The influence of atmospheric circulation at different spatial scales on winter drought variability through a semi-arid climatic gradient in Northeast Spain
27 páginas, 15 figuras, 6 tablas.-- El documento se encuentra en su versión post-print. This paper analyses the spatial and temporal variability of winter droughts in a semi-arid geographic gradient in Northeast Spain, from the Pyrenees in the north to the Mediterranean coastland in the south. Droug...
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ftcsic:oai:digital.csic.es:10261/35524 2024-02-11T10:06:15+01:00 The influence of atmospheric circulation at different spatial scales on winter drought variability through a semi-arid climatic gradient in Northeast Spain Vicente Serrano, Sergio M. López-Moreno, Juan I. 2006-09 http://hdl.handle.net/10261/35524 https://doi.org/10.1002/joc.1387 en eng Wiley-Blackwell Royal Meteorological Society (Great Britain) http://dx.doi.org/10.1002/joc.1387 International Journal of Climatology 26(11): 1427-1453 (2006) 0899-8418 http://hdl.handle.net/10261/35524 doi:10.1002/joc.1387 open Synoptic climatology Weather types North Atlantic Oscillation Drought Standardised Precipitation Index Winter season Ebro Valley Spain artículo http://purl.org/coar/resource_type/c_6501 2006 ftcsic https://doi.org/10.1002/joc.1387 2024-01-16T09:31:41Z 27 páginas, 15 figuras, 6 tablas.-- El documento se encuentra en su versión post-print. This paper analyses the spatial and temporal variability of winter droughts in a semi-arid geographic gradient in Northeast Spain, from the Pyrenees in the north to the Mediterranean coastland in the south. Droughts that occurred between 1952 and 1999 were analysed by means of the Standardised Precipitation Index (SPI). The influence of the weather-type frequency and of the general North Atlantic atmospheric circulation patterns was analysed. The results indicate that winter droughts show an important spatial variability in the study area, differentiating three well-defined patterns. These correspond to the Pyrenees, the centre of the Ebro Valley, and the Mediterranean coastland. General negative trends in winter SPI have been found, which are indicative of the increase in winter drought conditions in the study area. Nevertheless, important spatial differences have also been recorded. Dominant north–south gradients in the influence of weather types are shown. Moreover, the negative trends in winter-SPI values agree with the negative trend in the frequency of the weather types prone to cause precipitation, such as the C, SW and W weather types and the increase in the frequency of A weather types. Nevertheless, in the Mediterranean coastland, the positive trend in SPI values agrees with the increase in the frequency of weather types of the east (E, SE), which are prone to cause precipitation in this area. Interannual variations in the frequency of the different weather types have been highly determined by different general atmospheric circulation patterns, mainly the North Atlantic Oscillation (NAO). Nevertheless, the correlation between the time series of weather-type frequency and the winter SPI is higher than that found between the SPI and the NAO. Thus, although the interannual NAO variability explains a high percentage of the interannual differences in the frequency of different weather types, it is not sufficient to ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Digital.CSIC (Spanish National Research Council) International Journal of Climatology 26 11 1427 1453 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Synoptic climatology Weather types North Atlantic Oscillation Drought Standardised Precipitation Index Winter season Ebro Valley Spain |
spellingShingle |
Synoptic climatology Weather types North Atlantic Oscillation Drought Standardised Precipitation Index Winter season Ebro Valley Spain Vicente Serrano, Sergio M. López-Moreno, Juan I. The influence of atmospheric circulation at different spatial scales on winter drought variability through a semi-arid climatic gradient in Northeast Spain |
topic_facet |
Synoptic climatology Weather types North Atlantic Oscillation Drought Standardised Precipitation Index Winter season Ebro Valley Spain |
description |
27 páginas, 15 figuras, 6 tablas.-- El documento se encuentra en su versión post-print. This paper analyses the spatial and temporal variability of winter droughts in a semi-arid geographic gradient in Northeast Spain, from the Pyrenees in the north to the Mediterranean coastland in the south. Droughts that occurred between 1952 and 1999 were analysed by means of the Standardised Precipitation Index (SPI). The influence of the weather-type frequency and of the general North Atlantic atmospheric circulation patterns was analysed. The results indicate that winter droughts show an important spatial variability in the study area, differentiating three well-defined patterns. These correspond to the Pyrenees, the centre of the Ebro Valley, and the Mediterranean coastland. General negative trends in winter SPI have been found, which are indicative of the increase in winter drought conditions in the study area. Nevertheless, important spatial differences have also been recorded. Dominant north–south gradients in the influence of weather types are shown. Moreover, the negative trends in winter-SPI values agree with the negative trend in the frequency of the weather types prone to cause precipitation, such as the C, SW and W weather types and the increase in the frequency of A weather types. Nevertheless, in the Mediterranean coastland, the positive trend in SPI values agrees with the increase in the frequency of weather types of the east (E, SE), which are prone to cause precipitation in this area. Interannual variations in the frequency of the different weather types have been highly determined by different general atmospheric circulation patterns, mainly the North Atlantic Oscillation (NAO). Nevertheless, the correlation between the time series of weather-type frequency and the winter SPI is higher than that found between the SPI and the NAO. Thus, although the interannual NAO variability explains a high percentage of the interannual differences in the frequency of different weather types, it is not sufficient to ... |
format |
Article in Journal/Newspaper |
author |
Vicente Serrano, Sergio M. López-Moreno, Juan I. |
author_facet |
Vicente Serrano, Sergio M. López-Moreno, Juan I. |
author_sort |
Vicente Serrano, Sergio M. |
title |
The influence of atmospheric circulation at different spatial scales on winter drought variability through a semi-arid climatic gradient in Northeast Spain |
title_short |
The influence of atmospheric circulation at different spatial scales on winter drought variability through a semi-arid climatic gradient in Northeast Spain |
title_full |
The influence of atmospheric circulation at different spatial scales on winter drought variability through a semi-arid climatic gradient in Northeast Spain |
title_fullStr |
The influence of atmospheric circulation at different spatial scales on winter drought variability through a semi-arid climatic gradient in Northeast Spain |
title_full_unstemmed |
The influence of atmospheric circulation at different spatial scales on winter drought variability through a semi-arid climatic gradient in Northeast Spain |
title_sort |
influence of atmospheric circulation at different spatial scales on winter drought variability through a semi-arid climatic gradient in northeast spain |
publisher |
Wiley-Blackwell |
publishDate |
2006 |
url |
http://hdl.handle.net/10261/35524 https://doi.org/10.1002/joc.1387 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://dx.doi.org/10.1002/joc.1387 International Journal of Climatology 26(11): 1427-1453 (2006) 0899-8418 http://hdl.handle.net/10261/35524 doi:10.1002/joc.1387 |
op_rights |
open |
op_doi |
https://doi.org/10.1002/joc.1387 |
container_title |
International Journal of Climatology |
container_volume |
26 |
container_issue |
11 |
container_start_page |
1427 |
op_container_end_page |
1453 |
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1790603848412299264 |