Diversity of Air Temperature in Poland in the Years 1971-2010

Krużel, Joanna; Ziernicka–Wojtaszek, Agnieszka

doi:10.12911/22998993/65230

Cited by 5 publications

(3 citation statements)

References 1 publication

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“…The situation in the case of lakes in Central Europe is explained by Woolway et al [49], concluding that it is a response to a change in the climatic regime. In the context of air temperatures [50,51], they will determine the transformation of their thermal conditions. The statement is confirmed by predictive estimations of changes in water temperature in lakes [52,53].…”

Section: Discussionmentioning

confidence: 99%

Effect of Environmental Conditions and Morphometric Parameters on Surface Water Temperature in Polish Lakes

Ptak

Sojka

Choiński

et al. 2018

Water

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The study evaluated the effect of environmental conditions and morphometric parameters on lake water temperature changes. The analysis was carried out on the basis of 14 lakes located in northern Poland. The assessment was based on the daily water and air temperatures from 1972 to 2016. It took into account the location of lakes (latitude, longitude, altitude) morphometric parameters (surface area, maximum and mean depth, volume), hydrological processes (rate of water exchange, course of ice phenomena), and trophic status (water transparency) as factors that can modify lake water temperature changes. Direction and rate of air and water temperature changes were analysed by means of Mann-Kendall's and Sen's tests. Cluster analysis (CA) was applied to group lakes characterised by similar water temperature changes. The effect of climatic and non-climatic parameters on a lake's water temperature was assessed on the basis of principal component analysis (PCA). Water temperatures in the lakes in the years 1972-2016 were characterised by a higher rate of increase of 0.43 • C·dec −1 than the air temperature decrease of 0.34 • C·dec −1 . The analysis showed a faster rate of heating of waters in western Poland. This can be explained by shorter duration of ice cover. Moreover, the changes of water temperature were affected by other factors, including the location of the lakes, their morphometric parameters, wind speed, water transparency and water exchange time.

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Section: Discussionmentioning

confidence: 99%

Effect of Environmental Conditions and Morphometric Parameters on Surface Water Temperature in Polish Lakes

Ptak

Sojka

Choiński

et al. 2018

Water

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“…Among various aspects of the analyses one of the main is an assessment of impact of climate change on lake regimes in regard to ice phenomena. In light of the observed changes in climate conditions (Sulikowska et al, 2016;Krużel, Ziernicka-Wojtaszek, 2016), it is important to gather detailed information on directions and pace of changes in ice processes and phenomena.…”

Section: Introductionmentioning

confidence: 99%

Changes in Ice Regime of Jagodne Lake (North-Eastern Poland)

Ptak¹,

Sojka²,

Nowak³

2019

Acta Sci. Pol. Formatio Circumiectus

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Aim of the study Indication of directions and pace of changes in ice regime of Jagodne Lake in 1975-2015. An analysis of predictability of ice phenomena in relation to stability and seasonality and an understanding mutual interactions between parameters describing ice regime of the lake. Material and methods Data from the Jagodne Małe water gauge station on Jagodne Lake, concerning: the dates of the beginning and the end of ice phenomena, the beginning and the end of ice cover, and the thickness of ice cover from 1975-2015. Average monthly air temperature from the IMGW-PIB synoptic station in Mikołajki. Statistical analysis based on trend analysis using the non-parametric Mann-Kendall test and the Colwell method. Results and conclusions The research has proven that Jagodne Lake shows some tendencies to change in ice regime over the last four decades. These trends should be identified with a successive shortening of ice season and a decrease of the thickness of ice cover. However, these changes in the case of the beginning and the end of ice phenomena (including ice cover) and the thickness of ice cover are not statistically significant. Only shortening of ice phenomena duration was observed and confirmed by the Mann-Kendall statistical test. The analyzed object reacts similarly to most of lakes, for which research on changes in icing was conducted. The observed increase of average temperatures in April had an influence on shortening of ice phenomena.

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“…at the pressure of 100 kPa the resulting air temperature is 18.9°C. It differs significantly from the average annual outdoor air temperature in Poland [22,23] of about 8°C, at which fresh air is delivered to interior of buildings via infiltration and ventilation.…”

Section: Ventilation Heat Lossmentioning

confidence: 80%

Ventilation heat loss in a multifamily building under varying air density

Michalak

2020

Journal of Mechanical and Energy Engineering

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Standards related to calculation methods used in building energy performance simulation tools usually impose constant volumetric heat capacity of air. However, this simplification may result in errors if the actual conditions differ from the assumptions made. The paper presents the problem of dry air density and specific heat capacity variation and their influence on calculated energy use for space heating in a multifamily building. The monthly calculation method of PN-EN ISO 13790 was used. Simulations were performed in five cities, each in one climatic zone according to PN-EN 12831. Variation of the air density caused by air temperature and elevation resulted in differences in calculated heating demand from-4.5% to 4.5% in relation to that at constant volumetric heat capacity assumed in PN-EN ISO 13790.

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Diversity of Air Temperature in Poland in the Years 1971-2010

Cited by 5 publications

References 1 publication

Effect of Environmental Conditions and Morphometric Parameters on Surface Water Temperature in Polish Lakes

Effect of Environmental Conditions and Morphometric Parameters on Surface Water Temperature in Polish Lakes

Changes in Ice Regime of Jagodne Lake (North-Eastern Poland)

Ventilation heat loss in a multifamily building under varying air density

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