ANALYSIS OF ANNUAL AND SEASONAL AIR TEMPERATURE TRENDS IN CENTRAL PART OF ROMANIA

Viorel Arghius,Corina Arghius,Vlad Macicasan,Nicolae Baciu,Liviu-Octavian Muntean

doi:10.15551/pesd2020141004

Viorel Arghius, Corina Arghius + Show 3 more

Open Access

https://doi.org/10.15551/pesd2020141004

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Abstract

In the present study, the research was focused on analyzing long-term trends and variability of annual and seasonal air mean temperatures and some parameters related to cold and hot extreme temperatures, based on relevant continuous temperature data (1961-2018 period) provided by three regional weather stations (Cluj-Napoca, Deva and Miercurea-Ciuc). The Mann-Kendall test was used in order to find statistically-significant trends, while the magnitude of trends was estimated using Sen’s slope estimator method. The main results showed a significant increase of mean air temperature, especially in the summer season and for indicators related to hot extreme temperatures. Generally, our findings are consistent with the current global warming and previous study results on temperature variability in Romania. Anyway by comparing our results with those from the other similar studies performed in Romania, it could be observed that the climate became warmer in the study area, so the trend in annual mean and seasonal air temperature has intensified and statistical significance of the results has significantly increased. Also, the intensification of the ,,urban heat island’’ effect could be highlighted in the larger cities, like Cluj-Napoca. This increasing trend entails significant impacts on society, economy and natural ecosystems, which is expected to intensify in the near future.

Highlights

A lot of atmospheric processes, phenomena and natural hazards are closely linked to variability and trends of temperature
On January, 1961, the weather stations network in Romania was greatly reorganized and there were only few data missing from that point on, while the routine observation practices and timetable of the stations considered for this study have not Analysis of annual and seasonal air temperature trends in central part of Romania 53 changed until the end of the period (Croitoru and Piticar, 2014)
Annual and seasonal air temperature trends The results obtained by applying the MAKESENS methodology show that annual and seasonal mean air temperature highlights a significant increasing trend in the study area

Summary

Introduction

A lot of atmospheric processes, phenomena and natural hazards are closely linked to variability and trends of temperature. 2. Data and methodology Daily mean (TG), maximum (TX) and minimum (TN) air temperature data from three representative weather stations in the study region (Cluj-Napoca, Deva and Miercurea-Ciuc), covering a relevant period of 58 year-range (19612018), were used in order to perform this study (Figure 1).

Results

Conclusion