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| Titel |
Winter precipitation over the Iberian peninsula and its relationship to circulation indices |
| VerfasserIn |
C. Rodríguez-Puebla, A. H. Encinas, J. Saénz |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 5, no. 2 ; Nr. 5, no. 2, S.233-244 |
| Datensatznummer |
250002411
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| Publikation (Nr.) |
 copernicus.org/hess-5-233-2001.pdf |
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| Zusammenfassung |
| 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 |
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