Abstract
The aim of this paper is to understand the role of the macrocirculation factor in shaping the dynamics of long-term bioclimatic conditions, with reference to Kłodzko in the Polish part of the Central Sudetes. The variability of bioclimatic conditions in Kłodzko for the period 1966–2017 was analysed, exposing its local specificity. The Universal Thermal Climate Index (UTCI) was taken as an indicator of the analysed bioclimatic features. The influence of the North Atlantic Oscillation (NAO) on the variability of this index and its constituent meteorological elements, e.g. air temperature, vapour pressure, wind speed, and solar conditions, was examined. On the basis of the winter NAO Hurrell coefficient, the analysed years were divided into two opposing groups representing either a negative or positive Hurrell index. A comparison between these two year-groups for the mean values of UTCI and the examined meteorological elements showed a clear intergroup difference in these values. Except for cloudiness, the importance of the macrocirculation genesis of NAO was verified by the statistically significant correlation between the Hurrell index on the one hand and the tested UTCI index and its constituent meteorological elements on the other.
Highlights
Bioclimatic conditions are used to asses climate changes, health research, epidemiology, military or urban planning in order to determine the attractiveness of tourist places
The aim of this paper is to investigate the impact of the macrocirculatory phenomenon, i.e. the North Atlantic Oscillation (NAO), on the dynamics of long-term bioclimatic impacts on the human body in outdoor conditions of a mediumsized city in the Sudetes (Central Europe)
The paper provides an analysis of the macrocirculation origin of changes in the Universal Thermal Climate Index (UTCI) for Kłodzko and its meteorological elements for the period 1966–2017
Summary
Bioclimatic conditions are used to asses climate changes, health research, epidemiology, military or urban planning in order to determine the attractiveness of tourist places. The UTCI has been frequently used in bioclimatic analyses by many Polish scientists. Such analyses were conducted for Warsaw (Błazejczyk et al 2014), for Kołobrzeg, and for Poznanand Szczawno (Okoniewska and Wiecław 2013). 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 (Brysand Ojrzynska 2016; Rozbicka and Rozbicki 2018)
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