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Thermocline Regulated Seasonal Evolution of Surface Chlorophyll in the Gulf of Aden
The Gulf of Aden, although subject to seasonally reversing monsoonal winds, has been previously reported as an oligotrophic basin during summer, with elevated chlorophyll concentrations only occurring during winter due to convective mixing. However, the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4366251/ https://www.ncbi.nlm.nih.gov/pubmed/25789465 http://dx.doi.org/10.1371/journal.pone.0119951 |
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author | Yao, Fengchao Hoteit, Ibrahim |
author_facet | Yao, Fengchao Hoteit, Ibrahim |
author_sort | Yao, Fengchao |
collection | PubMed |
description | The Gulf of Aden, although subject to seasonally reversing monsoonal winds, has been previously reported as an oligotrophic basin during summer, with elevated chlorophyll concentrations only occurring during winter due to convective mixing. However, the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) ocean color data reveal that the Gulf of Aden also exhibits a prominent summer chlorophyll bloom and sustains elevated chlorophyll concentrations throughout the fall, and is a biophysical province distinct from the adjacent Arabian Sea. Climatological hydrographic data suggest that the thermocline, hence the nutricline, in the entire gulf is markedly shoaled by the southwest monsoon during summer and fall. Under this condition, cyclonic eddies in the gulf can effectively pump deep nutrients to the surface layer and lead to the chlorophyll bloom in late summer, and, after the transition to the northeast monsoon in fall, coastal upwelling driven by the northeasterly winds produces a pronounced increase in surface chlorophyll concentrations along the Somali coast. |
format | Online Article Text |
id | pubmed-4366251 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-43662512015-03-23 Thermocline Regulated Seasonal Evolution of Surface Chlorophyll in the Gulf of Aden Yao, Fengchao Hoteit, Ibrahim PLoS One Research Article The Gulf of Aden, although subject to seasonally reversing monsoonal winds, has been previously reported as an oligotrophic basin during summer, with elevated chlorophyll concentrations only occurring during winter due to convective mixing. However, the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) ocean color data reveal that the Gulf of Aden also exhibits a prominent summer chlorophyll bloom and sustains elevated chlorophyll concentrations throughout the fall, and is a biophysical province distinct from the adjacent Arabian Sea. Climatological hydrographic data suggest that the thermocline, hence the nutricline, in the entire gulf is markedly shoaled by the southwest monsoon during summer and fall. Under this condition, cyclonic eddies in the gulf can effectively pump deep nutrients to the surface layer and lead to the chlorophyll bloom in late summer, and, after the transition to the northeast monsoon in fall, coastal upwelling driven by the northeasterly winds produces a pronounced increase in surface chlorophyll concentrations along the Somali coast. Public Library of Science 2015-03-19 /pmc/articles/PMC4366251/ /pubmed/25789465 http://dx.doi.org/10.1371/journal.pone.0119951 Text en © 2015 Yao, Hoteit http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Yao, Fengchao Hoteit, Ibrahim Thermocline Regulated Seasonal Evolution of Surface Chlorophyll in the Gulf of Aden |
title | Thermocline Regulated Seasonal Evolution of Surface Chlorophyll in the Gulf of Aden |
title_full | Thermocline Regulated Seasonal Evolution of Surface Chlorophyll in the Gulf of Aden |
title_fullStr | Thermocline Regulated Seasonal Evolution of Surface Chlorophyll in the Gulf of Aden |
title_full_unstemmed | Thermocline Regulated Seasonal Evolution of Surface Chlorophyll in the Gulf of Aden |
title_short | Thermocline Regulated Seasonal Evolution of Surface Chlorophyll in the Gulf of Aden |
title_sort | thermocline regulated seasonal evolution of surface chlorophyll in the gulf of aden |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4366251/ https://www.ncbi.nlm.nih.gov/pubmed/25789465 http://dx.doi.org/10.1371/journal.pone.0119951 |
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