Recent Trends in SST, Chl-a, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre
The global upper ocean has been warming during the last decades accompanied with a chlorophyll-a (Chl-a) and productivity decrease. Whereas subtropical gyres show similar trends, Eastern Boundary Upwelling Systems are thought to increase in productivity due to increased trade winds. This study analy...
Published in: | Journal of Geophysical Research: Oceans |
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2021
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Online Access: | http://hdl.handle.net/10553/111917 https://doi.org/10.1029/2021JC017268 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/111917 2023-05-15T17:29:46+02:00 Recent Trends in SST, Chl-a, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre Siemer, J. P. Machín Jiménez, Francisco José González Vega, Alba Arrieta, J. M. Gutiérrez-Guerra, M. A. Pérez Hernández, María Dolores Vélez Belchí,Pedro Hernández Guerra, Alonso Fraile Nuez,Eugenio orcid:0000-0001-8676-2388 orcid:0000-0002-4281-6804 orcid:0000-0002-8683-9370 orcid:0000-0002-0190-6950 orcid:0000-0001-5445-9878 orcid:0000-0001-7293-9584 orcid:0000-0003-2404-5679 orcid:0000-0002-4883-8123 orcid:0000-0003-4250-4445 57233756800 6602804374 57214754744 7006984953 57234999100 50861902200 7801599223 6701736545 12139561900 BU-BAS 2021 http://hdl.handle.net/10553/111917 https://doi.org/10.1029/2021JC017268 eng eng Journal of geophysical research. Oceans 126 2169-9275 Scopus http://hdl.handle.net/10553/111917 doi:10.1029/2021JC017268 85113638135 2169-9291 8 Sí Journal of Geophysical Research: Oceans [ISSN 2169-9275], v. 126 (8), e2021JC017268, (Agosto 2021) 251008 Interacciones mar-aire Canary Upwelling System North Atlantic Subtropical Gyre Productivity Trends Sst Trends Upwelling Intensification Wind Trends info:eu-repo/semantics/Article Article 2021 ftunivlaspalmas https://doi.org/10.1029/2021JC017268 2021-10-19T23:14:23Z The global upper ocean has been warming during the last decades accompanied with a chlorophyll-a (Chl-a) and productivity decrease. Whereas subtropical gyres show similar trends, Eastern Boundary Upwelling Systems are thought to increase in productivity due to increased trade winds. This study analyzes recent trends in sea surface temperature (SST), Chl-a, net primary production (NPP) and meridional wind stress in the Eastern North Atlantic subtropical gyre (NASE) in order to examine if the global trends can be detected in open ocean and upwelling areas and how the ocean biota responds. Satellite data of such variables of the last 15–40 years were analyzed to calculate mean trends in upwelling areas in the Canary upwelling system and open ocean areas around the Azores, Madeira and the Canary Islands. Our results show significant warming in the area with a maximum of 2.7°C per century for the Azores. Moreover, a general decreasing trend for Chl-a and NPP seems to be more evident in the permanent upwelling areas, which will be responsible for a loss of 0.13% of the global NPP per century. Our results also highlight a significant expansion of the oceanic desert area of 10% with an increase in unproductive days of up to 84 days in the last 20 years. The competitive relationship of stratification and wind stress in the Canary upwelling system might be a more plausible explanation for the decrease in Chl-a and NPP in upwelling areas linked to the increase in upwelling favorable wind stress and the surface warming. 3,405 Q1 Article in Journal/Newspaper North Atlantic Universidad de Las Palmas de Gran Canaria: Acceda Journal of Geophysical Research: Oceans 126 8 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251008 Interacciones mar-aire Canary Upwelling System North Atlantic Subtropical Gyre Productivity Trends Sst Trends Upwelling Intensification Wind Trends |
spellingShingle |
251008 Interacciones mar-aire Canary Upwelling System North Atlantic Subtropical Gyre Productivity Trends Sst Trends Upwelling Intensification Wind Trends Siemer, J. P. Machín Jiménez, Francisco José González Vega, Alba Arrieta, J. M. Gutiérrez-Guerra, M. A. Pérez Hernández, María Dolores Vélez Belchí,Pedro Hernández Guerra, Alonso Fraile Nuez,Eugenio Recent Trends in SST, Chl-a, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre |
topic_facet |
251008 Interacciones mar-aire Canary Upwelling System North Atlantic Subtropical Gyre Productivity Trends Sst Trends Upwelling Intensification Wind Trends |
description |
The global upper ocean has been warming during the last decades accompanied with a chlorophyll-a (Chl-a) and productivity decrease. Whereas subtropical gyres show similar trends, Eastern Boundary Upwelling Systems are thought to increase in productivity due to increased trade winds. This study analyzes recent trends in sea surface temperature (SST), Chl-a, net primary production (NPP) and meridional wind stress in the Eastern North Atlantic subtropical gyre (NASE) in order to examine if the global trends can be detected in open ocean and upwelling areas and how the ocean biota responds. Satellite data of such variables of the last 15–40 years were analyzed to calculate mean trends in upwelling areas in the Canary upwelling system and open ocean areas around the Azores, Madeira and the Canary Islands. Our results show significant warming in the area with a maximum of 2.7°C per century for the Azores. Moreover, a general decreasing trend for Chl-a and NPP seems to be more evident in the permanent upwelling areas, which will be responsible for a loss of 0.13% of the global NPP per century. Our results also highlight a significant expansion of the oceanic desert area of 10% with an increase in unproductive days of up to 84 days in the last 20 years. The competitive relationship of stratification and wind stress in the Canary upwelling system might be a more plausible explanation for the decrease in Chl-a and NPP in upwelling areas linked to the increase in upwelling favorable wind stress and the surface warming. 3,405 Q1 |
author2 |
orcid:0000-0001-8676-2388 orcid:0000-0002-4281-6804 orcid:0000-0002-8683-9370 orcid:0000-0002-0190-6950 orcid:0000-0001-5445-9878 orcid:0000-0001-7293-9584 orcid:0000-0003-2404-5679 orcid:0000-0002-4883-8123 orcid:0000-0003-4250-4445 57233756800 6602804374 57214754744 7006984953 57234999100 50861902200 7801599223 6701736545 12139561900 BU-BAS |
format |
Article in Journal/Newspaper |
author |
Siemer, J. P. Machín Jiménez, Francisco José González Vega, Alba Arrieta, J. M. Gutiérrez-Guerra, M. A. Pérez Hernández, María Dolores Vélez Belchí,Pedro Hernández Guerra, Alonso Fraile Nuez,Eugenio |
author_facet |
Siemer, J. P. Machín Jiménez, Francisco José González Vega, Alba Arrieta, J. M. Gutiérrez-Guerra, M. A. Pérez Hernández, María Dolores Vélez Belchí,Pedro Hernández Guerra, Alonso Fraile Nuez,Eugenio |
author_sort |
Siemer, J. P. |
title |
Recent Trends in SST, Chl-a, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre |
title_short |
Recent Trends in SST, Chl-a, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre |
title_full |
Recent Trends in SST, Chl-a, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre |
title_fullStr |
Recent Trends in SST, Chl-a, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre |
title_full_unstemmed |
Recent Trends in SST, Chl-a, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre |
title_sort |
recent trends in sst, chl-a, productivity and wind stress in upwelling and open ocean areas in the upper eastern north atlantic subtropical gyre |
publishDate |
2021 |
url |
http://hdl.handle.net/10553/111917 https://doi.org/10.1029/2021JC017268 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of Geophysical Research: Oceans [ISSN 2169-9275], v. 126 (8), e2021JC017268, (Agosto 2021) |
op_relation |
Journal of geophysical research. Oceans 126 2169-9275 Scopus http://hdl.handle.net/10553/111917 doi:10.1029/2021JC017268 85113638135 2169-9291 8 Sí |
op_doi |
https://doi.org/10.1029/2021JC017268 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
8 |
_version_ |
1766124582012452864 |