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| Titel |
Wind patterns associated with the development of daytime thunderstorms over Istria |
| VerfasserIn |
G. Poljak, M. T. Prtenjak, M. Kvakić, N. Strelec Mahovic, K. Babić |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 32, no. 4 ; Nr. 32, no. 4 (2014-04-14), S.401-420 |
| Datensatznummer |
250121049
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| Publikation (Nr.) |
 copernicus.org/angeo-32-401-2014.pdf |
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| Zusammenfassung |
The northeastern (NE) Adriatic in the northern Mediterranean is the area with
(i) the highest frequency of thunderstorms in Croatia, and (ii) frequent
appearances of sea breeze (SB) along the coast. This study investigates the
impact of the combined large-scale wind (associated with particular synoptic
conditions) and the SB on the moist convection development over the NE
Adriatic. The four selected cases were (i) chosen on the basis of a daytime
moist convection; (ii) supplemented by one of the dominant large-scale winds
with seaward (NE, NW) and landward (SW, SE) directions and (iii) simulated by
WRF numerical model.
The near-surface wind patterns consisted of SBs along the coastline,
generated a narrow eastward-moving convergence zone (CZ) along the area if
the large-scale wind was less than 9 m s−1 (below 500 hPa). Apart
from the low-level CZ, the advection of large-scale wind influenced the
lifetime and movement of the initial Cb cells. While the local front
collision with the NE wind advection caused the thunderstorm to propagate
southward, the CZ and fronts interaction determined the afternoon
northwestward storm movement against the NW large-scale wind. Due to
particular synoptic background, the thunderstorm event in SE case was the
shortest with only a minor impact on the SB. While the origins and locations
of storm cells were completely controlled by the low-level CZ and the upward
advection of low-level moisture at the SB front, the most typical convective
case with SW warm-wet wind only partially supported the SB–Cb interaction. |
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