Wyniki wyszukiwania - Biblioteka Nauki

1

Pokrywa śnieżna w zachodniej części Beskidów Zachodnich

100%

Dyszy W. , Szyga-Pluta K.

|

nr 11 (71)

7-23

EN

The work presents the occurrence of snow cover in the western part of the Western Beskids in the years 1991–2020. We have analysed data from climate research stations of the IMGW-PIB located in Brenna, Laliki, Zawoja, Radziechowy (1991–2007)/Nowy Dwór (2008–2020). We calculated the number of days with snow cover for each winter seasons, the number of days with permanent snow cover, the potential duration of snow cover and the sum of seasonal snow cover thicknesses. The snowiness classes of Chrzanowski winters and the snowiness index of Paczos were determined from the sums of the thickness of the snow cover. The snowiest season was the 2005/06 winter season, while the thinnest snow cover was observed in the 2013/14 season. There are clear relationships between the height above sea level and the time of snow cover occurrence, as well as its thickness.

2

Inwersja temperatury powietrza w Tatrach w latach 1995–2020

100%

Grajek Z. , Szyga-Pluta K.

|

2021

|

nr 12 (72)

141-158

EN

This paper concerns the characteristics of the multi-annual, seasonal and daily variability of thermal inversion in the Tatra Mountains in 1995–2020. The analysis was performed on the basis of hourly measurements taken at the Institute of Meteorology and Water Management National Research Institute (IMGW-PIB) station in Kasprowy Wierch and Zakopane. The types of atmosphere circulation were determined found when the inversion was most frequent. The concentration of PM10 during the inversion and its intensity were analyzed and indicated that the number of inversion cases was growing. The analysis confirmed that inversions were most frequent in the cold season in the evening hours during anticyclonic circulation. Strong inversions occurred in the cold season. Winter inversions were associated with an increase in PM10 concentration.

3

Effect of regional baric systems on the occurrence of bioclimatic conditions in Poland

80%

Tomczyk A. M. , Bednorz E. , Szyga-Pluta K. , Owczarek M.

|

nr 1

161-177

EN

The present study concerns the determination of the characteristics of bioclimatic conditions, as well as the synoptic situations related to the occurrence of thermal stress conditions, in Poland. The study was based on daily data obtained from the Institute of Meteorology and Water Management – National Research Institute from the period 1966–2020 for 37 synoptic stations in Poland. Based on the obtained data, values of the Universal Thermal Climate Index (UTCI) were calculated. The occurrence of heat stress increases from the north to the south, corresponding with the variability of influx of solar radiation, and is modified by factors at a smaller spatial scale. The results of this paper evidently point to the cooling effect of the waters of the Baltic Sea. In circulation conditions favouring strong and very strong heat stress, e.g. in two of the designated circulation types (T1 and T2), the occurrence of an expansive high-pressure ridge in the Atlantic-European area is typical, stretching from the region of the Azores High towards the north-east, with a secondary high developed within its boundaries. In the third of the designated circulation types (T3), the high-pressure area extends from the Azores eastwards, reaching the Black Sea. Each of the three circulation patterns associated with the unfavourable biometeorological conditions of very strong and extreme cold stress in Poland is characterised by strong pressure centres formed in the Euroatlantic region, triggering the airflow from the northern (T4) or eastern (T5, T6) sector.

4

Patterns in the multiannual course of growing season in Central Europe since the end of the 19th century

80%

Szyga-Pluta K. , Tomczyk A. M. , Piotrowicz K. , Bednorz E.

|

nr 1

59-74

EN

The research identified patterns in the multiannual course of start and end dates, and length of growing season (GS) in Central Europe since the end of the 19th century in selected cities of Central Europe in the period 1893–2020. GS start in the analysed stations was characterised by high year-to-year variability, particularly in those located more southwards, i.e. in Prague and Vienna. A smaller variability occurred in GS end dates. The GS was subject to prolongation, although these changes in particular cities were uneven and had different causes. In Toruń and Potsdam, its increase was caused by a greater shift of the end date, and in the remaining stations, it was determined by its earlier start date. Two subperiods were distinguished that differ in terms of intensity of changes of the start and end dates, as well as the length of the GS. The intensification was observed recently.