Annual balance and seasonal variability of sea-air CO2 fluxes in the Patagonia Sea: Their relationship with fronts and chlorophyll distribution
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Author
Bianchi, A.Pino, D.
Perlender, H.
Osiroff, A.
Segura, V.
Lutz, V.
Clara, M.
Balestrini, C.
Piola, A.
Date
2009
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Show full item recordAbstract
Sea-air differences of CO2partial pressures (DpCO2) and surface chlorophyll a (chl-a)concentration have been determined during 22 cruises in various seasons for 2000–2006over the Patagonia Sea and shelf break. From spring to autumn, the nearshore waters act as asource of atmospheric CO2, while the midshelf and slope are a CO2sink, leading to highlynegative areal means of sea-air CO2flux and DpCO2. The DpCO2and CO2flux in springreach values of 67 matm and 7 103mol m2d1, respectively, and are close toequilibrium in winter. Sea-air DpCO2and chl-a over the shelf are negatively correlated,suggesting that photosynthesis is one of the main processes responsible for the largeCO2sequestration. The annual areal mean DpCO2and sea-air CO2flux are 31 matmand 3.7 103mol m2d1, respectively, indicating that the Patagonia Sea is one ofthe strongest CO2sinks per unit area in the World Ocean.Journal
Journal of Geophysical ResearchVolume
114Issue/Article Nr
C3Page Range
pp.1-11ae974a485f413a2113503eed53cd6c53
https://doi.org/10.1029/2008JC004854
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