Winter precipitation over the Iberian peninsula and its relationship to circulation indices
Winter precipitation variability over the Iberian peninsula was investigated by obtaining the spatial and temporal patterns. Empirical Orthogonal Functions were used to describe the variance distribution and to compress the precipitation data into a few modes. The corresponding spatial patterns divi...
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ftcopernicus:oai:publications.copernicus.org:hess39473 2023-05-15T17:29:30+02:00 Winter precipitation over the Iberian peninsula and its relationship to circulation indices Rodríguez-Puebla, C. Encinas, A. H. Sáenz, J. 2018-09-27 application/pdf https://doi.org/10.5194/hess-5-233-2001 https://www.hydrol-earth-syst-sci.net/5/233/2001/ eng eng doi:10.5194/hess-5-233-2001 https://www.hydrol-earth-syst-sci.net/5/233/2001/ eISSN: 1607-7938 Text 2018 ftcopernicus https://doi.org/10.5194/hess-5-233-2001 2019-12-24T09:59:47Z Winter precipitation variability over the Iberian peninsula was investigated by obtaining the spatial and temporal patterns. Empirical Orthogonal Functions were used to describe the variance distribution and to compress the precipitation data into a few modes. The corresponding spatial patterns divide the peninsula into climatic regions according to precipitation variations. The associated time series were related to large scale circulation indices and tropical sea surface temperature anomalies by using lag cross-correlation and cross-spectrum. The major findings are: the most influential indices for winter precipitation were the North Atlantic Oscillation and the East Atlantic/West Russian pattern; coherent oscillations were detected at about eight years between precipitation and the North Atlantic Oscillation and some dynamic consequences of the circulation on precipitation over the Iberian peninsula were examined during drought and wet spells. In the end statistical methods have been proposed to downscale seasonal precipitation prediction. Keywords: Winter precipitation, circulation indices, Iberian peninsula climate, climate variations, precipitation trend Text North Atlantic North Atlantic oscillation Copernicus Publications: E-Journals Hydrology and Earth System Sciences 5 2 233 244 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
Winter precipitation variability over the Iberian peninsula was investigated by obtaining the spatial and temporal patterns. Empirical Orthogonal Functions were used to describe the variance distribution and to compress the precipitation data into a few modes. The corresponding spatial patterns divide the peninsula into climatic regions according to precipitation variations. The associated time series were related to large scale circulation indices and tropical sea surface temperature anomalies by using lag cross-correlation and cross-spectrum. The major findings are: the most influential indices for winter precipitation were the North Atlantic Oscillation and the East Atlantic/West Russian pattern; coherent oscillations were detected at about eight years between precipitation and the North Atlantic Oscillation and some dynamic consequences of the circulation on precipitation over the Iberian peninsula were examined during drought and wet spells. In the end statistical methods have been proposed to downscale seasonal precipitation prediction. Keywords: Winter precipitation, circulation indices, Iberian peninsula climate, climate variations, precipitation trend |
format |
Text |
author |
Rodríguez-Puebla, C. Encinas, A. H. Sáenz, J. |
spellingShingle |
Rodríguez-Puebla, C. Encinas, A. H. Sáenz, J. Winter precipitation over the Iberian peninsula and its relationship to circulation indices |
author_facet |
Rodríguez-Puebla, C. Encinas, A. H. Sáenz, J. |
author_sort |
Rodríguez-Puebla, C. |
title |
Winter precipitation over the Iberian peninsula and its relationship to circulation indices |
title_short |
Winter precipitation over the Iberian peninsula and its relationship to circulation indices |
title_full |
Winter precipitation over the Iberian peninsula and its relationship to circulation indices |
title_fullStr |
Winter precipitation over the Iberian peninsula and its relationship to circulation indices |
title_full_unstemmed |
Winter precipitation over the Iberian peninsula and its relationship to circulation indices |
title_sort |
winter precipitation over the iberian peninsula and its relationship to circulation indices |
publishDate |
2018 |
url |
https://doi.org/10.5194/hess-5-233-2001 https://www.hydrol-earth-syst-sci.net/5/233/2001/ |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
eISSN: 1607-7938 |
op_relation |
doi:10.5194/hess-5-233-2001 https://www.hydrol-earth-syst-sci.net/5/233/2001/ |
op_doi |
https://doi.org/10.5194/hess-5-233-2001 |
container_title |
Hydrology and Earth System Sciences |
container_volume |
5 |
container_issue |
2 |
container_start_page |
233 |
op_container_end_page |
244 |
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1766123647010865152 |