Naslov
Long term analysis of thermal bioclimate at the Adriatic coast

Autori
Zaninović, Ksenija ; Matzarakis, Andreas

Izvornik
Annalen der Meteorologie (0072-4122) 41 (2005); 247-250

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, kongresno priopcenje, ostalo

Ključne riječi
physiological equivalent temperature (PET); variability and trends; Mann-Kendall statistics; progressive trend test; Hvar

Sažetak
The variations and trends of the physiological equivalent temperature (PET) and of the meteorological parameters influencing at human bioclimate are analyzed. The climatic changes are analysed during the period 1858-2000 at the meteorological station Hvar, from the beginning of meteorological measurements. Hvar is very attractive tourist destination on the island of Hvar in the middle Adriatic Sea. The trends were analysed for the annual and seasonal values of PET and the meteorological parameters that influence the thermal comfort. In order to remove short-term fluctuations in data series, they have been smoothed by means of the 11-year binomial moving average filter. The linear trends have been tested for significance by means of nonparametric Mann-Kendall rank statistics. For the series, which showed the significant trend identified by the Mann-Kendall coefficient t, a progressive analysis of the time series by means of the statistic u(t) was performed in order to determine the beginning of this phenomenon. Besides, the annual courses of daily values of PET during the warmest and coldest year of the period are also analysed. The PET fluctuations show a visible warming at the beginning of the century and about 50’ s, the cooling period until the beginning of 80’ s and again the warming from the beginning of 80’ s until the end of century. The PET changes are more pronounced that those in temperature as the result of the decreases in wind speed in the same periods. PET has the increasing trends in all seasons, but significant for the winter, autumn and annual values. These positive trends are the result of the increasing trend in temperature and decreasing trend in wind speed. The progressive trend test indicates at the beginning of positive trend of PET in 1988, becoming significant in 1994. The increasing trend of temperature started in 1946 and became significant in 1959. In spite of some similarities between PET and temperature trends, it is obvious that the variations in PET trend are the result of other meteorological parameters important for thermal comfort.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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