TY - JOUR
TI - Uwarunkowania cyrkulacyjne temperatury powietrza w Warszawie w miesiącach o skrajnych wartościach wskaźnika NAO (1951–2015)
AU - Kossowska-Cezak, Urszula
AU - Twardosz, Robert
TI - Uwarunkowania cyrkulacyjne temperatury powietrza w Warszawie w miesiącach o skrajnych wartościach wskaźnika NAO (1951–2015)
AB - 
	Impact of atmospheric circulation on air temperature in Warsaw during months with extreme values of the NAO index (1951–2015)

	In winter, western air masses arriving in Europe, including Poland, change the weather for relatively warmer, while an eastern advection tends to bring freezing temperatures. While the NAO provides a quantitative measure of this western advection, its relationship with air temperature is not always clear-cut. For this reason, this study characterises the circulation and thermal conditions over Poland depending on the sign and the value of the NAO index (NAO+, NAO–).
	The study is based on NAO values and winter (December – March) monthly temperature records in Warsaw spanning 65 years (1951–2015), as well as on the calendar of circulation types proposed by Lityński. A detailed analysis was performed looking at the top 10 months with the highest NAO+ and NAO–, as well as the top 10 months with the greatest positive and negative deviations from the long-term average air temperature (Dt). This selection was based on a premise that the months should largely coincide. The results, however, show certain deviations from previously established patterns in the influence of the NAO+/NAO– on air temperature in Poland.
VL - 2018
IS - Zeszyt 153
PY - 2018
SN - 1644-3586
C1 - 2083-3113
SP - 69
EP - 87
DO - 10.4467/20833113PG.18.004.8479
UR - https://ejournals.eu/czasopismo/prace-geograficzne/artykul/uwarunkowania-cyrkulacyjne-temperatury-powietrza-w-warszawie-w-miesiacach-o-skrajnych-wartosciach-wskaznika-nao-1951-2015
KW - Atmospheric circulation
KW - NAO
KW - air temperature
KW - Warsaw