Temporal Variability of Summer Temperature Extremes in Poland

Wypych, Agnieszka; Sulikowska, Agnieszka; Ustrnul, Zbigniew; Czekierda, Danuta

doi:10.3390/atmos8030051

Cited by 28 publications

(25 citation statements)

References 47 publications

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“…The obtained results concerning temporal variability and tendencies of temperature extremes are confirmed by the results of research of other authors, obtained both for the area of Germany (Kundzewicz and Józefczyk 2008;Kundzewicz and Huang 2010;Tomczyk 2017) and the neighbouring countries, e.g., Poland (Wibig et al 2009;Michalska 2011;Tomczyk 2014;Wójcik and Miętus 2014;Wypych et al 2017), Czech Republic (Kyselý 2010), and France (Vidal et al 2010). As Tomczyk (2017) has shown, within the last 120 years in Potsdam, the largest number of heat waves was recorded between 2006 and 2015, although hot days were most numerous in 1947.…”

Section: Summary and Discussionsupporting

confidence: 86%

“…As Tomczyk (2017) has shown, within the last 120 years in Potsdam, the largest number of heat waves was recorded between 2006 and 2015, although hot days were most numerous in 1947. Wypych et al (2017) found positive trends in mean summer T max in Poland (0.4°C on the average) and number of days with extreme temperature (1.2 days per 10 years) which are similar (regarding the magnitude) to the demonstrated for lowland Germany. Summer seasons with enhanced heat wave characteristics identified for different parts of lowland Germany correspond to the European results, describing the summers of 1976, 1992, 1994, 2003, 2006, 2010 and 2015 as extremely hot in particular European regions (Kyselý 2010;Barriopedro et al 2011;Russo et al 2015;Hoy et al 2016;Wypych et al 2017).…”

Section: Summary and Discussionsupporting

confidence: 68%

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Heat waves in lowland Germany and their circulation-related conditions

Tomczyk

Sulikowska

2017

Meteorol Atmos Phys

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The research study aimed at assessing multiannual variability of heat wave occurrence in the lowland part of Germany between 1966 and 2015 and determining the role of atmospheric circulation in their occurrence. The analysis was conducted with the use of two independent datasets, that is, the dataset of Germany's National Meteorological Service, Deutscher Wetterdienst, and American meteorological reanalysis database of the National Centre for Environmental Prediction/National Centre for Atmospheric Research. This article defines a hot day as a day with maximum temperature of [30°C, and a heat wave as a sequence of at least three such days. The observed warming translated into an increase in a number of hot days and, consequently, an increase in the frequency of heat wave occurrence. In the analysed 50-year period, the smallest number of heat waves was observed between 1976 and 1985, and the largest number between 2006 and 2015 in the lowland part of Germany. The occurrence of heat waves in lowland Germany was related to anticyclonic circulation.

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Section: Summary and Discussionsupporting

confidence: 86%

Section: Summary and Discussionsupporting

confidence: 68%

Heat waves in lowland Germany and their circulation-related conditions

Tomczyk

Sulikowska

2017

Meteorol Atmos Phys

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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: 85%

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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“…Given that both the slope and significance of trends strongly depend on the choice of study period, the temporal variability analysis for air temperature was enhanced with running trend analysis previously used, e.g., by SanchezLorenzo et al (2015) and Pfeifroth et al (2018) for solar radiation and by Wypych et al (2017) …”

Section: Methodsmentioning

confidence: 99%

Temperature extremes in Alaska: temporal variability and circulation background

Sulikowska

Walawender

2018

Theor Appl Climatol

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The aims of this study are to characterize the spatial and temporal variability of extremely warm days (WDs) and warm spells (WSs) in summer as well as extremely cold days (CDs) and cold spells (CSs) in winter in Alaska in the years 1951-2015 and to determine the role of atmospheric circulation in their occurrence. The analysis is performed using daily temperature maxima (T MAX ) and minima (T MIN ) measured at 10 weather stations in Alaska as well as mean daily values of sea level pressure and wind direction at the 850 hPa isobaric level.WD (CD) is defined as a day with T MAX above the 95th (T MIN below the 5th) percentile of a probability density function calculated from observations, and WS (CS) equals at least three consecutive WDs (CDs). Frequency of the occurrence and severity of warm and cold extremes as well as duration of WSs and CSs is analyzed. In order to characterize synoptic conditions during temperature extremes, the objective classification scheme of advection types considering jointly the direction of the air influx and type of pressure system is employed.The results show that the general trend is towards the warmer temperatures, and the warming is greater in the winter than summer and for T MAX as opposed to T MIN . This is reflected in changes in the frequency of occurrence and intensity of temperature extremes which are much more pronounced in the case of winter cold extremes (decreasing tendencies) than summer warm extremes (increasing tendencies).The occurrence of temperature extremes is generally favored by anticyclonic weather with advection direction indicating air mass flows from the interior of the North American continent as well as the south (warm extremes in summer) and north (cold extremes in winter).

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Temporal Variability of Summer Temperature Extremes in Poland

Cited by 28 publications

References 47 publications

Heat waves in lowland Germany and their circulation-related conditions

Heat waves in lowland Germany and their circulation-related conditions

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

Temperature extremes in Alaska: temporal variability and circulation background

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