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Warunki synoptyczne występowania inwersji termicznych w Krakowie w sezonie jesienno-zimowym

Trepińska J., Skublicka L.

Przegląd Geofizyczny

2001

Z. 4

351-361

The temperature inversions often appear in Cracow, especially during cold season (October--March). In this article the cases of appearance of temperature inversions in the years 1988-1998 were analysed, on the basis of data from Science Station of Department of Climatology at Jagiellonian University, situated at the Botanical Gardens. The thermometric measures done on height of 0,05, 0,50, 2,00 and 12 meters above ground level at 7.00 and 13.00 CET were used. The thermic structure in 12-meters air layer is complicated and the variety of negative lapse rate (inversion) is very high. The inversions were connected with types of synoptic situations. The calendar of the types of synoptic situations was prepared by T. Niedźwiedź. The thermic gradient in air layer between 0,05--0,50 m equals over 600°C/100 m. In air layer 0,05-0,50 m a. g. 1. the inversion were -26,l°C/100 m at 7.00 CET. The surface inversions are rather shallow. The temperature inversion appears during different synoptic situations, but the high frequency was at antycyclonic and cyclonic west type of synoptic situation and high wedge. At morning the high frequency of inversion was in March but at 1 p. m. in December.

Głębokie zimowe inwersje temperatury na nadmorskiej terasie okolic Stacji im. H. Arctowskiego (wyspa Króla Jerzego, Szetlandy Pd., Antarktyka Zach.)

Kruszewski K.

Problemy Klimatologii Polarnej

1998

nr 8

47--62

Paper presents results of investigations on temperature inversions, carried out during XIX Antarctic Expedition PAS in 1995, Temperature values taken from thermograph readings at Arctowski Station (3 m asl) and Point Thomas (173 m asl, situated 850 m, WNW from Station) were used to find periods of time with temperature inversions, Seven cases, analysed in this paper. Were selected as deep inversions (mean temperature gradient counted from hourly values was higher than 1°C/100 m), All presented inversions were radiation type, accompanied by calms and relatively small total nebulosity, except three cases, when nebulosity was the effect of inversion Influence of local orographic conditions on deepening temperature inversions is strong, but the main factor for it's forming is anticyclonic situation in the region of South Shetland Islands (accompanied by calms) and sea ice conditions. All analysed inversions were fonned during months with fast ice cover existence in Admiralty Bay and very close ar close ice fields on Bransfield Strait. In other ice conditions deep temperature inversions were not recorded, Minimum air temperatures at Arctowski Station recorded in July, August and September 1995 were measured during inversions. Maximum difference in air temperature between Point Thomas and Arctowski Station was recorded on July 22 (l4°C), These cases let to make conclusion, that probably all extremely low temperatures recorded during severe winters at Arctowski Station were measured in inversion conditions.