Seasonal modulation of the El Niño–southern oscillation relationship with sea level pressure anomalies over the North Atlantic in October–March 1873–1996
Abstract The seasonal modulation of the relationship between the sea‐level pressure anomalies (SLPAs) over the North Atlantic region (100°W–50°E; 20–70°N) and the sea surface temperature anomalies (SSTAs) in the tropical Pacific (120–290°E; 20°N–20°S) is investigated in the northern winter (October...
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crwiley:10.1002/joc.868 2024-09-15T18:10:02+00:00 Seasonal modulation of the El Niño–southern oscillation relationship with sea level pressure anomalies over the North Atlantic in October–March 1873–1996 Moron, V. Gouirand, I. 2003 http://dx.doi.org/10.1002/joc.868 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.868 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.868 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 23, issue 2, page 143-155 ISSN 0899-8418 1097-0088 journal-article 2003 crwiley https://doi.org/10.1002/joc.868 2024-08-09T04:28:40Z Abstract The seasonal modulation of the relationship between the sea‐level pressure anomalies (SLPAs) over the North Atlantic region (100°W–50°E; 20–70°N) and the sea surface temperature anomalies (SSTAs) in the tropical Pacific (120–290°E; 20°N–20°S) is investigated in the northern winter (October to March) from 1873 to 1996, using singular‐value decomposition and composite analyses. Both methods show that the pattern of the North Atlantic SLPA associated with the tropical Pacific SSTA in November–December is different from that found in January–March. The surface covered by a significant SLPA is larger in November–December and February–March than in January. In November–December, the warm El Niño–southern oscillation (ENSO) events are associated with negative SLPAs extending from the Hudson Bay to Scandinavia and positive SLPAs over the Azores high. The cold ENSO events are associated with a positive SLPA between Greenland and western Europe. In January, and mainly in February–March, the warm ENSO events are associated with a positive SLPA north of 50°N and a negative SLPA extending from the southeastern USA toward western and central Europe. The cold ENSO events exhibit almost reversed SLPA patterns. The change between November–December and January–March is also observed at the hemispheric scale. In November–December, the SLPAs associated with the warm minus cold ENSO composite form a hemispheric north–south dipole pattern with positive (negative) anomalies south (north) of 40–45°N. In January–March, the SLPA pattern associated with the warm minus cold ENSO composite is close to the tropical Northern‐Hemisphere pattern. Copyright © 2003 Royal Meteorological Society. Article in Journal/Newspaper Greenland Hudson Bay North Atlantic Wiley Online Library International Journal of Climatology 23 2 143 155 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The seasonal modulation of the relationship between the sea‐level pressure anomalies (SLPAs) over the North Atlantic region (100°W–50°E; 20–70°N) and the sea surface temperature anomalies (SSTAs) in the tropical Pacific (120–290°E; 20°N–20°S) is investigated in the northern winter (October to March) from 1873 to 1996, using singular‐value decomposition and composite analyses. Both methods show that the pattern of the North Atlantic SLPA associated with the tropical Pacific SSTA in November–December is different from that found in January–March. The surface covered by a significant SLPA is larger in November–December and February–March than in January. In November–December, the warm El Niño–southern oscillation (ENSO) events are associated with negative SLPAs extending from the Hudson Bay to Scandinavia and positive SLPAs over the Azores high. The cold ENSO events are associated with a positive SLPA between Greenland and western Europe. In January, and mainly in February–March, the warm ENSO events are associated with a positive SLPA north of 50°N and a negative SLPA extending from the southeastern USA toward western and central Europe. The cold ENSO events exhibit almost reversed SLPA patterns. The change between November–December and January–March is also observed at the hemispheric scale. In November–December, the SLPAs associated with the warm minus cold ENSO composite form a hemispheric north–south dipole pattern with positive (negative) anomalies south (north) of 40–45°N. In January–March, the SLPA pattern associated with the warm minus cold ENSO composite is close to the tropical Northern‐Hemisphere pattern. Copyright © 2003 Royal Meteorological Society. |
format |
Article in Journal/Newspaper |
author |
Moron, V. Gouirand, I. |
spellingShingle |
Moron, V. Gouirand, I. Seasonal modulation of the El Niño–southern oscillation relationship with sea level pressure anomalies over the North Atlantic in October–March 1873–1996 |
author_facet |
Moron, V. Gouirand, I. |
author_sort |
Moron, V. |
title |
Seasonal modulation of the El Niño–southern oscillation relationship with sea level pressure anomalies over the North Atlantic in October–March 1873–1996 |
title_short |
Seasonal modulation of the El Niño–southern oscillation relationship with sea level pressure anomalies over the North Atlantic in October–March 1873–1996 |
title_full |
Seasonal modulation of the El Niño–southern oscillation relationship with sea level pressure anomalies over the North Atlantic in October–March 1873–1996 |
title_fullStr |
Seasonal modulation of the El Niño–southern oscillation relationship with sea level pressure anomalies over the North Atlantic in October–March 1873–1996 |
title_full_unstemmed |
Seasonal modulation of the El Niño–southern oscillation relationship with sea level pressure anomalies over the North Atlantic in October–March 1873–1996 |
title_sort |
seasonal modulation of the el niño–southern oscillation relationship with sea level pressure anomalies over the north atlantic in october–march 1873–1996 |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1002/joc.868 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.868 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.868 |
genre |
Greenland Hudson Bay North Atlantic |
genre_facet |
Greenland Hudson Bay North Atlantic |
op_source |
International Journal of Climatology volume 23, issue 2, page 143-155 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.868 |
container_title |
International Journal of Climatology |
container_volume |
23 |
container_issue |
2 |
container_start_page |
143 |
op_container_end_page |
155 |
_version_ |
1810447642508918784 |