Coccolithophorid blooms in the global ocean
The global distribution pattern of coccolithophorid blooms was mapped in order to ascertain the prevalence of these blooms in the world's oceans and to estimate their worldwide production of CaCO3 and dimethyl sulfide (DMS). Mapping was accomplished by classifying pixels of 5â€day global compos...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1193 2024-09-15T18:23:55+00:00 Coccolithophorid blooms in the global ocean Brown, Christopher W. Yoder, James A. 1994-01-01T08:00:00Z application/pdf https://digitalcommons.uri.edu/gsofacpubs/687 https://doi.org/10.1029/93JC02156 https://digitalcommons.uri.edu/context/gsofacpubs/article/1193/viewcontent/Brown_Yoder_Coccolithophorid_1994.pdf unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/687 doi:10.1029/93JC02156 https://digitalcommons.uri.edu/context/gsofacpubs/article/1193/viewcontent/Brown_Yoder_Coccolithophorid_1994.pdf Graduate School of Oceanography Faculty Publications text 1994 ftunivrhodeislan https://doi.org/10.1029/93JC02156 2024-08-21T00:09:33Z The global distribution pattern of coccolithophorid blooms was mapped in order to ascertain the prevalence of these blooms in the world's oceans and to estimate their worldwide production of CaCO3 and dimethyl sulfide (DMS). Mapping was accomplished by classifying pixels of 5â€day global composites of coastal zone color scanner imagery into bloom and nonbloom classes using a supervised, multispectral classification scheme. Surface waters with the spectral signature of coccolithophorid blooms annually covered an average of 1.4×106 km2 in the world oceans from 1979 to 1985, with the subpolar latitudes accounting for 71% of this surface area. Classified blooms were most extensive in the Subarctic North Atlantic. Large expanses of the bloom signal were also detected in the North Pacific, on the Argentine shelf and slope, and in numerous lower latitude marginal seas and shelf regions. The greatest spatial extent of classified blooms in subpolar oceanic regions occurred in the months from summer to early autumn, while those in lower latitude marginal seas occurred in midwinter to early spring. Though the classification scheme was efficient in separating bloom and nonbloom classes during test simulations, and biogeographical literature generally confirms the resulting distribution pattern of blooms in the subpolar regions, the cause of the bloom signal is equivocal in some geographic areas, particularly on shelf regions at lower latitudes. Standing stock estimates suggest that the presumed Emiliania huxleyi blooms act as a significant source of calcite carbon and DMS sulfur on a regional scale. On a global scale, however, the satelliteâ€detected coccolithophorid blooms are estimated to play only a minor role in the annual production of these two compounds and their flux from the surface mixed layer. Text North Atlantic Subarctic University of Rhode Island: DigitalCommons@URI Journal of Geophysical Research 99 C4 7467 |
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Open Polar |
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University of Rhode Island: DigitalCommons@URI |
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ftunivrhodeislan |
language |
unknown |
description |
The global distribution pattern of coccolithophorid blooms was mapped in order to ascertain the prevalence of these blooms in the world's oceans and to estimate their worldwide production of CaCO3 and dimethyl sulfide (DMS). Mapping was accomplished by classifying pixels of 5â€day global composites of coastal zone color scanner imagery into bloom and nonbloom classes using a supervised, multispectral classification scheme. Surface waters with the spectral signature of coccolithophorid blooms annually covered an average of 1.4×106 km2 in the world oceans from 1979 to 1985, with the subpolar latitudes accounting for 71% of this surface area. Classified blooms were most extensive in the Subarctic North Atlantic. Large expanses of the bloom signal were also detected in the North Pacific, on the Argentine shelf and slope, and in numerous lower latitude marginal seas and shelf regions. The greatest spatial extent of classified blooms in subpolar oceanic regions occurred in the months from summer to early autumn, while those in lower latitude marginal seas occurred in midwinter to early spring. Though the classification scheme was efficient in separating bloom and nonbloom classes during test simulations, and biogeographical literature generally confirms the resulting distribution pattern of blooms in the subpolar regions, the cause of the bloom signal is equivocal in some geographic areas, particularly on shelf regions at lower latitudes. Standing stock estimates suggest that the presumed Emiliania huxleyi blooms act as a significant source of calcite carbon and DMS sulfur on a regional scale. On a global scale, however, the satelliteâ€detected coccolithophorid blooms are estimated to play only a minor role in the annual production of these two compounds and their flux from the surface mixed layer. |
format |
Text |
author |
Brown, Christopher W. Yoder, James A. |
spellingShingle |
Brown, Christopher W. Yoder, James A. Coccolithophorid blooms in the global ocean |
author_facet |
Brown, Christopher W. Yoder, James A. |
author_sort |
Brown, Christopher W. |
title |
Coccolithophorid blooms in the global ocean |
title_short |
Coccolithophorid blooms in the global ocean |
title_full |
Coccolithophorid blooms in the global ocean |
title_fullStr |
Coccolithophorid blooms in the global ocean |
title_full_unstemmed |
Coccolithophorid blooms in the global ocean |
title_sort |
coccolithophorid blooms in the global ocean |
publisher |
DigitalCommons@URI |
publishDate |
1994 |
url |
https://digitalcommons.uri.edu/gsofacpubs/687 https://doi.org/10.1029/93JC02156 https://digitalcommons.uri.edu/context/gsofacpubs/article/1193/viewcontent/Brown_Yoder_Coccolithophorid_1994.pdf |
genre |
North Atlantic Subarctic |
genre_facet |
North Atlantic Subarctic |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/687 doi:10.1029/93JC02156 https://digitalcommons.uri.edu/context/gsofacpubs/article/1193/viewcontent/Brown_Yoder_Coccolithophorid_1994.pdf |
op_doi |
https://doi.org/10.1029/93JC02156 |
container_title |
Journal of Geophysical Research |
container_volume |
99 |
container_issue |
C4 |
container_start_page |
7467 |
_version_ |
1810464201723871232 |