Variability of UTCI index in South Warsaw depending on atmospheric circulation

Abstract

The aim of the study is the assessment and analysis of the variability of human-bioclimatic conditions in southern part of Warsaw, depending on the atmospheric circulation in the long-term (1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015). The Universal Thermal Climate Index UTCI was applied to evaluate the human-bioclimatic conditions using meteorological data for the 12:00 UTC obtained from the WULS Ursynów weather station. In order to determine the relationship between the UTCI and its corresponding synoptic situation, the circulation type classification proposed by Lityński was used. It was found that the period from the second decade of April to the first decade of October is the most favourable one for recreation and relaxation. The situations not caused by thermal loads of humans are the most frequent and the values vary from 42.9% in October to 66.6% in August. Whereas weather conditions causing the 'strong' and 'very strong heat stresses' and the 'strong' and 'very strong cold stresses' were relatively rare. The analysis of influence of atmospheric circulation on bioclimatic conditions has shown that the most favourable conditions with no heat load (class 0) of the body occurred during cyclonic circulation in the summer (70%) mainly at advection from the North and South. Particular analysis of selected most strenuous days of the heat wave and the cold wave confirmed the occurrence of a high frequency of conditions stressing the human body with 'strong' and 'very strong heat' as well as 'strong cold' for most of the day during anticyclonic circulation in both cases.

Evaluation of the Effect of Urban Redevelopment on Surface Urban Heat Islands

“…Indeed, the latter depends on other parameters such as humidity, radiation, insolation or wind speed. To evaluate thermal comfort, several indices were proposed, such as the thermohygrometric index [97], the heat index [32,98], and the Universal Thermal Climate Index [99,100]. These quantitative indices can be combined with more qualitative approaches, such as commented paths [22,23].…”

Influence of NAO on forming the UTCI index in Kłodzko

“…These results are lower than the UTCI values for other areas of Poland due to the submontane character of Kłodzko. For comparison, Rozbicka and Rozbicki (2018) obtained for Warsaw around 3.5 to 9.3 • C in 1998• C in -2015• C in , and Ma ¸kosza (2013 for Lubuskie Voivodeship gave a range of UTCI fluctuations from 6.1 • C (for Zielona Góra and Gorzów Wielkopolski) to 8.1 • C in Słubice. In the years 1991-2000, Błażejczyk and Kunert (2011) showed the lowest for Warsaw value with a UTCI indicator of 4.1 • C. Similar absolute minimum values of UTCI were obtained by Ma ¸kosza (2013) and Błażejczyk et al (2014).…”

“…Idzikowska (2011) compared the bioclimatic situation in Warsaw with three other European capitals (Paris, Rome and Budapest). Against this background, research into the relationship between bioclimatic conditions and atmospheric circulation is still scarce in Poland (Bryś and Ojrzyńska 2016;Rozbicka and Rozbicki 2018).…”

Long-term changes of weather stimuli based on the example of the southern part of Warsaw – Ursynów

“…From 1970 to 2008 however, the immediate vicinity of the station was substantially changed as a result of the extension of the WULS-SGGW campus and the development of the Ursynów residential district. It infl uenced the thermal, bioclimatic and aerosanitary conditions of the air, which were the subject of research (Majewski, Przewoźniczuk & Kleniewska, 2014;Rozbicka, Majewski & Rozbicki, 2014;Rozbicka & Michalak, 2015;Rozbicki, Kleniewska, Majewski, Rozbicka & Gołaszewski, 2016;Rozbicka & Rozbicki, 2016b, 2018.…”