On the influence of marine biogeochemical processes over CO2 exchange between the atmosphere and ocean
On the influence of marine biogeochemical processes over CO2 exchange between the atmosphere and ocean
复制标题
海洋生物地球化学过程对大气与海洋CO2交换的影响
DOI:
10.1016/j.marchem.2017.12.006
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发表时间:
2018
期刊:
影响因子:
3
通讯作者:
Humphreys M
中科院分区:
文献类型:
--
作者:
Humphreys M
The ocean holds a large reservoir of carbon dioxide (CO2), and mitigates climate change through uptake of anthropogenic CO2. Fluxes of CO2between the atmosphere and surface ocean are regulated by a number of physical and biogeochemical processes, resulting in a spatiotemporally heterogeneous CO2distribution. Determining the influence of each individual process is useful for interpreting marine carbonate system observations, and is also necessary to investigate how changes in these drivers could affect air-sea CO2exchange. Biogeochemical processes exert an influence primarily through modifying seawater dissolved inorganic carbon (CT) and total alkalinity (AT), thus changing the seawater partial pressure of CO2(psw). Here, we propose a novel conceptual framework through which the size of the CO2source or sink generated by any biogeochemical process, denoted Φ, can be evaluated. This is based on the ‘isocapnic quotient’ (Q), which defines the trajectory through (AT,CT) phase space for which there is no change inpsw. We discuss the limitations and uncertainties inherent in this technique, which are negligible for most practical purposes, and its links with existing, related approaches. We investigate the effect on Φ of spatiotemporal heterogeneity inQin the present day surface ocean for several key biogeochemical processes. This leads the magnitude of the CO2source or sink generated by processes that modifyATto vary spatiotemporally. Finally, we consider how the strength of each process as a CO2source or sink may change in a warmer, higher-CO2future ocean.
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DOI:
10.1016/j.dsr2.2008.12.009
发表时间:
2009-04-01
影响因子:
3
作者:
Takahashi, Taro;Sutherland, Stewart C.;de Baar, Hein J. W.
通讯作者:
de Baar, Hein J. W.
DOI:
--
发表时间:
2014
期刊:
影响因子:
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作者:
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DOI:
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发表时间:
1966-01-01
期刊:
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影响因子:
--
作者:
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通讯作者:
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影响因子:
56.9
作者:
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R. M. Pytkowicz
影响因子:
5.2
作者:
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通讯作者:
Madsen, Esben