Soil moisture trends in the Czech Republic between 1961 and 2012

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Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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TRNKA Miroslav BRÁZDIL Rudolf MOŽNÝ M. ŠTĚPÁNEK Petr DOBROVOLNÝ Petr ZAHRADNÍČEK Pavel BALEK J. SEMERÁDOVÁ D. DUBROVSKÝ M. HLAVINKA P. EITZINGER Josef WARDLOW B. SVOBODA M. HAYES M. ŽALUD Zdeněk

Rok publikování 2015
Druh Článek v odborném periodiku
Časopis / Zdroj International Journal of Climatology
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Doi http://dx.doi.org/10.1002/joc.4242
Obor Vědy o atmosféře, meteorologie
Klíčová slova soil moisture; drought assessment; drought climatology; water balance; climate dice; observed climate change; Czech Republic
Popis Central Europe is generally not considered a drought-prone region compared with, for example, the Mediterranean. However, Central Europe, including the Czech Republic, recently experienced a series of drought events with substantial impacts, especially on crop production. Because agriculture systems, and vegetation in general, have adapted to evenly distributed precipitation, the region is susceptible to even short-term droughts. The recent drought events may be the result of multi-decadal climate variability or a more general trend, with some studies showing a link to a more frequent occurrence of atmospheric circulation patterns that are conducive to drought. This study introduces an innovation to the standard methodological approaches in evaluating drought climatology by analysing soil moisture conditions over more than 50 years. This approach relies on state-of-the-art observed weather data and state-of-the-art soil moisture model data, and focuses on the dynamic simulation of soil moisture content with high temporal (daily) and spatial (500 m) resolution in a diverse landscape. Statistically significant trends of decreasing soil moisture content were found, notably during May and June between 1961 and 2012. In contrast, trends towards higher soil moisture content were noted during the October-March time period. When the periods of 2001-2012 and 1961-1980 were compared, the probability of drought between April and June was found to increase by 50%. This indicates a loading of the climate dice' towards drier conditions. The probability of extreme drought events has also been found to increase. These results support concerns about the potentially increased severity of drought events in Central Europe under projected climate change.
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