Trends in coastal upwelling intensity during the late 20th century
This study presents linear trends of coastal upwelling intensity in the later part of the 20th century (1960–2001) employing various indices of upwelling, derived from meridional wind stress and sea surface temperature. The analysis was conducted in the four major coastal upwelling regions in the wo...
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ftdoajarticles:oai:doaj.org/article:64c98124eb8a4e8b81de5ace17661e38 2023-05-15T17:34:29+02:00 Trends in coastal upwelling intensity during the late 20th century N. Narayan A. Paul S. Mulitza M. Schulz 2010-09-01T00:00:00Z https://doi.org/10.5194/os-6-815-2010 https://doaj.org/article/64c98124eb8a4e8b81de5ace17661e38 EN eng Copernicus Publications http://www.ocean-sci.net/6/815/2010/os-6-815-2010.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 doi:10.5194/os-6-815-2010 1812-0784 1812-0792 https://doaj.org/article/64c98124eb8a4e8b81de5ace17661e38 Ocean Science, Vol 6, Iss 3, Pp 815-823 (2010) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2010 ftdoajarticles https://doi.org/10.5194/os-6-815-2010 2022-12-31T00:55:01Z This study presents linear trends of coastal upwelling intensity in the later part of the 20th century (1960–2001) employing various indices of upwelling, derived from meridional wind stress and sea surface temperature. The analysis was conducted in the four major coastal upwelling regions in the world, which are off North-West Africa, Lüderitz, California and Peru. The trends in meridional wind stress showed a steady increase of intensity from 1960–2001, which was also reflected in the SST index calculated for the same time period. The steady cooling observed in the instrumental records of SST off California substantiated this observation further. It was also noted that the trends in meridional wind stress obtained from different datasets differ substantially from each other. Correlation analysis showed that basin-scale oscillations like the Atlantic Multidecadal Oscillation (AMO) and the Pacific Decadal Oscillation (PDO) could not be directly linked to the observed increase of upwelling intensity off NW Africa and California respectively. The relationship of the North Atlantic Oscillation (NAO) with coastal upwelling off NW Africa turned out to be ambiguous due to a negative correlation between the NAO index and the meridional wind stress and a lack of correlation with the SST index. Our results give additional support to the hypothesis that the coastal upwelling intensity increases globally because of raising greenhouse gas concentrations in the atmosphere and an associated increase of the land-sea pressure gradient and meridional wind stress. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Pacific Ocean Science 6 3 815 823 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 N. Narayan A. Paul S. Mulitza M. Schulz Trends in coastal upwelling intensity during the late 20th century |
topic_facet |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
description |
This study presents linear trends of coastal upwelling intensity in the later part of the 20th century (1960–2001) employing various indices of upwelling, derived from meridional wind stress and sea surface temperature. The analysis was conducted in the four major coastal upwelling regions in the world, which are off North-West Africa, Lüderitz, California and Peru. The trends in meridional wind stress showed a steady increase of intensity from 1960–2001, which was also reflected in the SST index calculated for the same time period. The steady cooling observed in the instrumental records of SST off California substantiated this observation further. It was also noted that the trends in meridional wind stress obtained from different datasets differ substantially from each other. Correlation analysis showed that basin-scale oscillations like the Atlantic Multidecadal Oscillation (AMO) and the Pacific Decadal Oscillation (PDO) could not be directly linked to the observed increase of upwelling intensity off NW Africa and California respectively. The relationship of the North Atlantic Oscillation (NAO) with coastal upwelling off NW Africa turned out to be ambiguous due to a negative correlation between the NAO index and the meridional wind stress and a lack of correlation with the SST index. Our results give additional support to the hypothesis that the coastal upwelling intensity increases globally because of raising greenhouse gas concentrations in the atmosphere and an associated increase of the land-sea pressure gradient and meridional wind stress. |
format |
Article in Journal/Newspaper |
author |
N. Narayan A. Paul S. Mulitza M. Schulz |
author_facet |
N. Narayan A. Paul S. Mulitza M. Schulz |
author_sort |
N. Narayan |
title |
Trends in coastal upwelling intensity during the late 20th century |
title_short |
Trends in coastal upwelling intensity during the late 20th century |
title_full |
Trends in coastal upwelling intensity during the late 20th century |
title_fullStr |
Trends in coastal upwelling intensity during the late 20th century |
title_full_unstemmed |
Trends in coastal upwelling intensity during the late 20th century |
title_sort |
trends in coastal upwelling intensity during the late 20th century |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/os-6-815-2010 https://doaj.org/article/64c98124eb8a4e8b81de5ace17661e38 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Ocean Science, Vol 6, Iss 3, Pp 815-823 (2010) |
op_relation |
http://www.ocean-sci.net/6/815/2010/os-6-815-2010.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 doi:10.5194/os-6-815-2010 1812-0784 1812-0792 https://doaj.org/article/64c98124eb8a4e8b81de5ace17661e38 |
op_doi |
https://doi.org/10.5194/os-6-815-2010 |
container_title |
Ocean Science |
container_volume |
6 |
container_issue |
3 |
container_start_page |
815 |
op_container_end_page |
823 |
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1766133339353251840 |