Precipitation Trends over Slovakia in the Period 1981–2013

Zeleňáková, Martina; Vido, Jaroslav; Portela, María Manuela; Purcz, Pavol; Blištán, Peter; Hlavatá, Helena; Hluštı́k, Petr

doi:10.3390/w9120922

Cited by 52 publications

(45 citation statements)

References 83 publications

(88 reference statements)

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“…Hydroloclimatic time series in Slovakia, mainly precipitation, have been investigated in various studies [12,[65][66][67][68][69][70][71][72][73][74][75][76][77]. Lapin et al [73] analysed seasonal changes in monthly precipitation for future time horizons on the basis of downscaled outputs from General Circulation Model (GCM) scenarios.…”

Section: Discussionmentioning

confidence: 99%

“…Although the generally driest month is August, the highest decreasing trend in temperature was found in January ( Figure 6). During the warm period (from May to October) convection precipitation [12] seems to play the main role. Our opinion is based on the spatial distribution of the highest precipitation amounts falling mainly in the mountainous and highland areas of Slovakia.…”

Section: Discussionmentioning

confidence: 99%

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Trends in Precipitation and Temperatures in Eastern Slovakia (1962–2014)

Zeleňáková

Purcz

Blištán

et al. 2018

Water

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Abstract:In this paper, the results of trend analysis applied to precipitation and temperature monthly data for the period from 1962 to 2014 is presented for the hydrological year (from November to October) in sixteen climatic stations in Eastern Slovakia. The topography of this part of the country is very diverse and it affects the climate. The Mann-Kendall non-parametric test coupled with Sen's slope was applied to identify the significant long-term climatic trends, as well as the magnitude of those trends. According to the present study, all climatic stations in Eastern Slovakia show a positive trend in temperature during the year and almost all of them show a significant positive annual trend in temperature. Seasonal and monthly trend analyses produced the same results. Trends in temperature are always positive during winter and spring. Trends in precipitation are also mostly positive during winter and spring, although some negative trends were also found during these seasons. The spatial distribution of precipitation and temperature trends was modelled in ArcGIS using geostatistical analysis. Abrupt positive trend shifts in annual precipitation and temperature time series were also investigated. An abrupt shift in precipitation at the highest climatic station, Lomnický peak, began around 1985 (+). Abrupt shifts in temperature began around 1970 (+) at the presented climatic stations. The extremity of the climate is confirmed by an analysis of the trends in wet and dry spells. Trends showed increasing tendencies in medium-and long-term wet spells.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Trends in Precipitation and Temperatures in Eastern Slovakia (1962–2014)

Zeleňáková

Purcz

Blištán

et al. 2018

Water

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“…In general, the rainfall increases with altitude. The rainiest month is usually June or July, and the least rainfall occurs from January to March [24,25]. The highest daily rainfall was 231.9 mm, which was measured in 1957.…”

Section: Study Area and Datamentioning

confidence: 97%

Dynamic Analysis of Meteorological Parameters in Košice Climatic Station in Slovakia

Zeleňáková

Jothiprakash

Arjun

et al. 2018

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Evaporation and precipitation are often considered the most important processes in the water cycle. Recent studies have turned to chaotic analysis and short-term prediction for analyzing and forecasting the time series of such phenomena. However, even with chaos theory, the accurate forecasting of pan evaporation is not a straightforward business, as it involves a number of variables whose changes directly and/or indirectly affect the scale and amount of pan evaporation. In this study, the use of the false nearest neighbour method for the chaotic analysis of pan evaporation and related metrological parameters is discussed. A literature review is presented on chaos theory and its applications in modelling physical systems. Also, a review of the literature on multivariate analysis and the presence of chaos in meteorology are presented. A detailed procedure for finding the presence of chaos in a time series using false nearest neighbour (FNN) is discussed. The possible lag time to be considered in the FNN analysis is estimated using the autocorrelation function (ACF) and average mutual information (AMI) apart from the time-step of the measurement. Thus, FNN is studied with three different lag times of the time series. Six meteorological parameters: average temperature, relative humidity, wind speed, sunshine hours, dew point temperature, and pan evaporation are measured at the observation station Kosice in Slovakia for a period of 20 years. Thus, the available time series are analysed using ACF, AMI, and FNN methods, and the results obtained are analysed in the study. Nonlinear behaviour is seen in all of the observed parameters. Pan evaporation, average temperature, and dew point temperature are found to exhibit clear chaotic behaviour, while relative humidity, sunshine hours, and wind speed show stochastic behaviour.

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“…Decreasing trends in precipitation in the period 1981-2013 were detected in December in the northern part of Slovakia, while the central and southern parts revealed increasing trends. Most of the stations showed increasing summer precipitation trends, especially in July [18]. Forecasts by 2100 refer to the drying of southern regions, the growth of liquid precipitation, and the decrease in the number of days with an average freezing point at higher altitudes (800-1000 m a. s. l. [19].…”

Section: Introductionmentioning

confidence: 99%

The Dynamics of the Phenological Development of Four Woody Species in South-West and Central Slovakia

et al. 2018

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Phenological observations record the dynamics of vegetation in relation to meteorological conditions as well as the long-term trends in relation to climate change. We processed 20-year data of the flowering (BBCH scale 60), leaves unfolding (BBCH 11) and ripening of fruits (BBCH 86) of four woody species in south-west and central Slovakia. The phenological year begins with the flowering of the hazel. This phenophase has the largest amplitude of onset (52-65 days) as well as interannual variability (s x = 20.2-33.4%) as it enters an unstable condition in early spring. At all stations, the order of phenophases is the same from the end of April. We found the highest vertical phenology gradient of the BBCH 60 Tilia cordata Mill. (6 days/100 m) and the smallest of BBCH 11 T. cordata (2.4 days/100). The statistically significant trends (p < 0.05) in shifting to the earlier period were in BBCH 60 Crataegus oxyacantha L. (0.4-0.5 days per year), BBCH 86 Corylus avellana L. (0.6 days per year), BBCH 60 Prunus spinosa L. (0.5-0,6 days per year) and BBCH 11 Prunus spinosa L. (0.6-0.7 days per year). These shifts indicate the change in the onset of the phenophases in south-west and central Slovakia.

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Precipitation Trends over Slovakia in the Period 1981–2013

Cited by 52 publications

References 83 publications

Trends in Precipitation and Temperatures in Eastern Slovakia (1962–2014)

Trends in Precipitation and Temperatures in Eastern Slovakia (1962–2014)

Dynamic Analysis of Meteorological Parameters in Košice Climatic Station in Slovakia

The Dynamics of the Phenological Development of Four Woody Species in South-West and Central Slovakia

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