Strong CO2 emissions from the Arabian Sea during South-West Monsoon.

Körtzinger, Arne , Duinker, Jan C. and Mintrop, Ludger (1997) Strong CO2 emissions from the Arabian Sea during South-West Monsoon. Open Access Geophysical Research Letters, 24 . pp. 1763-1766. DOI 10.1029/97GL01775.

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The partial pressure of CO2 (pCO2) was measured during the 1995 South-West Monsoon in the Arabian Sea. The Arabian Sea was characterized throughout by a moderate supersaturation of 12–30 µatm. The stable atmospheric pCO2 level was around 345 µatm. An extreme supersaturation was found in areas of coastal upwelling off the Omani coast with pCO2 peak values in surface waters of 750 µatm. Such two-fold saturation (218%) is rarely found elsewhere in open ocean environments. We also encountered cold upwelled water 300 nm off the Omani coast in the region of Ekman pumping, which was also characterized by a strongly elevated seawater pCO2 of up to 525 µatm. Due to the strong monsoonal wind forcing the Arabian Sea as a whole and the areas of upwelling in particular represent a significant source of atmospheric CO2 with flux densities from around 2 mmol m−2 d−1 in the open ocean to 119 mmol m−2 d−1 in coastal upwelling. Local air masses passing the area of coastal upwelling showed increasing CO2 concentrations, which are consistent with such strong emissions.

Document Type: Article
Keywords: CO2 emissions, Arabian Sea, South-West Monsoon
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/97GL01775
ISSN: 0094-8276
Date Deposited: 18 Feb 2008 17:24
Last Modified: 13 Feb 2018 13:06

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