globalchange  > 气候减缓与适应
DOI: 10.1002/2017JC013019
Scopus记录号: 2-s2.0-85040164129
论文题名:
Non-Redfieldian Dynamics Explain Seasonal pCO2 Drawdown in the Gulf of Bothnia
作者: Fransner F.; Gustafsson E.; Tedesco L.; Vichi M.; Hordoir R.; Roquet F.; Spilling K.; Kuznetsov I.; Eilola K.; Mörth C.-M.; Humborg C.; Nycander J.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期:1
起始页码: 166
结束页码: 188
语种: 英语
英文关键词: coastal sea ; DOC ; modeling ; pCO2 drawdown ; primary production ; stoichiometry
Scopus关键词: air-sea interaction ; carbon dioxide ; coastal zone ; dissolved organic carbon ; gas exchange ; nutrient dynamics ; organic matter ; partial pressure ; phytoplankton ; primary production ; Redfield ratio ; seasonal variation ; stoichiometry ; Atlantic Ocean ; Baltic Sea ; Gulf of Bothnia ; Redfieldia
英文摘要: High inputs of nutrients and organic matter make coastal seas places of intense air-sea CO2 exchange. Due to their complexity, the role of coastal seas in the global air-sea CO2 exchange is, however, still uncertain. Here, we investigate the role of phytoplankton stoichiometric flexibility and extracellular DOC production for the seasonal nutrient and CO2 partial pressure (pCO2) dynamics in the Gulf of Bothnia, Northern Baltic Sea. A 3-D ocean biogeochemical-physical model with variable phytoplankton stoichiometry is for the first time implemented in the area and validated against observations. By simulating non-Redfieldian internal phytoplankton stoichiometry, and a relatively large production of extracellular dissolved organic carbon (DOC), the model adequately reproduces observed seasonal cycles in macronutrients and pCO2. The uptake of atmospheric CO2 is underestimated by 50% if instead using the Redfield ratio to determine the carbon assimilation, as in other Baltic Sea models currently in use. The model further suggests, based on the observed drawdown of pCO2, that observational estimates of organic carbon production in the Gulf of Bothnia, derived with the 14C method, may be heavily underestimated. We conclude that stoichiometric variability and uncoupling of carbon and nutrient assimilation have to be considered in order to better understand the carbon cycle in coastal seas. © 2017. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114826
Appears in Collections:气候减缓与适应

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作者单位: Department of Meteorology, Stockholm University, Stockholm, Sweden; Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Baltic Nest Institute, Baltic Sea Centre, Stockholm University, Stockholm, Sweden; Finnish Environment Institute, Marine Research Centre, Helsinki, Finland; Department of Oceanography, University of Cape Town, Cape Town, South Africa; Marine Research Institute, University of Cape Town, Cape Town, South Africa; Swedish Meteorological and Hydrological Institute, Norrköping, Sweden; Institute of Coastal Research, Helmholtz-Zentrum Geesthacht, Geesthacht, Germany; Department of Geological Sciences, Stockholm University, Stockholm, Sweden; Faculty of Biological and Environmental Sciences, Tvärminne Zoological Station, University of Helsinki, Hanko, Finland

Recommended Citation:
Fransner F.,Gustafsson E.,Tedesco L.,et al. Non-Redfieldian Dynamics Explain Seasonal pCO2 Drawdown in the Gulf of Bothnia[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(1)
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