microbial consumption to be the key removal source. This study provided insightful information on the sulfur cycle these seas.
Acrylic acid (AA) exhibited obvious spatial and temporal variations in the Bohai and Yellow...
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