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Advances in Meteorology
Volume 2015, Article ID 715830, 12 pages
http://dx.doi.org/10.1155/2015/715830
Research Article

Precipitation Regime and Temporal Changes in the Central Danubian Lowland Region

1Institute of Hydrology, Slovak Academy of Sciences, Racianska 75, 83102 Bratislava, Slovakia
2Faculty of Civil Engineering, Slovak University of Technology in Bratislava, Radlinskeho 11, 81368 Bratislava, Slovakia
3Department of Applied Mathematics and Statistics, Faculty of Mathematics, Physics and Informatics, Comenius University, 84248 Bratislava, Slovakia

Received 11 April 2014; Revised 13 July 2014; Accepted 28 August 2014

Academic Editor: Francisco J. Tapiador

Copyright © 2015 Dana Halmova et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim of this paper is to investigate the statistical aspects of multiannual variability of precipitation at the Hurbanovo station, Slovakia, over 140 years (1872–2011). We compare the long-term variability of annual precipitation for Hurbanovo (Slovakia), Brno (Czech Republic), Vienna (Austria), and Mosonmagyarovar (Hungary) stations using autocorrelation and spectral analysis methods. From the long-term point of view, there is no consistent trend in the annual precipitation; only a multiannual variability has been detected. Consequently we identify changes in the distribution of annual maximum daily precipitation for Hurbanovo during different periods for winter-spring and summer-autumn seasons using histograms, empirical exceedance curves, and frequency curves of daily precipitation. Next, we calculate the periods of days without precipitation exceeding 29 days between 1872 and 2011. The longest period of days without precipitation was 83 days in 1947. The statistical analysis does not confirm our initial hypothesis that neither high daily precipitation (over 51.2 mm per day) nor long dry periods (more than 50 days without precipitation) would occur more frequently nowadays. We assume that the decrease in annual precipitation over the period 1942–2011 (compared to 1872–1941) is caused by the less frequent occurrence of daily precipitation between 0.4 and 25.6 mm.