Recent changes and trends of the upwelling intensity in the Canary Current Large Marine Ecosystem
We provide a summary of current knowledge for the recent trends of the coastal upwelling intensity in the region from 8°N to 43°N, computed from both wind and sea surface temperature (SST) remotely sensed, from 1982 to 2011. In particular, the impact of changes possibly linked to global warming is estimated in the form of spatial linear trends. Statistical analysis of trends and seasonal changes of the upwelling activity are carried out in order to verify the hypothesis of Bakun (1990), which anticipates an intensification of the upwelling favorable winds and therefore a cooling of coastal waters. Our study brings new insights on the spatial patterns of the changes. The results indicate distinct and questionable trends of the two categories of upwelling indices, in a region associated with a strong SST warming, especially in the southern part of the system. While the central and southern parts of the system display an increase of upwelling-favorable winds, no significant upwelling trend is found in the same sub-regions from SST-based upwelling indices. It is stated that changes in the internal structure of the upper ocean, as a result of global warming, may be responsible of such differences: a significant warming of the surface upwelled waters possibly combined with a thickening of the surface mixed layer.
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Formato: | Report Section biblioteca |
Idioma: | English |
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IOC-UNESCO
2015
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Assuntos: | Recent trends, SST-based upwelling index, CCLME, ASFA15::R::Remote sensing, ASFA15::G::Global warming, ASFA15::U::Upper ocean, |
Acesso em linha: | http://hdl.handle.net/1834/9198 |
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dig-aquadocs-1834-91982021-05-19T07:02:02Z Recent changes and trends of the upwelling intensity in the Canary Current Large Marine Ecosystem Trends of the upwelling intensity in the CCLME Oceanographic and biological features in the Canary Current Large Marine Ecosystem. Benazzouz, Aïssa Demarcq, Hervé González-Nuevo, Gonzalo Valdés, Luis Déniz-González, Itahisa Recent trends SST-based upwelling index CCLME ASFA15::R::Remote sensing ASFA15::G::Global warming ASFA15::U::Upper ocean We provide a summary of current knowledge for the recent trends of the coastal upwelling intensity in the region from 8°N to 43°N, computed from both wind and sea surface temperature (SST) remotely sensed, from 1982 to 2011. In particular, the impact of changes possibly linked to global warming is estimated in the form of spatial linear trends. Statistical analysis of trends and seasonal changes of the upwelling activity are carried out in order to verify the hypothesis of Bakun (1990), which anticipates an intensification of the upwelling favorable winds and therefore a cooling of coastal waters. Our study brings new insights on the spatial patterns of the changes. The results indicate distinct and questionable trends of the two categories of upwelling indices, in a region associated with a strong SST warming, especially in the southern part of the system. While the central and southern parts of the system display an increase of upwelling-favorable winds, no significant upwelling trend is found in the same sub-regions from SST-based upwelling indices. It is stated that changes in the internal structure of the upper ocean, as a result of global warming, may be responsible of such differences: a significant warming of the surface upwelled waters possibly combined with a thickening of the surface mixed layer. Published 2016-07-28T11:49:10Z 2016-07-28T11:49:10Z 2015 Report Section Refereed http://hdl.handle.net/1834/9198 en Intergovernmental Oceanographic Commission, Technical Series: 115; http://www.unesco.org/new/en/ioc/ts115 pp. 321-330 Northwest Africa Canary Current IOC-UNESCO Paris, France |
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Recent trends SST-based upwelling index CCLME ASFA15::R::Remote sensing ASFA15::G::Global warming ASFA15::U::Upper ocean Recent trends SST-based upwelling index CCLME ASFA15::R::Remote sensing ASFA15::G::Global warming ASFA15::U::Upper ocean |
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Recent trends SST-based upwelling index CCLME ASFA15::R::Remote sensing ASFA15::G::Global warming ASFA15::U::Upper ocean Recent trends SST-based upwelling index CCLME ASFA15::R::Remote sensing ASFA15::G::Global warming ASFA15::U::Upper ocean Benazzouz, Aïssa Demarcq, Hervé González-Nuevo, Gonzalo Recent changes and trends of the upwelling intensity in the Canary Current Large Marine Ecosystem |
description |
We provide a summary of current knowledge for the recent trends of the coastal upwelling intensity in the region from 8°N to 43°N, computed from both wind and sea surface temperature (SST) remotely sensed, from 1982 to 2011. In particular, the impact of changes possibly linked to global warming is estimated in the form of spatial linear trends. Statistical analysis of trends and seasonal changes of the upwelling activity are carried out in order to verify the hypothesis of Bakun (1990), which anticipates an intensification of the upwelling favorable winds and therefore a cooling of coastal waters. Our study brings new insights on the spatial patterns of the changes.
The results indicate distinct and questionable trends of the two categories of upwelling indices, in a region associated with a strong SST warming, especially in the southern part of the system.
While the central and southern parts of the system display an increase of upwelling-favorable winds, no significant upwelling trend is found in the same sub-regions from SST-based upwelling indices.
It is stated that changes in the internal structure of the upper ocean, as a result of global warming, may be responsible of such differences: a significant warming of the surface upwelled waters possibly combined with a thickening of the surface mixed layer. |
author2 |
Valdés, Luis |
author_facet |
Valdés, Luis Benazzouz, Aïssa Demarcq, Hervé González-Nuevo, Gonzalo |
format |
Report Section |
topic_facet |
Recent trends SST-based upwelling index CCLME ASFA15::R::Remote sensing ASFA15::G::Global warming ASFA15::U::Upper ocean |
author |
Benazzouz, Aïssa Demarcq, Hervé González-Nuevo, Gonzalo |
author_sort |
Benazzouz, Aïssa |
title |
Recent changes and trends of the upwelling intensity in the Canary Current Large Marine Ecosystem |
title_short |
Recent changes and trends of the upwelling intensity in the Canary Current Large Marine Ecosystem |
title_full |
Recent changes and trends of the upwelling intensity in the Canary Current Large Marine Ecosystem |
title_fullStr |
Recent changes and trends of the upwelling intensity in the Canary Current Large Marine Ecosystem |
title_full_unstemmed |
Recent changes and trends of the upwelling intensity in the Canary Current Large Marine Ecosystem |
title_sort |
recent changes and trends of the upwelling intensity in the canary current large marine ecosystem |
publisher |
IOC-UNESCO |
publishDate |
2015 |
url |
http://hdl.handle.net/1834/9198 |
work_keys_str_mv |
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_version_ |
1756077030601916416 |