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Zmena klímy – možný dopad (nielen) na obyvateľstvo - Prohuman

Zmena klímy – možný dopad (nielen) na obyvateľstvo - Prohuman

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interdiur<strong>na</strong>l deviations. On the other hand the long series of heat waves in summer<br />

and mild weather in winter can burden both people and ecosystems. Prolongation<br />

of growing season to the beginning of February results in higher risk of early spring<br />

frost damages in agriculture and gardens in the Central European regions.<br />

Figure 5. Time series of the<br />

annual air temperature means<br />

T in 1950–2100 modified for the<br />

station Hurbanovo from 2 GCMs<br />

and 2 RCMs and the measured<br />

annual means at Hurbanovo<br />

(115 m a.s.l., SW Slovakia) in<br />

1950–2010 (solid line).<br />

PRECIPITATION AND SNOW COVER TRENDS AND VARIATIONS<br />

Precipitation totals and occurrence are another very important climatic variables<br />

in climate change issues. On the other hand, humidity and evapotranspiration<br />

depend significantly mainly on precipitation regime. Comparing the distinct<br />

air temperature increase in case of enhanced greenhouse effect the changes in<br />

precipitation characteristics are more complicated. Basically, the annual totals<br />

have mostly insignificant trends in the period 1881–2012 (slightly decreasing in<br />

the southeastern half of the Central Europe and slightly increasing in the remaining<br />

part), but the annual regime of daily precipitation has changed remarkably.<br />

Longer spells of low precipitation totals and shorter heavy precipitation events<br />

are typical in the last 20-year period also in Slovakia. This regime together with<br />

pretty higher temperature during low precipitation spells results in longer and<br />

more severe drought events in the growing seasons not only in southern Slovakia<br />

and other lowlands but also in the mountains. Example of such development<br />

can be seen in Figs. 6 and 7 in case of the Hurbanovo precipitation series. In<br />

spite of increase in summer precipitation totals by about 10% in 1901–2012 serious<br />

drought events occurred here mainly since 1990 (summer precipitation totals<br />

consist predomi<strong>na</strong>ntly from convective showers and thunderstorm downpours<br />

in the last two decades). The sce<strong>na</strong>rios of possible future summer precipitation<br />

totals can be seen in Figs. 8 and 9 (modified by 2 models and 4 different meth-<br />

94

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