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Coccolithophore bloom size variation in response to the regional environment of the subarctic North Atlantic

Coccolithophore bloom size variation in response to the regional environment of the subarctic North Atlantic
Coccolithophore bloom size variation in response to the regional environment of the subarctic North Atlantic
Several environmental/physical variables derived from satellite and in situ data sets were used to understand the variability of coccolithophore abundance in the subarctic North Atlantic. The 7-yr (1997–2004) time-series analysis showed that the combined effects of high solar radiation, shallow mixed layer depth (<20 m), and increased temperatures explained >89% of the coccolithophore variation. The June 1998 bloom, which was associated with high light intensity, unusually high sea-surface temperature, and a very shallow mixed layer, was found to be one of the most extensive (>995,000 km2) blooms ever recorded. There was a pronounced sea-surface temperature shift in the mid-1990s with a peak in 1998, suggesting that exceptionally large blooms are caused by pronounced environmental conditions and the variability of the physical environment strongly affects the spatial extent of these blooms. Consequently, if the physical environment varies, the effects of these blooms on the atmospheric and oceanic environment will vary as well.
0024-3590
2122-2130
Raitsos, D.E.
d1fe8ff0-712e-4c4d-8a51-abc00689a373
Lavender, S.J.
49e5ad52-9ddf-4973-b439-b644232bb696
Pradhan, Y.
3fea0a33-97cc-4dbd-8195-9552534f3637
Tyrrell, T.
6808411d-c9cf-47a3-88b6-c7c294f2d114
Reid, P.C.
19af6dfe-2fb2-4923-93c6-c057e940eedd
Edwards, M.
c9675e8c-09da-42df-be29-6be2dd524822
Raitsos, D.E.
d1fe8ff0-712e-4c4d-8a51-abc00689a373
Lavender, S.J.
49e5ad52-9ddf-4973-b439-b644232bb696
Pradhan, Y.
3fea0a33-97cc-4dbd-8195-9552534f3637
Tyrrell, T.
6808411d-c9cf-47a3-88b6-c7c294f2d114
Reid, P.C.
19af6dfe-2fb2-4923-93c6-c057e940eedd
Edwards, M.
c9675e8c-09da-42df-be29-6be2dd524822

Raitsos, D.E., Lavender, S.J., Pradhan, Y., Tyrrell, T., Reid, P.C. and Edwards, M. (2006) Coccolithophore bloom size variation in response to the regional environment of the subarctic North Atlantic. Limnology and Oceanography, 51 (5), 2122-2130.

Record type: Article

Abstract

Several environmental/physical variables derived from satellite and in situ data sets were used to understand the variability of coccolithophore abundance in the subarctic North Atlantic. The 7-yr (1997–2004) time-series analysis showed that the combined effects of high solar radiation, shallow mixed layer depth (<20 m), and increased temperatures explained >89% of the coccolithophore variation. The June 1998 bloom, which was associated with high light intensity, unusually high sea-surface temperature, and a very shallow mixed layer, was found to be one of the most extensive (>995,000 km2) blooms ever recorded. There was a pronounced sea-surface temperature shift in the mid-1990s with a peak in 1998, suggesting that exceptionally large blooms are caused by pronounced environmental conditions and the variability of the physical environment strongly affects the spatial extent of these blooms. Consequently, if the physical environment varies, the effects of these blooms on the atmospheric and oceanic environment will vary as well.

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More information

Published date: 2006

Identifiers

Local EPrints ID: 45986
URI: http://eprints.soton.ac.uk/id/eprint/45986
ISSN: 0024-3590
PURE UUID: 309579d5-5f2d-46a6-9bae-59f4a209554e
ORCID for T. Tyrrell: ORCID iD orcid.org/0000-0002-1002-1716

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Date deposited: 04 May 2007
Last modified: 10 Jan 2022 02:38

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Contributors

Author: D.E. Raitsos
Author: S.J. Lavender
Author: Y. Pradhan
Author: T. Tyrrell ORCID iD
Author: P.C. Reid
Author: M. Edwards

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