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Ocean carbon cycling in the Indian Ocean: 1. Spatiotemporal variability of inorganic carbon and air-sea CO2 gas exchange

Ocean carbon cycling in the Indian Ocean: 1. Spatiotemporal variability of inorganic carbon and air-sea CO2 gas exchange
Ocean carbon cycling in the Indian Ocean: 1. Spatiotemporal variability of inorganic carbon and air-sea CO2 gas exchange
The spatiotemporal variability of upper ocean inorganic carbon parameters and air-sea CO2 exchange in the Indian Ocean was examined using inorganic carbon data collected as part of the World Ocean Circulation Experiment (WOCE) cruises in 1995. Multiple linear regression methods were used to interpolate and extrapolate the temporally and geographically limited inorganic carbon data set to the entire Indian Ocean basin using other climatological hydrographic and biogeochemical data. The spatiotemporal distributions of total carbon dioxide (TCO2), alkalinity, and seawater pCO2 were evaluated for the Indian Ocean and regions of interest including the Arabian Sea, Bay of Bengal, and 10°N–35°S zones. The Indian Ocean was a net source of CO2 to the atmosphere, and a net sea-to-air CO2 flux of +237 ± 132 Tg C yr?1 (+0.24 Pg C yr?1) was estimated. Regionally, the Arabian Sea, Bay of Bengal, and 10°N–10°S zones were perennial sources of CO2 to the atmosphere. In the 10°S–35°S zone, the CO2 sink or source status of the surface ocean shifts seasonally, although the region is a net oceanic sink of atmospheric CO2.
gas exchange, Indian Ocean, ocean carbon cycle
0886-6236
GB3020
Bates, Nicholas R.
954a83d6-8424-49e9-8acd-e606221c9c57
Pequignet, A. Christine
2286a932-3dea-44ba-8a5d-ca985363fb3b
Sabine, Christopher L.
d82a5502-359e-47f7-b5cd-ef6cf3be62f1
Bates, Nicholas R.
954a83d6-8424-49e9-8acd-e606221c9c57
Pequignet, A. Christine
2286a932-3dea-44ba-8a5d-ca985363fb3b
Sabine, Christopher L.
d82a5502-359e-47f7-b5cd-ef6cf3be62f1

Bates, Nicholas R., Pequignet, A. Christine and Sabine, Christopher L. (2006) Ocean carbon cycling in the Indian Ocean: 1. Spatiotemporal variability of inorganic carbon and air-sea CO2 gas exchange. Global Biogeochemical Cycles, 20 (3), GB3020. (doi:10.1029/2005GB002491).

Record type: Article

Abstract

The spatiotemporal variability of upper ocean inorganic carbon parameters and air-sea CO2 exchange in the Indian Ocean was examined using inorganic carbon data collected as part of the World Ocean Circulation Experiment (WOCE) cruises in 1995. Multiple linear regression methods were used to interpolate and extrapolate the temporally and geographically limited inorganic carbon data set to the entire Indian Ocean basin using other climatological hydrographic and biogeochemical data. The spatiotemporal distributions of total carbon dioxide (TCO2), alkalinity, and seawater pCO2 were evaluated for the Indian Ocean and regions of interest including the Arabian Sea, Bay of Bengal, and 10°N–35°S zones. The Indian Ocean was a net source of CO2 to the atmosphere, and a net sea-to-air CO2 flux of +237 ± 132 Tg C yr?1 (+0.24 Pg C yr?1) was estimated. Regionally, the Arabian Sea, Bay of Bengal, and 10°N–10°S zones were perennial sources of CO2 to the atmosphere. In the 10°S–35°S zone, the CO2 sink or source status of the surface ocean shifts seasonally, although the region is a net oceanic sink of atmospheric CO2.

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More information

Published date: September 2006
Keywords: gas exchange, Indian Ocean, ocean carbon cycle
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 358267
URI: http://eprints.soton.ac.uk/id/eprint/358267
ISSN: 0886-6236
PURE UUID: 5bd6945e-9523-4fd1-97fa-e6624d876e2d

Catalogue record

Date deposited: 02 Oct 2013 14:27
Last modified: 16 Jul 2019 21:21

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