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Tytuł:
Cyrkulacja wody w Jeziorze Paklickim Wielkim
Circulation of waters in Paklickie Wielkie Lake
Autorzy:
Woś, D.
Powiązania:
https://bibliotekanauki.pl/articles/2095977.pdf
Data publikacji:
1979
Wydawca:
Poznańskie Towarzystwo Przyjaciół Nauk
Źródło:
Badania Fizjograficzne nad Polską Zachodnią. Seria A:Geografia Fizyczna; 1979, 32; 191-200
0067-2807
Pojawia się w:
Badania Fizjograficzne nad Polską Zachodnią. Seria A:Geografia Fizyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zależność miejskiej wyspy ciepła od cyrkulacji atmosferycznej
Urban heat island in dependence of atmospheric circulation types
Autorzy:
Wawer, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/945181.pdf
Data publikacji:
1998
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
miejska wyspa ciepła
cyrkulacja atmosferyczna
urban heat island
Opis:
The urban heat island (UHI) is very frequent in Warsaw and may exist during every types of atmospheric circulation. The UHI is more frequent during anticyclonic types than during cyclonic ones. Especially intensive UHI is in the anticyclonic types: NE, W and E-SE.
Miejska wyspa ciepła w Warszawie występuje bardzo często i może tworzyć się przy każdym typie cyrkulacji atmosferycznej. Powstaje ona częściej w sytuacjach antycyklonalnych niż w cyklonalnych, a jej największą intensywność można obserwować przy typach: NE, W i SE.
Źródło:
Acta Universitatis Lodziensis. Folia Geographica Physica; 1999, 3
1427-9711
2353-6063
Pojawia się w:
Acta Universitatis Lodziensis. Folia Geographica Physica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rola cyrkulacji atmosferycznej w kształtowaniu stopnia czystości powietrza napływającego nad aglomeracje miejsko-przemysłowe (na przykładzie Łodzi)
The impact of air circulation on purity of the air flowing over urban and industrial agglomeration (a study case of Łódź)
Autorzy:
Skrzypski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/945195.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Łódź
cyrkulacja atmosferyczna
Opis:
Zanalizowano zmiany poziomu zanieczyszczenia pyłem zawieszonym i SOz mas powietrznych napływających nad zachodnie i wschodnie peryferie Łodzi. Stwierdzono wyraźne zmniejszenie tego poziomu, a także jego zaJeźność od typu cyrkulacji atmosferycznej. Wykazano, że obserwowana w miastach Polski poprawa sytuacji aerosanitarnej wynika z uwarunkowań zewnętrznych. Wykazano również wpływ zmian frekwencji poszczególnych typów cyrkulacji (wpływ okresowości procesów cyrkulacyjnych) na zanieczyszczenie powietrza w aglomeracjach miejsko-przemysłowych.
Changes in dust and S02 concentration in the air masses flowing onto western and eastern suburbs of Łódź are analyzed. A significant decrease in these values was observed and dependence of the concentration on the type of air circulation was found. It was shown that improvement in the aero-sanitary conditions was caused by external factors. It was also shown that changes in the frequency of particular circulation types had influence on the air pollution in urban and industrial agglomerations.
Źródło:
Acta Universitatis Lodziensis. Folia Geographica Physica; 1999, 3
1427-9711
2353-6063
Pojawia się w:
Acta Universitatis Lodziensis. Folia Geographica Physica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cechy zmienności opadów w cyklu rocznym na obszarze Svalbardu
Features of the precipitation changesover the Svalbard in the annual cycle
Autorzy:
Łupikasza, E.
Powiązania:
https://bibliotekanauki.pl/articles/260792.pdf
Data publikacji:
2000
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
opady atmosferyczne
Svalbard
zmienność opadów
cyrkulacja atmosferyczna
Opis:
This article discusses the changes in an annual cycle of precipitation observed over many years in the Svalbard area. Monthly precipitation sums recorded at the Isfjord Radio station, Björnöya, Jan Mayen were used to accomplish the analysis. Data presented come from GHCN (Vose et al. 1997), MCDW (1957-1997) and WWR (1929,1944,1947,1959,1968,1979,1981, 1987, 1994, 19(5). The characteristics of the annual precipitation were described using Wilgat's indicator of periodicity of precipitation ( 1949) and Vemic's pluviometric coefficient (Szreffel 1961). Apart from that the amount of the highest and the lowest occurrence of precipitation in each month was calculated during the 10-years moving periods. In addition the annual change of the monthly sums of precipitation was characterised. The analysis of the annual change of the periodicity indicator has proved that during the examined period the precipitation regime on Isfjord Radio station and Jan Mayen do not show clear changes. On Björnöya station from the mid forties periodicity of precipitation has decreased. On all examined stations until the late thirties the value of the pluviometric coefficient were less than 50%. Since the mid forties over half of the amount of precipitation occurred from March to November. The highest sums of precipitation most often occurred in April, May and June. The highest sums of precipitation on Jan Mayen station and Björnöya station occurred mainly in September and October. On Isford Radio station the highest sums of precipitation were recorded chiefly in March. September. February and August.
Źródło:
Problemy Klimatologii Polarnej; 2000, 10; 41-54
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Opady całkowite i stałe w Arktyce Kanadyjskiej i ich zmienność w okresie 1950-1995
Total and solid precipitation in the Canadian Arctic and their variability from 1950 to 1995
Autorzy:
Przybylak, R.
Powiązania:
https://bibliotekanauki.pl/articles/261021.pdf
Data publikacji:
2000
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
opady atmosferyczne
Arktyka
cyrkulacja atmosferyczna
Opis:
The main aims of this paper are i) to establish the trends in solid and total precipitation as well as in solid to total precipitation ratio (hereinafter SIC ratio) in the Canadian Arctic in recent decades. and ii) to investigate the influence of air temperature and circulation factors (atmospheric and oceanic) on the above-mentioned precipitation characteristics, Recently updated and adjusted data (see Mekis and Hogg 1999) from 16 stations located in the Canadian Arctic (fig. I) were used for the investigation. The southern boundary of the study area was taken after Atlas Arktiki (1985). In addition, the data from two sub-Arctic stations were also used. The majority of the data cover the period from 1950 to 1995. The relationship between air temperature and precipitation in the Canadian Arctic was investigated using i) the sets of 10 individual warmest and 10 individual coldest years chosen from the areally averaged annual Canadian Arctic temperature series, ii) the warmest and coldest l C-year blocks from the same Canadian Arctic series, and iii) the sets of years defined in points i) and ii) but chosen from the individual station temperature series. Next, in the case of the two first approaches, for each station the differences of solid and total precipitation as well as the S/C ratio were calculated between sets of warmest and coldest years. In the third approach, the differences were only computed for the station which was the basis for choosing the warmest and coldest years. The same method was used to investigate the relationships between circulation factors and precipitation in the Canadian Arctic. The precipitation and the SIC ratio differences were calculated here between the sets of years with high and low values of the best known indices (North Atlantic Oscillation (NAO) and Southern Oscillation) characterizing atmospheric circulation or, in the case of the oceanic circulation, between the years with the opposite Arctic Ocean circulation regimes (cyclonic and anticyclonic, see e.g. Proshutinsky and Johnson 1997). The main results of the investigation were as follows: The corrected annual precipitation sums (after the influence of measured errors are deleted ) arc higher than uncorrected values by 26% to 58% depending on the analyzing station (see tab. 2). A statistically significant increase in all kinds of areally averaged seasonal and annual precipitation for the Canadian Arctic occurred over the period 1950 1995 (figs :2 and 3). On the other hand, the S/C ratio did not change significantly, except for summer values (fig. 5) and its behavior was also in accord with small variations noted in air temperature (fig. 4). Solid precipitation occurs usually in all seasons , but the S/C ratio maximum was observed in winter (98.7%) and the minimum in summer (12.5%). The areally averaged annual S/C ratio was 57,3%. An increase in air temperature in the Canadian Arctic most often led to the rise of all kinds of annual precipitation sums, but only when the warmest and coldest years were chosen based on the individual stations. The pattern of the relationship is significantly more complicated and can be even opposite to that presented above, when the sets of the warmest and coldest years are chosen based on the areally averaged annual temperature for the Canadian Arctic (see fig. 6). Significantly more stable results of changes occurred for the S/C ratio, which in warmer periods was usually lower (fig. 7). However, more detailed and reliable investigations of temperature-precipitation relations conducted for individual stations showed that the last statement is true, but only for the southern (warmer) part of the Canadian Arctic (<70°N). During the periods with high positive values of the NAO, a decrease in precipitation is observed in the south-eastern part of the Canadian Arctic (fig. 8), that is, in the area where a strong cooling was also observed (see fig. 12 in Przybylak 2000). During the El Niño events most of the Canadian Arctic had both greater precipitation and a higher SIC ratio than during the La Niña events (fig. 9). The most univocal results of precipitation and SC ratio changes were connected with changes of the Arctic Ocean circulation regimes. In almost the whole study area, a lower precipitation and a SC ratio was noted during the anticyclonic circulation regime in the Arctic Ocean (fig. 11).
Źródło:
Problemy Klimatologii Polarnej; 2000, 10; 13-40
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metamorfoza pokrywy śnieżnej w rejonie południowego Spitsbergenu w sezonie 1992/1993
Metamorphosis of the snow cover in South Spitsbergen in the season 1992-1993
Autorzy:
Leszkiewicz, J.
Głowacki, P.
Powiązania:
https://bibliotekanauki.pl/articles/260967.pdf
Data publikacji:
2001
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
lodowce
badania śniegu
pokrywa śnieżna
Spitsbergen
cyrkulacja atmosfery
glacier
snow cover
snow research
atmospheric circulation
Opis:
Winter snow cover in south Spitsbergen is modelled by three main factors: snow precipitation, strong winds which blow out large amounts of snow (locally snow deposition occurs) and winter thaws of short duration. Slight snow melting during thaws causes development of ice-crust layers in a frozen snow cover. The ice-crust protects snow cover from blowing out. Moreover, ice-crust layers are very important in the investigations of snow stratigraphy. In the winter snow cover of 1992/1993, eight layers of ice-crust were observed. The occurrence of atmospheric precipitation is highly associated with the type of atmospheric circulation in the area of south Spitsbergen. In the analysis of statistic relations between circulation and precipitation, circulation typology of Niedźwiedź (1997) was applied. In the period June 1992 - May 1993, as many as 74% of annual solid precipitation was associated with the occurrence of three types of circulation (C-10, C-8 and C-3). The circulations C-4, C-6 and C-1 gave only 4% of annual precipitation. The winter season 1992/1993 is connected with typical meteorological conditions that occur in the south part of Spitsbergen. In the area of Polish Polar Station, four phases of development and degradation of snow cover were distinguished: - intensive blowing out of snow (October - January), - small increase of snow cover thickness (February - March), - considerable increase of snow cover thickness (March - May), - thaws (May, 25th - June, 28th). The thickness of snow cover depended on the altitude and local conditions. Considerable differences were determined in snow thickness at two sites located in small distance from each other (500 m), both close to the seacoast (Fig. 1). Water equivalent of the snow cover at Polish Polar Station (8 m a.s.l.) at the end of winter was only 150 mm, whereas at Fugle site (5 m a.s.l.) it was 2.5 times higher (378 mm). These values were much higher on the glaciers; Hans Glacier in the ELA zone (300 m a.s.l.) - 276 mm and in the accumulation zone (450 m a.s.l.) - 1459 mm; Amundsenisen Plateau (700 m a.s.l.) - 1293 mm.
Źródło:
Problemy Klimatologii Polarnej; 2001, 11; 41-54
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Warunki meteorologiczne na Lodowcu Waldemara (NW Spitsbergen) w sezonie letnim 1999 roku
Meteorological conditions on the Waldemar Glacier (NW Spitsbergen) in summer season 1999
Autorzy:
Kejna, M.
Powiązania:
https://bibliotekanauki.pl/articles/260965.pdf
Data publikacji:
2001
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Lodowiec Waldemara
Spitsbergen
cyrkulacja atmosfery
Waldemar Glacier
atmospheric circulation
Opis:
The meteorological measurements were carried out on NW Spitsbergen on the Waldemar Glacier (surface 2.66 km2) in three points: ATA (133 m a.s.l., marginal zone), LW1 (130 m a.s.l., snout of glacier), LW2 (380 m a.s.l., firn part). The base station of Toruń Polar Expedition is situated on the north part of Kaffioyra (KH, 11 m a.s.l.), about 3 km away from glacier. The air temperature and relative air humidity were measured by termohigrographs in standard meteorological boxes, and precipitation by Hellmanns pluwiometer in the period 14.07-8.09.1999. The weather conditions on the Kaffiöyra region are determined by solar and circulation factors. In the summer season 1999 north and east advection of air masses dominated. The meteorological conditions on Waldemar Glacier are formed by the influence of two contrasting environments: the glacier and its moraine foreground. The mean air temperature in summer 1999 at the Kaffiöyra equaled 5.4°C and at the moraine of the Waldemar Glacier (ATA) 5.2°C. On the glacier the air temperature was much lower, and on the snout (LW1) was 4.5°C and decreases with the altitude (LW2 3.2°C) . The average gradient of air temperature between LW1 and LW2 stands was 0.53°C/100 m. Between the warmed up dark moraine ground (ATA) and the melted surface of the glacier a ?thermal jump? occurred (0.4°C on the distance 160 m). The highest maximum of air temperature at KH was 18.1°C, and on the Waldemar Glacier 16.4°C (LW1) and 16.5°C (LW2). The relative air humidity on Spitsbergen are formed under the influence of oceanic water and foehn phenomena. In summer season 1999 the mean relative air humidity was 84% at the Kaffioyra and increased with the altitude on the Waldemar Glacier (LW1 ? 86%, LW2 ?89%). In the period 21-07-31.08 at the Kaffioyra sums of the precipitation equaled 58.4 mm and on the glacier: 85.2 mm (133 m a.s.l.), 100,6 mm (233 m a.s.l.), 108.9 mm (380 m a.s.l.) and 131.8 mm (421 m a.s.l.). In summer season the meteorological conditions on the Waldemar Glacier show a large variability. It is a result of incoming air masses, warm from moraine foreground up the glacier and cool from the glacier plateau, from the interior of Spitsbergen.
Źródło:
Problemy Klimatologii Polarnej; 2001, 11; 55-65
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany zlodzenia mórz Grenlandzkiego i Barentsa w świetle zmian wskaźnika intensywności Prądu Labradorskiego (1972-1994). Wstępne wyniki analizy
Changes in sea ice cover of the Barents and Greenland seas in the light of changes of the Labrador Current intensity index (1973-1994). Preliminary result of analysis
Autorzy:
Styszyńska, A.
Powiązania:
https://bibliotekanauki.pl/articles/260876.pdf
Data publikacji:
2001
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
pokrywa lodowa
cyrkulacja atmosfery
Prąd Labradorski
Morze Grenlandzkie
Morze Barentsa
ice cover
atmospheric circulation
Labrador Current
Greenland sea
Barents Sea
Opis:
The Barents and Greenland seas are characterised by great seasonal and interannual changeability in the ice cover. Research carried out by many authors prove that the ice regime of these seas is influenced, to a great extent, by large scalę changes in atmospheric circulation and by the ocean surface circulation of the North Atlantic and the Arctic Ocean. Such correlations arę mainly of teleconnection type and show phase shifts (among others Mysak 1995, Deser et. al. 2000). One of the elements of the sea surface circulation of the Atlantic Ocean is the Labrador Current. The intensity of this current changes in time. In the periods when the Labrador Current becomes strong, its waters form vast anomalies in the sea surface temperaturę in the NW Atlantic. Further they spread eastwards along the north edge of the North Atlantic Current and with some delay, have influence on the atmospheric circulation in the central and east part of the North Atlantic (Marsz 1997, 1999). The way how the changes in the intensity of the Labrador Current influence the climate nas not been discovered yet. The intensity of this current can be defined by means of an index (WPL - Labrador Current Intensity lndex) established by Marsz (Internet). This work examines if there is direct correlatton between the changes in the sea-ice cover of the Barents and Greenland seas and the variability of the intensity index of the Labrador Current. The research madę use of homogenous data concerning a week-old sea ice cover observed at the analysed seas and the values of intensity index of the Labrador Current in the period January 1972 until December 1994 given by Marsz (obtained from NIC and NCDC - Asheville). It has been stated that over the examined 23-year period (1972-1994) the mean monthly the sea-ice cover in the Barents Sea indicates to strong correlation with the changes in the value of the intensity index of the Labrador Current (Table 1, Fig. 1). The changes in WPL result in the rhythm of changes in the sea-ice cover of the Greenland Sea only in winter (Table 2, Fig. 2). The occurrence of anomalies in the sea surface temperatures in the region SE of New Foundland seem to have great influence on the later formation (after few or several months) of the sea-ice cover in the Barents Sea (Fig. 1, 3. 4, formula 1-3). Changes in the intensity of Labrador Current in a given year explain 30% up to 50% changeability of the sea-ice cover developing in that sea from January to July in the following year (Table 1, Fig. 3). The area of the sea-ice cover in the Greenland Sea is mainly influenced by the intensity of the Transpolar Drift and East-Greenland Current transporting considerable amount of ice from the Arctic Ocean. Only during fuli winter season, from January to March, the correlation between the intensity of the Labrador Current and the sea-ice cover reaches statistical significance (Table 2). The results of the carried out analysis point to significant influence of advection factor on the sea-ice cover of the examined seas. In both analysed seas the phenomenon is connected to both the character and intensity of the Atlantic waters flow and to greater frequency of occurrence of specified forms of air circulation in the region of central and eastern part of the North Atlantic, possible at a given distribution of anomalies in surface waters of the North Atlantic.
Źródło:
Problemy Klimatologii Polarnej; 2001, 11; 93-104
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
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:
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:
Zagadnienie odtworzenia wartości bilansu Lodowca Hansa (SW Spitsbergen)
The reconstruction of the mass balance of the Hansbreen (SW Spitsbergen)
Autorzy:
Marsz, A. A.
Styszyńska, A.
Powiązania:
https://bibliotekanauki.pl/articles/260915.pdf
Data publikacji:
2002
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Spitsbergen
cyrkulacja atmosfery
Lodowiec Hansa
Hansbreen
atmospheric circulation
Opis:
This article deals with an attempt to estimate the value of the net balance of Hansbreen (SW Spitsbergen).In order to estimate thes value an assumption has been made that the value of the net balance of Hansbreen is a function of two groups of factors, i.e. static and dynamic ones. The static elements (georgaphical location of Hansbreen, topography of the glacier and its surroundings, etc.) have no influence on the elements of the interannual changeability of the balance; a constant value will represent these elements in formulae. A group of dynamic factors that introduces an interannual changeability to the net balance is made up of a set of meteorological factors (mainly the course of air temperature, precipitation and cloudiness). The said meteorological factors are influenced by the character of atmospheric circulation. Because the main features of the character of the interannual changeability of the air circulation over that area are influenced by the spatial distribution of the anomalies sea surface temperature (SST), the analysis of variances has been chosen as the method used to define the direct statistical estimation of winter and summer balances as the function of monthly anomalies in SST occurring in the North Atlantic in a preceding period. As a result of statistical analysis, two linear functions of great statistical significance have been obtained, i.e. formula [1] and [2] enabling the estimation of winter and summer balances respectively. These functions use the values of anomalies in SST as independent variables. The influence of these values on the course of changeability in atmospheric circulation over the Nordic seas is obvious. The calculated values of the net balance of Hansbreen, estimated by means of the above mentioned functions and the values observed (Fig. 4) proved to be almost the same. Having the values of anomalies in SST (Reynolds data set) a sequence of values of net balance of Hansbreen has been estimated for the period 1970/71÷1996/97 (Table 2, Fig. 5) with the help of this method. An error of values calculated in this way can be found within limits ą0.106 m. water equivalent. The values of the calculated net balance taken from the above mentioned period were used to find by means of best estimating correlation between Hansbreen net balance and temperature and precipitation sums at Isfjord Radio station. Thanks to these results, the next sequence of values of Hansbreen balance for period 1926/27÷1969/70 (Table 3, Fig. 6) has been calculated. The final values are of no statistical significance and contain unknown errors. If they are close to reality it might mean that the balance of Hansbreen has been permanently negative since the end of the 20-ties.
Źródło:
Problemy Klimatologii Polarnej; 2002, 12; 117-131
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura bilansu promieniowania słonecznego na obszarze Lodowca Avatsmarka w dniach 13 IV - 04 V 2002 r.
Structure of solar radiation balance on Avatsmark Glacier in the period of 13 IV - 4 V 2002
Autorzy:
Budzik, T.
Powiązania:
https://bibliotekanauki.pl/articles/260822.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Spitsbergen
promieniowanie słoneczne
cyrkulacja atmosferyczna
solar radiation
atmospheric circulation
Opis:
It was carried out an analysis of solar radiation balance for a chosen active surface (glacier). The basis was meteorological data, which was recorded by an automatic weather station in the period of 13.04.2002 - 04.05.2002 in the area of Aavatsmark glacier (NW Spitsbergen). The individual radiation fluxes were analysed and balances and also diurnal sums were calculated on the basis of them. It was set the individual values of radiation balance against chosen meteorological parameters. These results were compared with the data from the nearby weather station in Ny-Alesund.
Źródło:
Problemy Klimatologii Polarnej; 2003, 13; 151-160
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Współczesna zmienność cyrkulacji atmosfery, temperatury powietrza i opadów atmosferycznych na Spitsbergenie
Contemporary variability of atmospheric circulation, temperature and precipitation in Spitsbergen
Autorzy:
Niedźwiedź, T.
Powiązania:
https://bibliotekanauki.pl/articles/260947.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
cyrkulacja atmosfery
temperatury powietrza
opady atmosferyczne
Spitsbergen
atmospheric circulation
air temperature
precipitation
Opis:
The study presents variability of simple circulation indices above Spitsbergen for the period 1951-2002, based on original calendar of synoptic divided from the synoptic maps. After calculation of synoptic types frequencies the further results have been obtained using the simple circulation indices: W - westerly, zonal index, S - southerly - meridional index, C - cyclonicity index, as proposed by R. Murray and R. Lewis (1966) with some modifications. The negative value of W index is typical for Spitsbergen, according to great frequency of eastern airflow. Some complicated relations between above indices, NAO, temperature and precipitation were noticed in Spitsbergen. Variability of temperature and precipitation based on the data from Isfjord Radio and Svalbard Lufthavn stations, as well as from Polish Polar Station in Hornsund Fiord on SW part of Spitsbergen. They were compared with Bjornoya (Bear Island) - about 300 km SSE from Hornsund. For the temperature the main feature is period of cooling in the years 1961-1971 and around 1988, after the great warming during the decade of 1930th. During that coolest years also large annual temperature range was typical. The coldest was year 1968, and the warmest one -1984 (from -2 to -3°C). Next warm years were observed in 1990 and 1999, but in Jan Mayen the warmest was year 2002. The coolest winter (December-February) with average temperature below -20°C in Longyearbyen was in 1962/1963 (-21.5°C) and 1988/1989 (-20.1°C), and the warmest one on 1984/1985 (-8.3°C). Significant warming was noticed only in the warm half-year (V-X) about 1.2K since 1972 up to 2002. The warmest period V-X was in 1990, and coolest - in 1968. In summer (June-August) the temperature varied between 2°C in 1982 and 4.5°C (Hornsund) or 6.1°C (Longyearbyen) in 2002 (the warmest summer). Temperature changes in Spitsbergen depend on a great extend of circulation factors, mainly from the southern (S) and zonal circulation indices (W). The lowest temperatures were observed round the 1965. During the last decade of 1980 the period of little warming is observed again. For precipitation relative large increase of summer and September precipitation were noticed in the last years of the 20th century, mainly in 1994-1997. May be the part of its fallen in the form of snow in the upper parts of archipelago and supplied glaciers. The highest precipitation is typical for August and September. The largest diurnal precipitation totals - 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 since 1978, only 5 time the daily precipitation in Hornsund exceeded 40 mm and 14 time were higher than 30 mm. In Hornsund annual total of precipitation twice exceeded 600 mm, in 1994 and 1996. This increase of precipitation was connected with greater frequency in the intensity of westerly and southerly atmospheric circulation expressed by the zonal and meridional circulation indices and the more intense cyclonic activity in autumn and winter seasons
Źródło:
Problemy Klimatologii Polarnej; 2003, 13; 79-92
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Związek akumulacji śniegu na lodowcach północno-zachodniego Spitsbergenu z cyrkulacją atmosferyczną, opadami i temperaturą powietrza w okresach zimowych
Relation between the snow accumulation on glaciers of North-West Spitsbergen and the atmospheric circulation, precipitation and air temperature in the winter seasons
Autorzy:
Grabiec, M.
Powiązania:
https://bibliotekanauki.pl/articles/260836.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Spitsbergen
akumulacja śniegu
cyrkulacja atmosferyczna
opady
temperatury powietrza
snow accumulation
atmospheric circulation
precipitation
air temperature
Opis:
This work attempts to determine connections between glaciers' winter mass balance and meteorological factors of winter seasons. Detailed analysis was carried out between the snow accumulation of Austre Broggerbreen and the meteorological data from Ny-Alesund station (Kongsfjord region) from 1975 to 1998. Relation has been found between the snow accumulation and warm and humid air masses frequency in winter seasons (X - V). Those masses are mainly from southerly and southwesterly directions for Svalbard. The winter mass balance shows very clear connection with air temperature and precipitation factors of winter seasons (sum of winter precipitation, number of days with precipitation intensity >= 5 mm per day, winter mean air temperature, and number of days with maximum daily air temperature >= 0°C). A particularly close connection is observed between winter mass balance and number of days with precipitation intensity >= 5 mm per day at the positive daily maximum air temperature (LPTmax) (r = 0.81) - Fig. 8. The winter mass balance multiply regression (Wb) was worked with the use of the elementary meteorological factors: the average winter temperature (T) and the sum of precipitation in the same period (P). On the basis of the multiply regression of winter balance it is possible to predict snow accumulation changes. Over the next 50 years the winter snow accumulation of Austre Broggerbreen could increase about 15% if the scenario of climatic changes by Hanssen-Bauer (2002b) is used. If, in addition, one assumes the stability of ablation, the mass balance of glaciers will rise by 24%, but the mass balance will still be negative.
Źródło:
Problemy Klimatologii Polarnej; 2003, 13; 161-171
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Amplituda dobowa temperatury powietrza na Antarktydzie
Diurnal air temperature range on the Antarctic
Autorzy:
Kejna, M.
Powiązania:
https://bibliotekanauki.pl/articles/260832.pdf
Data publikacji:
2004
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
temperatury powietrza
Antarktyda
cyrkulacja atmosferyczna
air temperature
Antarctic
atmospheric circulation
Opis:
Diurnal air temperature ranges (DTR) have been counted based on the monthly mean values of the daily maximal and minimal air temperature from 23 Antarctic stations. DTR shows a considerable spatial differentiation on the Antarctic. The lowest DTR values (4-6°C) occur along the western coast of the Antarctic Peninsula and on the subantarctic islands. At the remaining coast of Antarctica the mean DTR vary from 6-7°C to 10°C at the stations situated on higher geographical latitude. In the Antarctic inlands the largest DTR values occur at the highest parts of glacier plateau (8-9°C), while on the South Pole they are distinctly smaller (6°C). In the annual course of DTR the following types have been distinguished: oceanic type at the western coast of the Antarctic Peninsula with small DTR in summer (2-4°C) and twice higher in winter; oceanic-continental type at the coast of Eastern Antarctic with large DTR during the whole year; continental-oceanic type with high DTR in summer and still higher (up to 13°C) in winter occurring at Western Antarctic and in the Weddell Sea basin; continental type characteristic for the interior of the continent with the highest DTR in summer (11-12°C) and smaller in winter; polar type with small DTR in summer (to 3°C) and considerable higher in winter (7-8°C). A decrease of DTR occurred on the Antarctic in regions characterized by increasing temperature in the second half of the 20th century, especially on the western coast of the Antarctic Peninsula, on the coast of Ross Sea and on the Queen Maud Land. The decrease in the DTR values was connected with the quicker increase of daily minimal air temperatures. On the other hand, in the regions where cooling was noted the DTR values increase (inlands of Eastern Antarctic and South Pole, and the Weddell Sea basin), mainly due to the fall in daily minimal air temperatures.
Źródło:
Problemy Klimatologii Polarnej; 2004, 14; 7-18
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 112

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