Extreme values of air temperature in Poland according to different atmospheric circulation classifications

Ustrnul, Zbigniew; Czekierda, Danuta; Wypych, Agnieszka

doi:10.1016/j.pce.2009.12.012

Cited by 53 publications

(41 citation statements)

References 7 publications

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“…A similar inflow direction of air masses was identified for Latvia (Avotniece et al 2010) and Estonia (Jaagus 2006). Ustrnul et al (2010) indicated, that the occurrence of 1979/80 and least frequently during 2000/01-2009/10. The occurrence of extreme warm and cold days creating heat and cold waves was connected to the positive SLP and z500 hPa anomalies, which indicates the existence of high pressure systems.…”

Section: Discussionsupporting

confidence: 70%

“…Bielec-Bąkowska and Piotrowicz (2013) determined trends in temperature changes in Poland between 1951 and 2006. Ustrnul et al (2010) evaluated the influence of atmospheric circulation on the occurrence of extreme air temperatures in Poland. Kriaučiūnienė et al (2012) analysed variability of air temperature and precipitation in Lithuania, Latvia and Estonia.…”

Section: Introductionmentioning

confidence: 99%

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Heat and cold waves on the southern coast of the Baltic Sea

Tomczyk

Bednorz

2014

Baltica

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The objective of this study was to describe the characteristics of heat and cold waves on the southern coast of the Baltic Sea, and determine synoptic situations causing the occurrence of the waves. The analysis concerned six stations located on the southern coast of the Baltic Sea. In the study, an extreme warm day was defined as a day with the maximum temperature over the 95 th annual percentile, while an extreme cold day as a day with the maximum temperature below the 5 th annual percentile. A sequence of at least five extreme warm and cold days was considered, i. e. heat or cold waves, respectively. In the analysed multiannual period, on the southern coast of the Baltic Sea, there were from 11 (Świnoujście) to 28 (Arkona) heat waves recorded, while the number of cold waves was from 34 (Świnoujście) to 43 (Kołobrzeg). The occurrence of extreme warm and cold days creating heat and cold days was connected with positive anomalies of sea level pressure and isobaric surface 500 hPa, which showed the presence of the high pressure systems.

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Section: Discussionsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Heat and cold waves on the southern coast of the Baltic Sea

Tomczyk

Bednorz

2014

Baltica

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“…10 Mean SLP and z500 hPa (a), SLP and z500 hPa anomalies (b) and anomalies of T850 (c) for the synoptic type 2 causing WSs cloud cover. The inflow of continental air masses from the eastern sector in summer, also in Central Europe, is connected with the occurrence of extreme temperatures or heat waves (Ustrnul et al 2010;Porębska and Zdunek 2013;Tomczyk 2014b). An alternative source of warm air masses causing the occurrence of heat waves in the analysed region was the inflow of air masses from the south and the south-west.…”

Section: Discussion and Summarymentioning

confidence: 99%

Warm spells in Northern Europe in relation to atmospheric circulation

Tomczyk

Piotrowski

Bednorz

2016

Theor Appl Climatol

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This study describes warm spells in Northern Europe and determines the synoptic situations that cause their occurrence. In this article, a relatively warm day was defined as a day when the maximum temperature exceeded the 95th annual percentile, and a warm spell (WS) was considered to be a sequence of at least five relatively warm days. In the analysed multiannual period and within the investigated area, 24 (Kallax) to 53 (Oslo) WSs were observed. The occurrence of WSs was mainly connected with positive anomalies of sea level pressure and a 500-hPa isobaric surface, displaying the presence of high-pressure systems. This occurrence was also accompanied by positive T850 anomalies.

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“…This suggests that the classification method properly distinguishes the circulation types, according to, e.g. KALKSTEIN et al (1987) and USTRNUL et al (2010). The largest differences in the median value between the circulation types and air temperature are observed in spring and reach 8°C in CdD and EACW.…”

Section: For Daily Rainfall At 2 M For E-obs (Blue) and Wrf (Green) mentioning

confidence: 85%

“…For example, OSUCHOWSKA-KLEIN (1992) and NIEDŹWIEDŹ (1981) analysed the relation between the air temperature and atmospheric circulation using a classification based on sea level pressure, while other authors proved that the spatial variability of air temperature and precipitation is highly correlated with the geopotential height at upper isobaric levels (WIBIG 1991(WIBIG , 2001KO_ zUCHOWSKI et al 1992). USTRNUL (2000) and USTRNUL et al (2010) have shown that a circulation type with anticyclonic ridge forms the most favourable conditions for the high air temperatures in summer. For winter, anticyclonic types with easterly flows are favourable for extremely low air temperatures.…”

Section: Introductionmentioning

confidence: 99%

High-Resolution Dynamical Downscaling of ERA-Interim Using the WRF Regional Climate Model for the Area of Poland. Part 2: Model Performance with Respect to Automatically Derived Circulation Types

Ojrzyńska¹,

Kryza²,

Wałaszek³

et al. 2016

Pure Appl. Geophys.

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Abstract-This paper presents the application of the high-resolution WRF model data for the automatic classification of the atmospheric circulation types and the evaluation of the model results for daily rainfall and air temperatures. The WRF model evaluation is performed by comparison with measurements and gridded data (E-OBS). The study is focused on the area of Poland and covers the 1981-2010 period, for which the WRF model has been run using three nested domains with spatial resolution of 45 km 9 45 km, 15 km 9 15 km and 5 km 9 5 km. For the model evaluation, we have used the data from the innermost domain, and data from the second domain were used for circulation typology. According to the circulation type analysis, the anticyclonic types (AAD and AAW) are the most frequent. The WRF model is able to reproduce the daily air temperatures and the error statistics are better, compared with the interpolation-based gridded dataset. The high-resolution WRF model shows a higher spatial variability of both air temperature and rainfall, compared with the E-OBS dataset. For the rainfall, the WRF model, in general, overestimates the measured values. The model performance shows a seasonal pattern and is also dependent on the atmospheric circulation type, especially for daily rainfall.

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Extreme values of air temperature in Poland according to different atmospheric circulation classifications

Cited by 53 publications

References 7 publications

Heat and cold waves on the southern coast of the Baltic Sea

Heat and cold waves on the southern coast of the Baltic Sea

Warm spells in Northern Europe in relation to atmospheric circulation

High-Resolution Dynamical Downscaling of ERA-Interim Using the WRF Regional Climate Model for the Area of Poland. Part 2: Model Performance with Respect to Automatically Derived Circulation Types

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