Reproduction of links between circulation types and precipitation in Central Europe in regional climate model simulations

0433815 - ÚFA 2015 DE A - Abstract
Plavcová, Eva - Kyselý, Jan - Štěpánek, Petr
Reproduction of links between circulation types and precipitation in Central Europe in regional climate model simulations.
Geophysical Research Abstracts. Vol. 16. Göttingen: EGU, 2014. EGU2014-1056. ISSN 1607-7962.
[EGU General Assembly 2014. 27.04.2014-02.05.2014, Vídeň]
Institutional support: RVO:68378289
http://meetingorganizer.copernicus.org/EGU2014/EGU2014-1056.pdf

The study evaluates relationships between large-scale atmospheric circulation (represented by circulation indices and circulation types derived from gridded mean sea level pressure) and daily precipitation amounts over three regions in the Czech Republic (Central Europe) with different precipitation regimes. We examine how ENSEMBLES regional climate model (RCM) simulations driven by re-analysis reproduce the observed links and capture differences in the links between the regions (lowlands vs. highlands) and seasons. We study the links of circulation to (i) mean precipitation over the regions, (ii) probability of wet days, and (iii) probability of extreme daily precipitation (exceeding threshold defined by a high quantile of precipitation distribution in a given season). Relatively strong links between atmospheric circulation and the precipitation characteristics are found in the observed data. The links are generally more pronounced for highland than lowland regions. More wet days and higher precipitation amounts are found for cyclonic and stronger flows, and for westerly and north-easterly flows.
Permanent Link: http://hdl.handle.net/11104/0237973