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A window for carbon uptake in the southern subtropical Indian Ocean

Valsala, V and Maksyutov, S and Murtugudde, R (2012) A window for carbon uptake in the southern subtropical Indian Ocean. Geophysical Research Letters, 39 (17).

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Abstract

1 Atmospheric CO 2 sinks in the southern Indian Ocean was examined for their seasonal, interannual and interdecadal variability. Two distinct zones of CO 2 uptake are identified; located in the 15°S-35°S band is the northern box where CO 2 uptake is dominated by the solubility pump, and in the latitudinal range of 35°S-50°S is the southern box where both the solubility and biological pump are equal players. The anthropogenic CO 2 inventories appear to be a result of deepening subduction of CO 2 and subsequent invasion into the northern domain. The seasonal and interannual variability of CO 2 sinks to the north are rather surface trapped, while the deep CO 2 variability is found to be coherent with the atmospheric forcing, consistent with decadal wind stress curl anomalies. This is a step towards separating the secular trends of deep ocean CO 2 from its natural variability in the analysis region.

Item Type: Article
Additional Information: Copyright of this article belongs to American Geophysical Union.
Uncontrolled Keywords: Atmospheric CO; Atmospheric forcing; Biological pumps; Carbon uptake; Deep ocean; Indian ocean; Inter-decadal variability; Interannual; Latitudinal range; Natural variability; Seasonal and interannual variability; Secular trend; Southern indian ocean; Wind stress curl, Atmospheric chemistry; Forestry; Solubility, Carbon dioxide, annual variation; atmospheric forcing; biological pump; carbon dioxide; carbon sink; decadal variation; deep sea; seasonal variation; solubility; subduction; wind stress, Indian Ocean; Indian Ocean (South)
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 04 Jan 2014 19:54
Last Modified: 04 Jan 2014 19:54
URI: http://moeseprints.incois.gov.in/id/eprint/442

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