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Tytuł:
Przestrzenna i czasowa zmienność cyrkulacji atmosferycznej na obszarze Polski
Spatial and Temporal Variability of Atmospheric Circulation in the Area of Poland
Autorzy:
Piotrowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/163869.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwa Geofizyczne
Tematy:
cyrkulacja atmosferyczna
dynamika cyrkulacji atmosferycznej
zmienność przestrzenna cyrkulacji atmosferycznej
atmospheric circulation
atmospheric circulation dynamic
spatial variability of atmospheric circulation
Opis:
Oceny zmienności warunków cyrkulacyjnych na obszarze Polski względem jej centrum dokonano na podstawie charakteru cyrkulacji atmosferycznej, kierunku adwekcji i typologii cyrkulacyjnej opartej na dwóch wymienionych wskaźnikach cyrkulacji. Wyniki analizy poszczególnych wskaźników cyrkulacji atmosferycznej wykazały duży spadek zgodności wskaźników wraz z oddalaniem się od centrum Polski. Największą zgodność uzyskano w przypadku charakteru cyrkulacji atmosferycznej, a najmniejszą w przypadku typów cyrkulacji. W odległości 100 km od centralnego punktu wzorcowego stwierdzono zmianę typu cyrkulacji atmosferycznej w ok. 20-25% przypadków, a w odległości 300 km – w ok. 40%, a na południu Polski nawet więcej niż w połowie przypadków. Dynamikę zmian warunków cyrkulacyjnych na obszarze Polski sprawdzono opierając się na 16 typach cyrkulacji atmosferycznej określonych co 6 godzin i wyznaczonych metodą Jenkinsona i Collisona. Największe przestrzenne zróżnicowanie częstości zmian typu cyrkulacji atmosferycznej na inny odnotowano latem, a najmniejsze jesienią.
Evaluations of the variability of the atmospheric circulation in the area of Poland in relation to the center of country taken into account of the cyclonic and anticyclonic circulation, the direction of advection and circulation typology based on the above-mentioned two indices of atmospheric circulation. The results of the analysis of particular atmospheric circulation indices showed a significant decrease in the compatibility indices with distance from the center of Poland. The highest compatibility was obtained in the case of the cyclonic and anticyclonic circulation, and the lowest in the case of atmospheric circulation types. At a distance of 100 km from a center of reference point the type of atmospheric circulation changes in approx. 20-25% of cases, and at a distance of 300 km - in approx. 40%, and in the southern part of country even more than half of the cases. The dynamics of changes in the circulation conditions in the area of Poland were checked on the basis of 16 atmospheric circulation types determined every six hours based on the Jenkinson’s and Collison’s method. The highest spatial diversification of frequency of transition the specified atmospheric circulation type to another occurred in summer and lowest in autumn.
Źródło:
Przegląd Geofizyczny; 2017, 1-2; 45-54
0033-2135
Pojawia się w:
Przegląd Geofizyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność cyrkulacji atmosfery nad Spitsbergenem w drugiej połowie XX wieku
Variability of atmospheric circulation above Spitsbergen in the second half of 20th Century
Autorzy:
Niedźwiedź, T.
Powiązania:
https://bibliotekanauki.pl/articles/260957.pdf
Data publikacji:
2001
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
cyrkulacja atmosfery
Spitsbergen
atmospheric circulation
Opis:
The study presents variability of different circulation indices above the Spitsbergen for the period 1951-2000. Investigated area covers the part of the Atlantic sector of the Arctic located between 75-80°N and 0-30°E. The study based on the original calendar of circulation types (Niedźwiedź 1981, 2001), prepared with the help of the synoptic maps of Europe (Europäischer Wetterbericht, 1976-2000, Tägliche Wetterbericht 1950-1975). Twenty circulation types have been distinguished. The advection directions are marked by the capital letters while the anticyclonic situations by the subscript a and the cyclonic ones by subscript c; for example, Wa and Wc denote the anticyclonic and cyclonic situations respectively, with the air advection from the West. Thus, there are 16 circulation types with definite directions of the air masses. The other 5 situations are nonadvective: Ca - centre of anticyclone, Ka - anticyclonic wedge, Cc - centre of cyclone, Bc - cyclonic trough, and x - col and the situations which cannot be classified. This classification is similar to Lamb (1972) types and based on methods described in the most important works in synoptic climatology (Barry an Perry 1974, Yarnal 1993). The frequencies of the occurrence of all the distinguished circulation types for the 50-years period of 1951-2000 are presented on the table 4. On the average, the anticyclonic wedge (Ka ? 10.4 %) is the most frequent in the Spitsbergen. The second one is situation Ec and NE occurs during 9.9 and 8.8% of the days. The centre of high pressure over Spitsbergen (1.3 % of the days) and the NW situation (1.5 % of the days) are the least frequent. Weather and climate of Spitsbergen are modelled by the intensive cyclonic activity during 56 % of the days in a year. The largest frequency of the occurrence of low pressure systems is characteristic for the period from September to March with maximum in November (66 %), December and January (65%). The number of days with high pressure systems exceeds 50 % only in May (59 %). The variability of circulation have been obtained using the simple circulation indices: zonal westerly circulation W index, similar to P progression index, index of southerly circulation - S, and index of cyclonicity - C, as proposed by R. Murray and R. Lewis (1966) with some modifications. The author of this paper calculated these indices for each year, season and month (tables 1-3). The most characteristic for Spitsbergen is the zonal form of circulation with the eastern component (W = -147 for a year) with the great intensity in the period from October to April (March ?20.9). The minimum in the eastern air-flow can be observed in summer (July +0.7). Another characteristic feature for Spitsbergen is predomination of the cyclonic patterns (index C = 56 for a year), especially in the period from September to March (November 12.8). In May the index C is negative (-9.4), which confirms the great activity of anticyclonic pattern. Among the southerly circulation forms the northern component dominates (index S = -36 for a year). Only in July and August the opposite situation can be observed. Circulation forms over Spitsbergen have been fluctuated in the long-term period. In 1951-2000 the greatest changes have been observed in the indices C and W (fig. 3-7). Significant increasing trend was observed in annual values of C and S indices. Southerly circulation index S is well connected with North Atlantic Oscillation (NAO) index (table 6). The best correlation between the mean temperature at Hornsund and circulation indices exists for the S index (table 7).
Źródło:
Problemy Klimatologii Polarnej; 2001, 11; 7-26
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative chemical characteristics of precipitation in the Hornsund region (SW Spitsbergen) in the years 1993-1994 and 1998-1999
Autorzy:
Burzyk, Maciej
Burzyk, Jerzy
Głowacki, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2052394.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
Hornsund
precipitation
atmospheric circulation
Źródło:
Polish Polar Research; 2001, 22, 3-4; 233-247
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temporal and spatial variability of thermal and humidity stimuli in the Hornsund area (Svalbard)
Autorzy:
Araźny, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2041896.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
biometeorology
climate change
atmospheric circulation
Źródło:
Polish Polar Research; 2019, 40, 1; 29-53
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meteorological and biometeorological conditions in the Hornsund area (Spitsbergen) during the warm season
Autorzy:
Araźny, Andrzej
Migała, Krzysztof
Sikora, Sebastian
Budzik, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2051598.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
South Spitsbergen
meteorology
biometeorology
atmospheric circulation
Źródło:
Polish Polar Research; 2010, 3; 217-238
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Occurrence of Fog at Meteorological Stations Located on the Airport in Poland in the Years 2005-2015
Autorzy:
Skomorowski, A.
Piotrowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/163725.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwa Geofizyczne
Tematy:
fog
atmospheric circulation
horizontal visibility
frequency of fog
Opis:
Evaluating synoptic conditions and the incidence of fog cases as well as number of days with fog across a large spatial spectrum such as atmospheric circulation and comparing results to local scale analyzes will help to accurately identify conditions conductive to formation of fogs on the territory of Poland. The aim of the study is to analyze the time of fog formation during the day, fog duration, and the extent of limitation of the horizontal visibility. Data coded in METAR (Meteorological Aerodrome Report) messages was used to perform the analysis of synoptic from 8 stations located at the largest airports in Poland. In the analysis, the main criterion was the number of cases when horizontal visibility limited below 1 km – number of fogs. Results show that there is a clear, seasonal pattern of fog frequency for all stations in this study. For a majority of stations, the minimum number of fogs occurred during the summer months and the maximum number of fogs was observed in October and November. The probability of fogs in the cold half of the year, during the anticyclonic circulation, is slightly higher than during cyclonic circulation and is connected with meridional air advection. In the warm half of the year the probability of fogs during cyclonic circulation increases. Fog duration in most cases did not exceed 3 hours for all stations. At the stations analyzed, fog most often limits the horizontal visibility to 500 m, but there are seasonal differences in the frequency for separated ranges of horizontal visibility.
Źródło:
Przegląd Geofizyczny; 2018, 4; 315-327
0033-2135
Pojawia się w:
Przegląd Geofizyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ cyrkulacji atmosfery na wysokie opady w Hornsundzie (Spitsbergen)
Influence of atmospheric circulation on the high precipitation in Hornsund (Spitsberegen)
Autorzy:
Niedźwiedź, T.
Powiązania:
https://bibliotekanauki.pl/articles/260911.pdf
Data publikacji:
2002
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
cyrkulacja atmosfery
opady atmosferyczne
Spitsbergen
atmospheric circulation
precipitation
Opis:
Maximum daily precipitation and the number of days with precipitation 10.0 mm was analysed in Polish Polar Station in Hornsund (Spitsbergen), based on the measurements during 8008 days in the period 1978 June - 2000 July. The geographical coordinates of the station are following: j = 77°00? N, l = 15°33? E, Hs = 11 m a.s.l. This region is characterised by relatively large annual precipitation, varied from 230 mm in 1987 up to 640 mm in 1996. The largest diurnal total of precipitation - 58.3 mm was observed on August 1, 1994. The second high value 52.6 mm was noticed on September 6, 1996. During the observed period only 5 times daily precipitation exceeded 40 mm and 14 time was higher than 30 mm. Return period for possible daily precipitation greater than 70 mm is less than once in a hundred years. In the annual course the maximum of precipitation was observed mainly in August and September. Also the largest precipitation appears most often during the advection of air from the South and South-West with cyclones coming from the Atlantic Ocean. Special attention was made to the daily precipitation >=10 mm. they occurred during the 201 days (2.5%) and bringing about 35% of annual total. The probability of such events is highest in autumn (25%) during the south westerly cyclonic circulation type (SWc). Two other circulation types are caused also such precipitation: southern cyclonic type (Sc) with probability 24% and south westerly anticyclonic ones (SWa), with probability 11.5%. During the last decade of 20th century there was observed the increasing tendency in frequency of large precipitation in Hornsund. The sudden increase take place since 1994. These changes were connected with greater frequency in the intensity of westerly and southerly atmospheric circulation expressed by the zonal and meridional circulation indices.
Źródło:
Problemy Klimatologii Polarnej; 2002, 12; 65-75
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Warm winter and cold summer spells in Spitsbergen and their circulation conditions
Autorzy:
Tomczyk, Arkadiusz M.
Łupikasza, Ewa B.
Kendzierski, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/2041846.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Svalbard
thermal spells
climate change
atmospheric circulation
Źródło:
Polish Polar Research; 2019, 40, 4; 339-359
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przebieg roczny ciśnienia atmosferycznego na Antarktydzie
Annual course of the atmospheric pressure on the Antarctic
Autorzy:
Kejna, M.
Powiązania:
https://bibliotekanauki.pl/articles/260645.pdf
Data publikacji:
2005
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
ciśnienie atmosferyczne
Antarktyda
cyrkulacja atmosferyczna
Antarctic
atmospheric pressure
atmospheric circulation
Opis:
W artykule przedstawiono zmienność przestrzenną przebiegu rocznego ciśnienia atmosferycznego na Antarktydzie. Stwierdzono dwa typy przebiegów rocznych ciśnienia. Na wybrzeżu występuje przebieg charaktery-zujący się półroczną oscylacją, z maksymalnymi wartościami w sezonie letnim i zimowym oraz najniższymi w przejścio-wych porach roku. We wnętrzu kontynentu najwyższe ciśnienie występuje latem, a najniższe w chłodnej połowie roku. Największe amplitudy roczne ciśnienia występują we wnętrzu kontynentu. W ostatnich dwóch dekadach XX wieku zaznaczyły się istotne zmiany w przebiegu rocznym ciśnienia atmosferycznego.
At the polar latitudes of the Southern Hemisphere a circulation cell functions which is connected with the strong baric wedge feature of the atmosphere occurring between the Antarctic anticyclone and a very deep circumpolar trough by the Antarctic coastline. The circulation system in the Antarctic region shows seasonal variability called Southern Annular Mode (SAM). In the cold season the tropospheric exchange of air masses strengthens due to the increase of the katabatic winds? speed. The relocation of air masses from over Antarctica to its peripheries has an influence on the annual course of the atmospheric pressure. In the elaboration mean monthly air pressure values were taken into account from 106 Antarctic stations from the beginning of measurements to 2000. On the basis of these data the mean annual course of the atmospheric pressure has been counted as well as the yearly pressure range. Annual courses from two periods: 1958-1980 and 1981-2000 were also compared. Over the Antarctic the annual course of the atmospheric pressure is complex. At the costal part of the continent there are two maxima (in summer and in winter) and two minima in the transient seasons. This course is called semi-annual oscillation (SAO) in the literature. However this phenomenon shows certain regional specifics. On the Antarctic Peninsula and South Orkney Islands the winter maximum is more distinct, while minima are shifted to February and November. In the inland the winter maximum decreases with the distance from the coast and at stations situated in the highest parts of the glacial plateau the highest pressure values occur in summer and distinctly lower ones in winter. At some inland stations a slight increase of the pressure can be observed in the middle of winter what refers to the thermal coreless winters occurring frequently in this region. The annual range of the atmospheric pressure decreases from the coast (15-7 hPa) to the interior of the continent, where it reaches values above 20 hPa. During the last two decades of the 20th century significant changes took place in the annual courses of the pressure in comparison to the years 1958-1980. On the South Orkney Islands and the Antarctic Peninsula the pressure increased in summer and in autumn, while in winter distinctly decreased. At the remaining part of the Antarctic coast pressure decrease occurred in every seasons, and in the Weddell Sea region the autumn and spring minimum significantly deepened. At the majority of the stations the annual amplitudes of the atmospheric pressure decreased after 1980. These changes contributed to the disturbances in the functioning of the Antarctic climate system. On the Antarctic Peninsula the air temperature increased, while at many stations in the Eastern Antarctic considerable cooling occurred.
Źródło:
Problemy Klimatologii Polarnej; 2005, 15; 7-16
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 90

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