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Non-Redfieldian Dyn...
Non-Redfieldian Dynamics Explain Seasonal pCO2 Drawdown in the Gulf of Bothnia
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- Fransner, Filippa (author)
- Stockholms universitet,Meteorologiska institutionen (MISU)
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- Gustafsson, Erik (author)
- Stockholms universitet,Baltic Nest Institute
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Tedesco, Letizia (author)
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Vichi, Marcello (author)
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- Hordoir, Robinson (author)
- Swedish Meteorological and Hydrological Institute, Sweden
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- Roquet, Fabien (author)
- Stockholms universitet,Meteorologiska institutionen (MISU)
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Spilling, Kristian (author)
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Kuznetsov, Ivan (author)
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Eilola, Kari (author)
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- Mörth, Carl-Magnus (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Humborg, Christoph (author)
- Stockholms universitet,Baltic Nest Institute,University of Helsinki, Finland
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- Nycander, Jonas (author)
- Stockholms universitet,Meteorologiska institutionen (MISU)
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(creator_code:org_t)
- 2018
- 2018
- English.
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In: Journal of Geophysical Research - Oceans. - 2169-9275 .- 2169-9291. ; 123:1, s. 166-188
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- 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 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.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Keyword
- pCO2 drawdown
- modeling
- primary production
- coastal sea
- DOC
- stoichiometry
- atmosfärvetenskap och oceanografi
- Atmospheric Sciences and Oceanography
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Fransner, Filipp ...
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Gustafsson, Erik
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Tedesco, Letizia
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Vichi, Marcello
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Hordoir, Robinso ...
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Roquet, Fabien
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Spilling, Kristi ...
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Kuznetsov, Ivan
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Eilola, Kari
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Mörth, Carl-Magn ...
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Humborg, Christo ...
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Nycander, Jonas
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Oceanography Hyd ...
- Articles in the publication
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Journal of Geoph ...
- By the university
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Umeå University
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Stockholm University