@article{6057dfbd-726f-4d79-bf45-b8044060dd41,
author = {Urszula Kossowska-Cezak, Robert  Twardosz},
title = {Impact of atmospheric circulation on air temperature in Warsaw during months with extreme values of the NAO index (1951–2015)},
journal = {Geographical Studies},
volume = {2018},
number = {Issue 153},
year = {2018},
issn = {1644-3586},
pages = {69-87},keywords = {Atmospheric circulation; NAO; air temperature; Warsaw},
abstract = {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.},
doi = {10.4467/20833113PG.18.004.8479},
url = {https://ejournals.eu/en/journal/prace-geograficzne/article/uwarunkowania-cyrkulacyjne-temperatury-powietrza-w-warszawie-w-miesiacach-o-skrajnych-wartosciach-wskaznika-nao-1951-2015}
}