Прегледај по Аутор "Vagić, Nemanja"

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    Temporal Analysis of Urban-Suburban PET, mPET and UTCI Indices in Belgrade (Serbia)
    (MDPI, 2021) Pecelj, Milica; Matzarakis, Andreas; Vujadinović, Mirjam; Radovanović, Milan; Vagić, Nemanja; Ðurić, Dijana; Cvetkovic, Milena
    The analysis of the bioclimatic conditions is becoming increasingly relevant in climate interpretations for human needs, particularly in spatial planning, tourism, public health, sports events, bio-prognosis, etc. In this context, our study presents general temporal bioclimatic conditions in Belgrade, defined based on the PET, mPET and UTCI heat budget indices. Monthly, seasonal and annual indices were analyzed for urban and suburban weather stations based on 43 annual sets of meteorological data obtained by hourly observations at 7 h and 14 h CET. This study aims to present the distribution of PET, mPET and UTCI indices to show the pattern of each index in a mild climate location and to examine annual and seasonal differences of each index in the Belgrade urban center and suburban part of the city. The study results indicate higher biothermal stress in the urban area compared to the suburban zone and that the indices are congruent during the summer. At the same time, during the winter, they are more difficult to compare due to their peculiarities becoming more noticeable. The results obtained of all mean monthly and mean annual values of all three indices clearly indicate the difference that follows the definition of the urban heat island (UHI), particularly those from morning observation and winter season. The UTCI index shows the most significant monthly, seasonal and annual difference between urban and suburban areas for both observations. The annual difference of DUTCI7h amounts to 1.5 C is the same as the annual difference of minimum temperatures (Dtmin). In contrast, the annual differences of DPET7h DmPET7h are smaller (0.8 C and 0.7 C) and closer to the annual differences of maximum temperatures Dtmax amounted of 0.6 C.
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    THE ASSESSMENT OF HUMAN BIOCLIMATE OF VRANJE HEALTH RESORT (SERBIA) BASED ON UNIVERSAL THERMAL CLIMATE INDEX (UTCI) WITH THE FOCUS ON EXTREME BIOTHERMAL CONDITIONS
    (2021) Pecelj, Milica; Błażejczyk, Anna; Vagić, Nemanja; Ivanović, Peca
    The study deals with an assessment and interpretation of the bioclimatic conditions in Vranje (southern Serbia). The study aims at temporal distributions of bioclimatic conditions focussing on extreme thermal stress based on the Universal Thermal Climate Index (UTCI). The meteorological data required for the calculation of UTCI concern hourly (7 and 14 CET) weather data collected for the period 2000-2017. The frequency of very strong heat stress (VSHS), very strong cold stress (VSCS) and extreme cold stress (ECS) for both morning and midday hours. Furthermore, the daily difference of the UTCI hourly values (diurnal UTCI change) are specified, giving the daily variance of heat and cold stress. The results revealed the frequency of days in which thermal stress prevails for the studied period. The obtained results show an increase in extreme heat biothermal conditions, while extreme cold biothermal conditions are in decline, especially in the last 10 years. However, the frequency (the number of days) of very strong heat stress (VSHS) increased since 2007. A spectacular increase in heat stress was observed in the month of September, particularly in 2015.