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| Titel |
Numerical simulation of the impact of Anatolian and Caucasus Mountains on the precipitation distribution over the Black Sea |
| VerfasserIn |
P. Ghafarian, M. Azadi, A. H. Meshkatee, M. M. Farahani |
| 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. 3 ; Nr. 12, no. 3 (2012-03-13), S.607-613 |
| Datensatznummer |
250010605
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| Publikation (Nr.) |
 copernicus.org/nhess-12-607-2012.pdf |
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| Zusammenfassung |
| An attempt is made to examine the role of Anatolian and
Caucasus mountain ranges in the precipitation distribution over the Black
Sea region and to clarify the dynamical and physical mechanisms responsible
for precipitation distribution over the region. Existence of a complex
topography in the southern and eastern part of the Black Sea region makes it
an important region for cyclogenesis. In this study the effect of Anatolian and
Caucasus Mountains on the precipitating synoptic systems forming over the
Black Sea are investigated. To this end, the Weather Research and
Forecasting (WRF) model at 15-km horizontal grid spacing has been used to
evaluate the lifetime of a low pressure system that was accompanied with
heavy precipitation on 14 March 2009 over the coastal region of the
Black Sea. Two experiments were conducted. In the control experiment (CTL),
the topographical features of the region were retained. In the sensitivity
experiment (EXP), the Anatolian and Caucasus mountain ranges were removed. It
is found that in the EXP, some fields including vertical motion, relative
vorticity, humidity, geopotential height in low level, cloud water content
and precipitation distribution in the region undergo significant changes. As
such, in the EXP, the vorticity, and the cut-off low system over the Black
Sea intensified. It is also seen that, under favorable conditions for
precipitation occurrence, the precipitation intensity in the south and east
coasts of the Black Sea decreased and the region of maximum precipitation
shifted toward the "Sea of Azov" region, in the direction of the
surface southerly winds. |
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