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Spatio-temporal distribution of dissolved inorganic carbon and net community production in the Chukchi and Beaufort Seas

Spatio-temporal distribution of dissolved inorganic carbon and net community production in the Chukchi and Beaufort Seas
Spatio-temporal distribution of dissolved inorganic carbon and net community production in the Chukchi and Beaufort Seas
As part of the 2002 Western Arctic Shelf–Basin Interactions (SBI) project, spatio-temporal variability of dissolved inorganic carbon (DIC) was employed to determine rates of net community production (NCP) for the Chukchi and western Beaufort Sea shelf and slope, and Canada Basin of the Arctic Ocean. Seasonal and spatial distributions of DIC were characterized for all water masses (e.g., mixed layer, halocline waters, Atlantic layer, and deep Arctic Ocean) of the Chukchi Sea region during field investigations in spring (5 May–15 June 2002) and summer (15 July–25 August 2002). Between these periods, high rates of phytoplankton production resulted in large drawdown of inorganic nutrients and DIC in the Polar Mixed Layer (PML) and in the shallow depths of the Upper Halocline Layer (UHL). The highest rates of NCP (?1000–2850 mg C m?2 d?1) occurred on the shelf in the Barrow Canyon region of the Chukchi Sea and east of Barrow in the western Beaufort Sea. A total NCP rate of 8.9–17.8×1012 g for the growing season was estimated for the eastern Chukchi Sea shelf and slope region. Very low inorganic nutrient concentrations and low rates of NCP (?<15–25 mg C m?2 d?1) estimated for the mixed layer of the adjacent Arctic Ocean basin indicate that this area is perennially oligotrophic.
Ocean carbon cycle, Productivity, Remineralization, Chukchi Sea, Arctic Ocean
0967-0645
3303-3323
Bates, Nicholas R.
954a83d6-8424-49e9-8acd-e606221c9c57
Best, Margaret H.P.
87564721-c7c1-4a87-8273-5a38b7a9e5f6
Hansell, Dennis A.
d4f0a3af-ca20-4791-a794-e52cbd56d654
Bates, Nicholas R.
954a83d6-8424-49e9-8acd-e606221c9c57
Best, Margaret H.P.
87564721-c7c1-4a87-8273-5a38b7a9e5f6
Hansell, Dennis A.
d4f0a3af-ca20-4791-a794-e52cbd56d654

Bates, Nicholas R., Best, Margaret H.P. and Hansell, Dennis A. (2005) Spatio-temporal distribution of dissolved inorganic carbon and net community production in the Chukchi and Beaufort Seas. Deep Sea Research Part II: Topical Studies in Oceanography, 52 (24-26), 3303-3323.

Record type: Article

Abstract

As part of the 2002 Western Arctic Shelf–Basin Interactions (SBI) project, spatio-temporal variability of dissolved inorganic carbon (DIC) was employed to determine rates of net community production (NCP) for the Chukchi and western Beaufort Sea shelf and slope, and Canada Basin of the Arctic Ocean. Seasonal and spatial distributions of DIC were characterized for all water masses (e.g., mixed layer, halocline waters, Atlantic layer, and deep Arctic Ocean) of the Chukchi Sea region during field investigations in spring (5 May–15 June 2002) and summer (15 July–25 August 2002). Between these periods, high rates of phytoplankton production resulted in large drawdown of inorganic nutrients and DIC in the Polar Mixed Layer (PML) and in the shallow depths of the Upper Halocline Layer (UHL). The highest rates of NCP (?1000–2850 mg C m?2 d?1) occurred on the shelf in the Barrow Canyon region of the Chukchi Sea and east of Barrow in the western Beaufort Sea. A total NCP rate of 8.9–17.8×1012 g for the growing season was estimated for the eastern Chukchi Sea shelf and slope region. Very low inorganic nutrient concentrations and low rates of NCP (?<15–25 mg C m?2 d?1) estimated for the mixed layer of the adjacent Arctic Ocean basin indicate that this area is perennially oligotrophic.

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More information

Published date: December 2005
Keywords: Ocean carbon cycle, Productivity, Remineralization, Chukchi Sea, Arctic Ocean
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 358274
URI: https://eprints.soton.ac.uk/id/eprint/358274
ISSN: 0967-0645
PURE UUID: 0b8eaf1d-ce2f-404f-a0f5-e0cd1ff1c735

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Date deposited: 02 Oct 2013 15:47
Last modified: 04 Nov 2017 23:46

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Contributors

Author: Margaret H.P. Best
Author: Dennis A. Hansell

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