Fig. 1

Fig. 2

Fig. 3

Fig. 4
![Mean SLP [in hPa] (colour scale) and z500 hPa [in gpm] (dotted line) (A) anomalies of SLP [in hPa] (colour scale) and z500 hPa [in m] (dotted line) (B) and anomalies of T850 [in °C] (C) for days with very strong and extreme cold stress. SLP, sea level pressure.](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/647351144e662f30ba539ed7/j_quageo-2022-0028_fig_004.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA6AP2G7AKCDONMZAN%2F20260306%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20260306T024213Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEBAaDGV1LWNlbnRyYWwtMSJGMEQCIB8ZCgA%2BITwkrLg4cnkcH0tVrg7wv5sK6alW9sKaRKxzAiBBSg5OmnF7%2F1jtCsDBMVYEynvzFRAKOE5xlECGOFxzlirGBQjZ%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAIaDDk2MzEzNDI4OTk0MCIMSh2Fvmj%2BYJ6%2BFiFHKpoFcxj2xw7KvISCwH1sZjbeZrm00ICCP6Ukh2jgPIW0Liw5GZ5l1kxqph5PPXSq%2FYvg6PnJLnN%2BZdjqeAdSvDsQekqaIvGVEgidsjTbdoD3Qac7xVsRfX%2Fkva6c1f1mJLf2TevyZNPjmi4Xm2xareLUjdbR5hhtppSbX%2FRQMWPVDj6L3Q00KxoVWSVGHahflQP5Y1tJC1FdWR6oJ8HzmCNYUVP%2BJJbovvAwHYo8RPeKdRT7HgVqkwhu7ldFezF9LLxyi3a0SDJWicZE%2BdMgj3BJ5EulZodXYi2y3ogTvD0X064DGdaNILr2%2F9zjb4hEv%2B095o9ggYM0HV5Ygh1ymP2%2B%2BaSPPOIUaAhrt00KEmBdrJ%2FKxhKTzbNTrDwITf0TVMY0o04xGx7OZK1CgTxOpw2XkvGF4i3I2gI4ShVJZKPJFO0KqC0Sp0TSweAsE78NaLHzGMMHf74p5WheUWQPLNFIW3jO3Isxmi9q66jxGjVxOpXkGshxVgQrdStFsf1HYc3AJQEfeE2nQudzOjb7uVAgcqzahmsjQWKAxtQRbkzL6w9DejusPhGbTxH71UtCi542QG%2BSD1uA%2BmDvykaxiQD%2FI3SeA9sNZPikPCHfEBCzVgWI8x%2Bk8WoKArWdR8T%2FnVTjZi11bSozZIFQaoBJtjmn6AiEAA9NDvf2RqXB1B9uPCrX24Xi%2FotmhYXlm8BQA0wZQUvViJtCV1MfXvbd1GDkrMKQGe8fBahc8nwqhfJV5avSfUVeoR73%2F8MrVDKtiFoROZroDCOz4YmHkAKTxo%2BRVy%2FmfwJ5i%2FBl4auh%2FhqHz0IytWov2IKe3e2b3De40ODEX6YMNzsi03FkO1MrE7ZIp1q3MwjDbQPj18YrM2VLli4MvwZj7VtiWjanML2lqM0GOrIBP1LbySlujbP5H1A2gMMwwOQT7ZmxjRmm4tl%2B4oybsf2c378wHG%2BZjULMnmT4PpLnDc5B2Cq44GWkuqyURa2pGjJfMxWw%2BJiWgp2ix1pBBhMsxWMF1hPgBlgofobwrYWzcBNmxYXejlDmSou1sXRDnOhq9KFI4YAb9UNzvB1RNW1YlY6ndwwkGMCOaj1i%2FQH4ccph1FLpoOEUug4IesZijcbW8l2js12WkoIZVsT3s60QVA%3D%3D&X-Amz-Signature=4ce0646ff58dda9f2daba9d87f9b738755a8d24a982c3fe84030bbda5d955089&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 5
![Mean SLP [in hPa] (colour scale) and z500 hPa [in gpm] (dotted line) (left column); SLP [in hPa] (colour scale) and z500 hPa anomalies [in m] (dotted line) (middle column); and anomalies of T850 [in °C] (right column) for the designated circulation types. SLP, sea level pressure.](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/647351144e662f30ba539ed7/j_quageo-2022-0028_fig_005.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA6AP2G7AKCDONMZAN%2F20260306%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20260306T024213Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEBAaDGV1LWNlbnRyYWwtMSJGMEQCIB8ZCgA%2BITwkrLg4cnkcH0tVrg7wv5sK6alW9sKaRKxzAiBBSg5OmnF7%2F1jtCsDBMVYEynvzFRAKOE5xlECGOFxzlirGBQjZ%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAIaDDk2MzEzNDI4OTk0MCIMSh2Fvmj%2BYJ6%2BFiFHKpoFcxj2xw7KvISCwH1sZjbeZrm00ICCP6Ukh2jgPIW0Liw5GZ5l1kxqph5PPXSq%2FYvg6PnJLnN%2BZdjqeAdSvDsQekqaIvGVEgidsjTbdoD3Qac7xVsRfX%2Fkva6c1f1mJLf2TevyZNPjmi4Xm2xareLUjdbR5hhtppSbX%2FRQMWPVDj6L3Q00KxoVWSVGHahflQP5Y1tJC1FdWR6oJ8HzmCNYUVP%2BJJbovvAwHYo8RPeKdRT7HgVqkwhu7ldFezF9LLxyi3a0SDJWicZE%2BdMgj3BJ5EulZodXYi2y3ogTvD0X064DGdaNILr2%2F9zjb4hEv%2B095o9ggYM0HV5Ygh1ymP2%2B%2BaSPPOIUaAhrt00KEmBdrJ%2FKxhKTzbNTrDwITf0TVMY0o04xGx7OZK1CgTxOpw2XkvGF4i3I2gI4ShVJZKPJFO0KqC0Sp0TSweAsE78NaLHzGMMHf74p5WheUWQPLNFIW3jO3Isxmi9q66jxGjVxOpXkGshxVgQrdStFsf1HYc3AJQEfeE2nQudzOjb7uVAgcqzahmsjQWKAxtQRbkzL6w9DejusPhGbTxH71UtCi542QG%2BSD1uA%2BmDvykaxiQD%2FI3SeA9sNZPikPCHfEBCzVgWI8x%2Bk8WoKArWdR8T%2FnVTjZi11bSozZIFQaoBJtjmn6AiEAA9NDvf2RqXB1B9uPCrX24Xi%2FotmhYXlm8BQA0wZQUvViJtCV1MfXvbd1GDkrMKQGe8fBahc8nwqhfJV5avSfUVeoR73%2F8MrVDKtiFoROZroDCOz4YmHkAKTxo%2BRVy%2FmfwJ5i%2FBl4auh%2FhqHz0IytWov2IKe3e2b3De40ODEX6YMNzsi03FkO1MrE7ZIp1q3MwjDbQPj18YrM2VLli4MvwZj7VtiWjanML2lqM0GOrIBP1LbySlujbP5H1A2gMMwwOQT7ZmxjRmm4tl%2B4oybsf2c378wHG%2BZjULMnmT4PpLnDc5B2Cq44GWkuqyURa2pGjJfMxWw%2BJiWgp2ix1pBBhMsxWMF1hPgBlgofobwrYWzcBNmxYXejlDmSou1sXRDnOhq9KFI4YAb9UNzvB1RNW1YlY6ndwwkGMCOaj1i%2FQH4ccph1FLpoOEUug4IesZijcbW8l2js12WkoIZVsT3s60QVA%3D%3D&X-Amz-Signature=9053538620e9ae8d0074d2762b96de47276cb5463d9f5c474f9fbbe210dda479&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 6

Fig. 7
![Mean SLP [in hPa] (colour scale) and z500 hPa [in gpm] (dotted line) (top row); SLP [in hPa] (colour scale) and z500 hPa anomalies [in m] (dotted line) (middle row); and anomalies of T850 [in °C] (bottom row) for the selected days. SLP, sea level pressure.](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/647351144e662f30ba539ed7/j_quageo-2022-0028_fig_007.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=ASIA6AP2G7AKCDONMZAN%2F20260306%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20260306T024213Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEBAaDGV1LWNlbnRyYWwtMSJGMEQCIB8ZCgA%2BITwkrLg4cnkcH0tVrg7wv5sK6alW9sKaRKxzAiBBSg5OmnF7%2F1jtCsDBMVYEynvzFRAKOE5xlECGOFxzlirGBQjZ%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAIaDDk2MzEzNDI4OTk0MCIMSh2Fvmj%2BYJ6%2BFiFHKpoFcxj2xw7KvISCwH1sZjbeZrm00ICCP6Ukh2jgPIW0Liw5GZ5l1kxqph5PPXSq%2FYvg6PnJLnN%2BZdjqeAdSvDsQekqaIvGVEgidsjTbdoD3Qac7xVsRfX%2Fkva6c1f1mJLf2TevyZNPjmi4Xm2xareLUjdbR5hhtppSbX%2FRQMWPVDj6L3Q00KxoVWSVGHahflQP5Y1tJC1FdWR6oJ8HzmCNYUVP%2BJJbovvAwHYo8RPeKdRT7HgVqkwhu7ldFezF9LLxyi3a0SDJWicZE%2BdMgj3BJ5EulZodXYi2y3ogTvD0X064DGdaNILr2%2F9zjb4hEv%2B095o9ggYM0HV5Ygh1ymP2%2B%2BaSPPOIUaAhrt00KEmBdrJ%2FKxhKTzbNTrDwITf0TVMY0o04xGx7OZK1CgTxOpw2XkvGF4i3I2gI4ShVJZKPJFO0KqC0Sp0TSweAsE78NaLHzGMMHf74p5WheUWQPLNFIW3jO3Isxmi9q66jxGjVxOpXkGshxVgQrdStFsf1HYc3AJQEfeE2nQudzOjb7uVAgcqzahmsjQWKAxtQRbkzL6w9DejusPhGbTxH71UtCi542QG%2BSD1uA%2BmDvykaxiQD%2FI3SeA9sNZPikPCHfEBCzVgWI8x%2Bk8WoKArWdR8T%2FnVTjZi11bSozZIFQaoBJtjmn6AiEAA9NDvf2RqXB1B9uPCrX24Xi%2FotmhYXlm8BQA0wZQUvViJtCV1MfXvbd1GDkrMKQGe8fBahc8nwqhfJV5avSfUVeoR73%2F8MrVDKtiFoROZroDCOz4YmHkAKTxo%2BRVy%2FmfwJ5i%2FBl4auh%2FhqHz0IytWov2IKe3e2b3De40ODEX6YMNzsi03FkO1MrE7ZIp1q3MwjDbQPj18YrM2VLli4MvwZj7VtiWjanML2lqM0GOrIBP1LbySlujbP5H1A2gMMwwOQT7ZmxjRmm4tl%2B4oybsf2c378wHG%2BZjULMnmT4PpLnDc5B2Cq44GWkuqyURa2pGjJfMxWw%2BJiWgp2ix1pBBhMsxWMF1hPgBlgofobwrYWzcBNmxYXejlDmSou1sXRDnOhq9KFI4YAb9UNzvB1RNW1YlY6ndwwkGMCOaj1i%2FQH4ccph1FLpoOEUug4IesZijcbW8l2js12WkoIZVsT3s60QVA%3D%3D&X-Amz-Signature=33d19f47bf3521b70f5ba90b3bcf0f2d89dd51dd4a9ec10f015322f4662141b6&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Selected characteristics of the number of days with very strong and extreme cold stress according to UTCI in Poland, 1966/67 to 2018/19: their maximum number and trend coefficient_ Statistically significant (at 0_05 level) trend values are in bold_
| Station | Maximum number of days and season of their occurrence | Trend (days· decade−1) |
|---|---|---|
| Białystok | 42 1971/72 | −3.53 |
| Bielsko-Biała | 17 1967/68 | −0.91 |
| Borucino | 48 1969/70 | −2.33 |
| Chojnice | 7 1978/79 1986/87 | 0.00 |
| Elbląg | 19 1969/70 | −0.34 |
| Gdańsk | 15 1978/79 | 0.00 |
| Gorzów Wlkp. | 13 1978/79 | −0.57 |
| Hel | 16 1978/79 | −0.29 |
| Jelenia Góra | 10 1975/76 | −0.36 |
| Kalisz | 15 1986/87 | 0.00 |
| Katowice | 6 1978/79 | −0.31 |
| Kielce | 12 1984/85 | −0.24 |
| Kłodzko | 9 1969/70, 1977/78, 1983/84, 1984/85 | −0.34 |
| Kołobrzeg | 8 1978/79 | −0.53 |
| Koszalin | 9 1978/79 | −0.59 |
| Kraków | 14 1968/69 | 0.00 |
| Lesko | 15 1978/79 | −1.43 |
| Lublin | 13 1986/87 | 0.00 |
| Łeba | 19 1978/79 1986/87 | 0.00 |
| Łódź | 16 1969/70 | −0.99 |
| Mikołajki | 47 1971/72 | −4.62 |
| Mława | 28 1971/72 | −1.67 |
| Olsztyn | 12 1969/70 | 0.00 |
| Opole | 5 1978/79 | −0.31 |
| Poznań | 14 1978/79 | −0.49 |
| Racibórz | 10 1986/87 | 0.00 |
| Rzeszów | 21 1968/69 | −0.35 |
| Siedlce | 17 1986/87 | −0.81 |
| Słubice | 6 1978/79 | −0.29 |
| Suwałki | 34 1978/79 | −4.00 |
| Świnoujście | 16 1986/87 | −0.53 |
| Szczecin | 11 1978/79 | 0.00 |
| Terespol | 20 1968/69 | −0.59 |
| Toruń | 9 1978/79 | −0.53 |
| Ustka | 10 2010/11 | 0.00 |
| Warszawa | 19 1969/70, 1986/87 | −0.67 |
| Włodawa | 21 1978/79 | −0.48 |
| Wrocław | 9 1978/79 | −0.38 |
| Zakopane | 4 1967/68 | −0.18 |
| Zielona Góra | 9 1978/79 | −0.33 |