Analysis of the Universal Thermal Climate Index during heat waves in Serbia
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Published:2020-07-22
Issue:7
Volume:20
Page:2021-2036
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ISSN:1684-9981
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Container-title:Natural Hazards and Earth System Sciences
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language:en
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Short-container-title:Nat. Hazards Earth Syst. Sci.
Author:
Pecelj Milica M., Lukić Milica Z.ORCID, Filipović Dejan J., Protić Branko M.ORCID, Bogdanović Uroš M.
Abstract
Abstract. The objective of this paper is to assess the bioclimatic
conditions in Serbia during summer in order to identify biothermal heat
hazard. Special emphasis is placed on the bioclimatic index UTCI (Universal
Thermal Climate Index), whose purpose is to evaluate the degree of thermal
stress that the human body is exposed to. For this research, mean daily and
hourly (07:00 and 14:00 CET) meteorological data from three weather stations (Zlatibor, Novi Sad and Niš) have been collected for the period from 1998 to
2017. In order to identify patterns of biothermal heat stress conditions,
the thresholds of the daily UTCI (UTCI ≥38 ∘C, referred to
as very strong heat stress, VSHS) at 14:00 CET are compared with the thresholds
of daily maximum air temperature (tmax≥35 ∘C,
referred to as hot days, HDs), which are further termed as heat wave events
(HWEs). The findings show that the UTCI heat stress category “very
strong heat stress“ at 14:00 CET indicates heat waves. The most extreme heat
wave events occurred in 2007, 2012, 2015 and 2017. Moreover, three HWEs at Niš that occurred in July 2007 lasted 3, 10 and 4 d.
HWEs and very strong heat stress events (VSHSEs) recorded
in July 2007 (lasted 10 d each), 2012 (lasted 9 and 12 d) and 2015 (lasted
7 and 10 d) were of the longest duration and are considered to be the
indicators of biothermal heat hazard. The daily UTCI14 h heat stress
becomes more extreme in terms of severity and heat wave duration up to very
strong heat stress.
Publisher
Copernicus GmbH
Subject
General Earth and Planetary Sciences
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