The separate roles played by the two geographical poles of the NAO in influencing winter precipitation over Spain
In this article, the spatiotemporal relationship between winter (DJF) precipitation over Spain and sea level pressure fields is studied using the Center of Action (COA) approach. The COAs which make up the North Atlantic Oscillation (NAO), i.e., the Azores High (AH) and the Icelandic Low (IL), are c...
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ftagakhanuniv:oai:ecommons.aku.edu:pakistan_fhs_mc_chs_chs-2057 2023-08-27T04:10:48+02:00 The separate roles played by the two geographical poles of the NAO in influencing winter precipitation over Spain Rehman, Saqib Ur Usmani, Bilal Ahmed Simmonds, Ian 2023-04-01T07:00:00Z https://ecommons.aku.edu/pakistan_fhs_mc_chs_chs/1058 https://www.sciencedirect.com/science/article/abs/pii/S1364682623000524 unknown eCommons@AKU https://ecommons.aku.edu/pakistan_fhs_mc_chs_chs/1058 https://www.sciencedirect.com/science/article/abs/pii/S1364682623000524 Community Health Sciences Climate changes Global warming Spatiotemporal Community-Based Research Environmental Studies Nature and Society Relations Oceanography and Atmospheric Sciences and Meteorology article 2023 ftagakhanuniv 2023-08-07T06:44:42Z In this article, the spatiotemporal relationship between winter (DJF) precipitation over Spain and sea level pressure fields is studied using the Center of Action (COA) approach. The COAs which make up the North Atlantic Oscillation (NAO), i.e., the Azores High (AH) and the Icelandic Low (IL), are considered separately, and we find that interannual variations in the strength and position of the AH explain a very high fraction of the variance of Spain winter precipitation. The correlation of AH properties with winter precipitation is strongest in the northwest of the country. A regression model was developed that explains 83 percent of the variance of the Spain precipitation over 1981-2011. We found that the positive extreme values of AH indices are related to droughts, and negative extremes to heavy rain. The westward and southward shifts of the AH encourage the presence of low pressure system over the Iberian Peninsula and high precipitation in Spain occurs due to the moisture transport off the North Atlantic impinging upon Peninsula Spain and France. Article in Journal/Newspaper North Atlantic North Atlantic oscillation The Aga Khan University: eCommons@AKU |
institution |
Open Polar |
collection |
The Aga Khan University: eCommons@AKU |
op_collection_id |
ftagakhanuniv |
language |
unknown |
topic |
Climate changes Global warming Spatiotemporal Community-Based Research Environmental Studies Nature and Society Relations Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
Climate changes Global warming Spatiotemporal Community-Based Research Environmental Studies Nature and Society Relations Oceanography and Atmospheric Sciences and Meteorology Rehman, Saqib Ur Usmani, Bilal Ahmed Simmonds, Ian The separate roles played by the two geographical poles of the NAO in influencing winter precipitation over Spain |
topic_facet |
Climate changes Global warming Spatiotemporal Community-Based Research Environmental Studies Nature and Society Relations Oceanography and Atmospheric Sciences and Meteorology |
description |
In this article, the spatiotemporal relationship between winter (DJF) precipitation over Spain and sea level pressure fields is studied using the Center of Action (COA) approach. The COAs which make up the North Atlantic Oscillation (NAO), i.e., the Azores High (AH) and the Icelandic Low (IL), are considered separately, and we find that interannual variations in the strength and position of the AH explain a very high fraction of the variance of Spain winter precipitation. The correlation of AH properties with winter precipitation is strongest in the northwest of the country. A regression model was developed that explains 83 percent of the variance of the Spain precipitation over 1981-2011. We found that the positive extreme values of AH indices are related to droughts, and negative extremes to heavy rain. The westward and southward shifts of the AH encourage the presence of low pressure system over the Iberian Peninsula and high precipitation in Spain occurs due to the moisture transport off the North Atlantic impinging upon Peninsula Spain and France. |
format |
Article in Journal/Newspaper |
author |
Rehman, Saqib Ur Usmani, Bilal Ahmed Simmonds, Ian |
author_facet |
Rehman, Saqib Ur Usmani, Bilal Ahmed Simmonds, Ian |
author_sort |
Rehman, Saqib Ur |
title |
The separate roles played by the two geographical poles of the NAO in influencing winter precipitation over Spain |
title_short |
The separate roles played by the two geographical poles of the NAO in influencing winter precipitation over Spain |
title_full |
The separate roles played by the two geographical poles of the NAO in influencing winter precipitation over Spain |
title_fullStr |
The separate roles played by the two geographical poles of the NAO in influencing winter precipitation over Spain |
title_full_unstemmed |
The separate roles played by the two geographical poles of the NAO in influencing winter precipitation over Spain |
title_sort |
separate roles played by the two geographical poles of the nao in influencing winter precipitation over spain |
publisher |
eCommons@AKU |
publishDate |
2023 |
url |
https://ecommons.aku.edu/pakistan_fhs_mc_chs_chs/1058 https://www.sciencedirect.com/science/article/abs/pii/S1364682623000524 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Community Health Sciences |
op_relation |
https://ecommons.aku.edu/pakistan_fhs_mc_chs_chs/1058 https://www.sciencedirect.com/science/article/abs/pii/S1364682623000524 |
_version_ |
1775353108070662144 |