Links between circulation and changes in the characteristics of Iberian rainfall
Investigation of the links between atmospheric circulation patterns and rainfall is important for the understanding of climatic variability and for the development of empirical circulation-based downscaling methods. Here, spatial and temporal variations in circulation-rainfall relationships over the...
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:31086 2023-06-06T11:57:23+02:00 Links between circulation and changes in the characteristics of Iberian rainfall Goodess, CM Jones, PD 2002 https://ueaeprints.uea.ac.uk/id/eprint/31086/ https://doi.org/10.1002/joc.810 unknown Goodess, CM and Jones, PD (2002) Links between circulation and changes in the characteristics of Iberian rainfall. International Journal of Climatology, 22 (13). pp. 1593-1615. ISSN 0899-8418 doi:10.1002/joc.810 Article PeerReviewed 2002 ftuniveastangl https://doi.org/10.1002/joc.810 2023-04-13T22:31:33Z Investigation of the links between atmospheric circulation patterns and rainfall is important for the understanding of climatic variability and for the development of empirical circulation-based downscaling methods. Here, spatial and temporal variations in circulation-rainfall relationships over the Iberian Peninsula during the period 1958–97 are explored using an automated circulation classification scheme and daily rainfall totals for 18 stations. Links between the circulation classification scheme and the North Atlantic oscillation (NAO) are also considered, as are the direct links between rainfall and the NAO. Trends in rainfall and circulation-type frequency are explored. A general tendency towards decreasing mean seasonal rainfall over the peninsula, with the exception of the southeastern Mediterranean coast, hides larger changes in wet day amount and rainfall probability. There is a tendency towards more, less-intensive rain days across much of Iberia, with a tendency towards more, more-intensive rain days along the southeastern Mediterranean coast, both of which are reflected in changes in rainfall amount quantiles. A preliminary analysis indicates that these changes may have occurred systematically across all circulation types. Comparison of the trends in rainfall and in circulation-type frequency suggests possible links. These links are supported by linear regression analyses using circulation-type frequencies as predictor variables and rainfall totals for winter months as the predictands. The selected predictor variables reflect the main circulation features influencing winter rainfall across the peninsula, i.e. the strong influence of Atlantic westerly and southwesterly airmasses over much of the peninsula, of northerly and northwesterly surface flow over northern/northwestern Spain and northern Portugal and the stronger effect of Mediterranean rather than Atlantic influences in southeastern Spain. The observed rainfall changes cannot, however, be explained by changes in circulation alone. Article in Journal/Newspaper North Atlantic North Atlantic oscillation University of East Anglia: UEA Digital Repository International Journal of Climatology 22 13 1593 1615 |
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University of East Anglia: UEA Digital Repository |
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Investigation of the links between atmospheric circulation patterns and rainfall is important for the understanding of climatic variability and for the development of empirical circulation-based downscaling methods. Here, spatial and temporal variations in circulation-rainfall relationships over the Iberian Peninsula during the period 1958–97 are explored using an automated circulation classification scheme and daily rainfall totals for 18 stations. Links between the circulation classification scheme and the North Atlantic oscillation (NAO) are also considered, as are the direct links between rainfall and the NAO. Trends in rainfall and circulation-type frequency are explored. A general tendency towards decreasing mean seasonal rainfall over the peninsula, with the exception of the southeastern Mediterranean coast, hides larger changes in wet day amount and rainfall probability. There is a tendency towards more, less-intensive rain days across much of Iberia, with a tendency towards more, more-intensive rain days along the southeastern Mediterranean coast, both of which are reflected in changes in rainfall amount quantiles. A preliminary analysis indicates that these changes may have occurred systematically across all circulation types. Comparison of the trends in rainfall and in circulation-type frequency suggests possible links. These links are supported by linear regression analyses using circulation-type frequencies as predictor variables and rainfall totals for winter months as the predictands. The selected predictor variables reflect the main circulation features influencing winter rainfall across the peninsula, i.e. the strong influence of Atlantic westerly and southwesterly airmasses over much of the peninsula, of northerly and northwesterly surface flow over northern/northwestern Spain and northern Portugal and the stronger effect of Mediterranean rather than Atlantic influences in southeastern Spain. The observed rainfall changes cannot, however, be explained by changes in circulation alone. |
format |
Article in Journal/Newspaper |
author |
Goodess, CM Jones, PD |
spellingShingle |
Goodess, CM Jones, PD Links between circulation and changes in the characteristics of Iberian rainfall |
author_facet |
Goodess, CM Jones, PD |
author_sort |
Goodess, CM |
title |
Links between circulation and changes in the characteristics of Iberian rainfall |
title_short |
Links between circulation and changes in the characteristics of Iberian rainfall |
title_full |
Links between circulation and changes in the characteristics of Iberian rainfall |
title_fullStr |
Links between circulation and changes in the characteristics of Iberian rainfall |
title_full_unstemmed |
Links between circulation and changes in the characteristics of Iberian rainfall |
title_sort |
links between circulation and changes in the characteristics of iberian rainfall |
publishDate |
2002 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/31086/ https://doi.org/10.1002/joc.810 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
Goodess, CM and Jones, PD (2002) Links between circulation and changes in the characteristics of Iberian rainfall. International Journal of Climatology, 22 (13). pp. 1593-1615. ISSN 0899-8418 doi:10.1002/joc.810 |
op_doi |
https://doi.org/10.1002/joc.810 |
container_title |
International Journal of Climatology |
container_volume |
22 |
container_issue |
13 |
container_start_page |
1593 |
op_container_end_page |
1615 |
_version_ |
1767965521882382336 |