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| Titel |
The anomalous low and high temperatures of 2012 over Greece – an explanation from a meteorological and climatological perspective |
| VerfasserIn |
K. Tolika, P. Maheras, I. Pytharoulis, C. Anagnostopoulou |
| 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 Sciences ; 14, no. 3 ; Nr. 14, no. 3 (2014-03-04), S.501-507 |
| Datensatznummer |
250118327
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| Publikation (Nr.) |
 copernicus.org/nhess-14-501-2014.pdf |
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| Zusammenfassung |
| 2012 was the hottest year in Greece on the basis of the available record
dating back to 1958, displaying at the same time the widest annual
temperature range. During the summer and autumn months, numerous regions in
the domain of study experienced record-breaking maximum and minimum
temperatures. Conversely, the winter period was particularly cold and January
one of the coldest months over the last 55 yr. The analysis of the cold
period indicates that the synoptic conditions resemble the positive phase of
the Eastern Mediterranean Pattern (EMP). The predominance of these cool
conditions seems to be related primarily to an intense NNW or NNE atmospheric
circulation, as a consequence of the positive EMP phase. Moreover, the
reduction in the floating sea ice emerges as a key driver of the formation of
a low-pressure pattern and the reinforcement of the trough south of
Scandinavia, which in turn strengthened the Siberia High east of the trough.
This reinforcement resulted in a blocking pattern and in favorable conditions
for the EMP formation. The atmospheric circulation during the prolonged
high-temperature period resembles, respectively, the negative phase of North
Sea–Caspian Pattern teleconnection. The observed positive pole, in
conjunction with the strong southwestern circulation, results in temperature
increases and in the development of a smooth pressure field that contributes
to the weakening of the Etesian winds and therefore to calm conditions over
the continental areas. |
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