Title: Diversity of air humidity in the area of Toruń in 2012

Authors: USCKA-KOWALKOWSKA, J., PRZYBYLAK, R., KUNZ, M., MASZEWSKI, R., ARAŹNY, A., KEJNA, M.

Keywords: relative humidity, water vapour pressure, urban climate, Toruń

Abstract: In this article the problem of spatial diversity of the air humidity field in Toruń in 2012 is addressed. For this purpose, results of measurements taken at 5 sites located in different parts of the city were used. The air humidity is presented through its relative humidity (%) and the water vapour pressure (hPa). The obtained results indicate a substantial diversity of air humidity in the city, whether represented as mean annual, monthly or diurnal values. In the case of the relative humidity, the lowest mean value was observed in the city centre, at LO1 (75%), whereas the highest value was recorded in a wood at the LBI (82%) site, located in the east of the city. As far as the water vapour pressure is concerned, the highest annual mean values occurred in the city centre (LO1) and the woodland area (LBI) – 9.8 hPa each, whereas the lowest readings were observed at WRZ in the north of the city (9.4 hPa). The influence of the synoptic situations on the diversity of air humidity in the city was also analysed. Both the relative humidity and the water vapour pressure were found to be slightly more diversified within the city when anticyclonic pressure systems prevailed, as compared to cyclonic systems. Only in the summer, between LO1 (city centre) and LBI (woodland in the east), did the correlation reverse. The diversity of air humidity is affected by meteorological elements. The problem was studied on the basis of the observations made at the LO1 and WRZ sites. A statistically significant correlation was found in the values of the difference in relative humidity and wind speed in all seasons of the year. In the case of cloudiness, its amount is significantly correlated with the differences in the water vapour pressure, but no correlation was found of this element with the relative humidity.

APA style references: Uscka-Kowalkowska, J., Przybylak, R., Kunz, M., Maszewski, R., Araźny, A. & Kejna, M. (2014). Diversity of air humidity in the area of Toruń in 2012. Scientific Review Engineering and Environmental Sciences, 23 (4), 393-409.

APA style citation in text: The first time citation in text: (Uscka-Kowalkowska et al., 2014), next citation: (Uscka-Kowalkowska et al., 2014)

Chicago style references: Uscka-Kowalkowska, Joanna, Rajmund Przybylak, Mieczysław Kunz, Rafał Maszewski, Andrzej Araźny, Marek Kejna. "Diversity of air humidity in the area of Toruń in 2012." Scientific Review Engineering and Environmental Sciences, 66 ser., vol. 23, no 4, (2014): 393-409.

Chicago style citation in text: (Uscka-Kowalkowska et al. 2014)

Bibtxt style references: @article{Uscka-Kowalkowska_Przybylak_Kunz_Maszewski_Araźny_Kejna_2014_PNIKS, author={Uscka-Kowalkowska, Joanna and Przybylak, Rajmund and Kunz, Mieczysław and Maszewski, Rafał and Araźny, Andrzej and Kejna, Marek}, title={Diversity of air humidity in the area of Toruń in 2012.}, journal={Scientific Review Engineering and Environmental Sciences}, URL={http://iks_pn.sggw.pl/PN66/A6/art6.pdf}, year={2014}, volume={23 (4)}, number={66}, pages={393-409}}

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