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| Titel |
Temperature extremes in Europe: overview of their driving atmospheric patterns |
| VerfasserIn |
C. Andrade, S. M. Leite, J. A. Santos |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 5 ; Nr. 12, no. 5 (2012-05-24), S.1671-1691 |
| Datensatznummer |
250010829
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| Publikation (Nr.) |
 copernicus.org/nhess-12-1671-2012.pdf |
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| Zusammenfassung |
| As temperature extremes have a deep impact on environment, hydrology,
agriculture, society and economy, the analysis of the mechanisms underlying
their occurrence, including their relationships with the large-scale
atmospheric circulation, is particularly pertinent and is discussed here for
Europe and in the period 1961–2010 (50 yr). For this aim, a canonical
correlation analysis, coupled with a principal component analysis (BPCCA),
is applied between the monthly mean sea level pressure fields, defined
within a large Euro-Atlantic sector, and the monthly occurrences of two
temperature extreme indices (TN10p – cold nights and TX90p – warm days) in
Europe. Each co-variability mode represents a large-scale forcing on the
occurrence of temperature extremes. North Atlantic Oscillation-like patterns
and strong anomalies in the atmospheric flow westwards of the British Isles
are leading couplings between large-scale atmospheric circulation and
winter, spring and autumn occurrences of both cold nights and warm days in
Europe. Although summer couplings depict lower coherence between warm and
cold events, important atmospheric anomalies are key driving mechanisms. For
a better characterization of the extremes, the main features of the
statistical distributions of the absolute minima (TNN) and maxima (TXX) are
also examined for each season. Furthermore, statistically significant
downward (upward) trends are detected in the cold night (warm day)
occurrences over the period 1961–2010 throughout Europe, particularly in
summer, which is in clear agreement with the overall warming. |
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