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Ocean carbon cycling in the Indian Ocean: 2. Estimates of net community production

Ocean carbon cycling in the Indian Ocean: 2. Estimates of net community production
Ocean carbon cycling in the Indian Ocean: 2. Estimates of net community production
The spatiotemporal variability of ocean carbon cycling 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. Several carbon mass balance approaches were used to estimate rates of net community production (NCP) in the Indian Ocean. Carbon transports into and out of the Indian Ocean were derived using mass transport estimates of Robbins and Toole (1997) and Schmitz (1996), and transoceanic hydrographic and TCO2 sections at 32°S and across the Indonesian Throughflow. The derived NCP rates of 749 ± 227 to 1572 ± 180 Tg C yr?1 (0.75–1.57 Pg C yr?1) estimated by carbon mass balance were similar to new production rates (1100–1800 Tg C yr?1) determined for the Indian Ocean by a variety of other methods (Louanchi and Najjar, 2000; Gnanadesikan et al., 2002). Changes in carbon inventories of the surface layer were also used to evaluate the spatiotemporal patterns of NCP. Significant NCP occurred in all regions during the Northeast Monsoon and Spring Intermonsoon periods. During the Southwest Monsoon and Fall Intermonsoon periods, the trophic status appears to shift from net autotrophy to net heterotrophy, particularly in the Arabian Sea, Bay of Bengal, and 10°N to 10°S zones
ndian Ocean, ocean carbon cycle, productivity
0886-6236
GB3021
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: 2. Estimates of net community production. Global Biogeochemical Cycles, 20 (3), GB3021. (doi:10.1029/2005GB002492).

Record type: Article

Abstract

The spatiotemporal variability of ocean carbon cycling 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. Several carbon mass balance approaches were used to estimate rates of net community production (NCP) in the Indian Ocean. Carbon transports into and out of the Indian Ocean were derived using mass transport estimates of Robbins and Toole (1997) and Schmitz (1996), and transoceanic hydrographic and TCO2 sections at 32°S and across the Indonesian Throughflow. The derived NCP rates of 749 ± 227 to 1572 ± 180 Tg C yr?1 (0.75–1.57 Pg C yr?1) estimated by carbon mass balance were similar to new production rates (1100–1800 Tg C yr?1) determined for the Indian Ocean by a variety of other methods (Louanchi and Najjar, 2000; Gnanadesikan et al., 2002). Changes in carbon inventories of the surface layer were also used to evaluate the spatiotemporal patterns of NCP. Significant NCP occurred in all regions during the Northeast Monsoon and Spring Intermonsoon periods. During the Southwest Monsoon and Fall Intermonsoon periods, the trophic status appears to shift from net autotrophy to net heterotrophy, particularly in the Arabian Sea, Bay of Bengal, and 10°N to 10°S zones

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More information

Published date: September 2006
Keywords: ndian Ocean, ocean carbon cycle, productivity
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 358265
URI: http://eprints.soton.ac.uk/id/eprint/358265
ISSN: 0886-6236
PURE UUID: e663df2c-1bb8-4176-84bf-c52edef5ab8a

Catalogue record

Date deposited: 02 Oct 2013 14:23
Last modified: 16 Jul 2019 21:21

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