Heatwavesin Poland – frequency, trends and relationships with atmospheric circulation

Wibig, Joanna; Podstawczyńska, Agnieszka; Rzepa, Marcin; Piotrowski, Piotr

doi:10.7163/gpol.2009.1.3

Cited by 33 publications

(44 citation statements)

References 6 publications

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“…Of the exceptionally hot summer seasons in Poznań, one should especially mention the summers of 1992, 1994, 2006 and 2015. Similar results were also obtained in other regions of Poland [42][43][44]. As Sulikowska et al [27] have shown, the summer of 2015 was exceptionally hot in Poland, especially in the southwest of the country.…”

Section: Discussionsupporting

confidence: 78%

Thermal Conditions in the City of Poznań (Poland) during Selected Heat Waves

2018

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Abstract:The aim of the study was to characterise the occurrence of hot days and heat waves in Poznań in the 1966-2015 period, as well as to describe the thermal conditions in the city during selected heat waves between 2008 and 2015. The basis of the study was the daily maximum and minimum air temperature values for Poznań-Ławica station from 1966-2015 and the daily values of air temperature from eight measuring points located in the city in various land types from 2008 to 2015. A hot day was defined as a day with T max above the 95th annual percentile (from 1966 to 2015), while a heat wave was assumed to be at least five consecutive hot days. The research study conducted shows the increase of T max , number of hot days and frequency of heat waves in Poznań over the last 50 years. Across the area of the city (differentiation of urban area types according to Urban Atlas 2012), there was a great diversity of thermal conditions during the heat waves analysed.

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Section: Discussionsupporting

confidence: 78%

Thermal Conditions in the City of Poznań (Poland) during Selected Heat Waves

2018

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“…Wibig et al (2009) have shown that the frequencies of very warm and hot days increased in the period 1951-2006, especially in the second part of this period . The analysis was performed using records from six stations in Poland.…”

Section: Introductionmentioning

confidence: 99%

“…In Poland and Czech Republic the heat wave which occurred in 1994 was very intensive and widespread (Kysely 2002;Wibig et al 2009;Kysely 2010). A lot of attention has been devoted to the 2003 heat wave over Central-European countries (Beniston 2004;Black et al 2004;Zaitchik et al 2006), followed by another exceptional heat wave in July of 2006 in Central Europe (Kysely 2010), the heat wave in July 2010 in Eastern Europe (Barriopedro et al 2011) and the heat wave in Central Europe in August 2015 (Dong et al 2016;Duchez et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Heat waves in Poland in the period 1951-2015: trends, patterns and driving factors

Wibig¹

2017

Meteorol. Hydrol. Water Manage.

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Heat waves were analysed on the basis of maximum daily temperature from 24 meteorological stations in Poland. Heat waves are defined as the longest continuous period during which Tmax (daily maximum air temperature) is equal to or higher than 30°C in at least three days, the mean Tmax during the whole heat wave is equal or higher than 30°C and Tmax does not drop below 25°C during the whole period of heat wave duration. Heat waves occur in Poland from April to September with their maximums in July and August. Four-day-long heat waves are most frequent but the longest one lasted 31 days. The most persistent heat waves were in 1994 and 2015. An increasing trend in heat wave frequency and intensity is observed in Poland, however the increase is statistically significant at only about 60% of analysed stations. Four synoptic patterns favouring heat waves have been distinguished. A strong high over the Azores accompanies all of them, as well as slightly higher than normal pressure over Central Europethis causes calm and sunny weather over Poland. Strong blocking appears over the North Atlantic during heat wave events, proofing that the development of strong heat waves in Poland is related to large scale circulation and that they are not of local origin. The analysis of the impact of soil moisture in months leading up to the development of heat waves should be the next step in analysis.

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“…Jeszcze inaczej do rozwiązania problemu wydzielania fal upałów podszedł zespół pod kierunkiem Wibig ( 2009b ). Zamiast przyjąć sztywny minimalny czas wystę-powania warunków kryterialnych badacze określali, jak często występowały fale upałów o różnym czasie trwania.…”

Section: Dyskusjaunclassified

Ekstrema termiczne w Górach Świętokrzyskich na przełomie XX i XXI wieku

Jarzyna

2017

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thermal extremes in the Świętokrzyskie mts ( central poland ) at the turn of the 21 st centuryAbstract : The aim of this study was to determine the number of hot days, very hot days and very frosty days as well as heat waves and cold spells in the Świętokrzyskie Mts ( central Poland ) during the 1981 -2013 period. Datasets of minimum and maximum daily air temperatures from the IMGW-PIB stations : Kielce-Suków, Bodzentyn and Święty Krzyż were used in the study. During the last 35 years 17 heat waves and 12 cold spells occurred in the study area. The number of hot and very hot days and heat waves on the summits of the Świętokrzyskie Mts ( Święty Krzyż weather station ) was 2 -5 times lower than at the valley stations. There was an evident increase in the occurrence frequency of hot weather extremes in the 2001 -2010 period as compared to the end of the past century. There is no clear tendency to change in the number of very frosty days and cold spells. Two indices :WSNC and WSNZ were proposed as tools for the assessment of the intensity of heat waves and cold spells.

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Heatwavesin Poland – frequency, trends and relationships with atmospheric circulation

Cited by 33 publications

References 6 publications

Thermal Conditions in the City of Poznań (Poland) during Selected Heat Waves

Thermal Conditions in the City of Poznań (Poland) during Selected Heat Waves

Heat waves in Poland in the period 1951-2015: trends, patterns and driving factors

Ekstrema termiczne w Górach Świętokrzyskich na przełomie XX i XXI wieku

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