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    Wyświetlanie 1-12 z 12
    Tytuł:
    Warunki meteorologiczne na równinie Kaffiöyra (NW Spitsbergen) w okresie od 3 VII do 31 VIII 2000 roku
    Meteorological conditions in the Kaffiöyra plain (NW Spitsbergen) from 3rd July to 31st August 2000
    Autorzy:
    Przybylak, R.
    Szczeblewska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/260729.pdf
    Data publikacji:
    2000
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    pomiary meteorologiczne
    Równinia Kaffiöyra
    Spitsbergen
    warunki meteorologiczne
    Opis:
    The paper presents the results of meteorological measurements carried out in the Kaffiöyra Plain in the summer season of 2000 during the 19th Toruń Polar Expedition. Area, range and methodology of measurements were analogical as in the previous expeditions. The bulk of meteorological observations has been done near the Polar Station of N. Copernicus University (φ = 78°41 'N, λ = 11°51'E, h = 11.5 m a.s.1.) located in the northern part of Kaffiöyra (NW Spitsbergen), The standard measurements of all main meteorological elements were carried out four times a day (at 00, 06, 12 and 18 GMT). The best summary of obtained results present tab. 2 and fig. 1. It can be seen from them that generally air temperature oscillated between 2 and 8°C. Minimum temperature in two periods dropped below O°C, while maximum temperature did not exceed 10°C. Precipitation (including trace precipitation) were observed with frequency slightly higher than 50% of days. Most of daily precipitation sums did not exceed 4 mm. Majority of the analysed elements (wind velocity, cloudiness, air temperature, water vapour pressure and precipitation) had higher values in July than in August. In comparison with previous 11 summer seasons, when meteorological measurements were done in Kaffiöyra, summer in 2000 was characterized by: l) the highest frequency of cyclones, 2) the highest/lowest frequency of winds from the northern (NW, NNW and N) and southern (SE, SSE and S) sectors, respectively, 3) below/above normal cloudiness and sunshine duration, respectively, and 4) significantly below long-term mean air temperature and atmospheric precipitation.
    Źródło:
    Problemy Klimatologii Polarnej; 2000, 10; 111-137
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stosunki termiczne i wilgotnościowe w Zatoce Treurenberg i na masywie Olimp (NE Spitsbergen) w okresie od 1.VIII.1899 - 15.VIII.1900
    Thermal and humidity relations in Treurenberg Bay and Massif Olimp (NE Spitsbergen) from 1st August 1899 to 15th August 1900)
    Autorzy:
    Przybylak, R.
    Dzierżawski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/260665.pdf
    Data publikacji:
    2004
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    temperatury powietrza
    wilgotność powietrza
    Spitsbergen
    air temperature
    atmospheric humidity
    Opis:
    The paper describes weather conditions (based on air temperature and humidity) in Treurenberg Bay and Massif Olimp (NE Spitsbergen) for the period from 1st August 1899 to 15th August 1900. The hourly data of the meteorological elements under analysis were collected by the Swedish-Russian scientific expedition, which was sent to Spitsbergen in 1899 to measure an arc of the Earth?s meridian. During the expedition two meteorological stations were established (Fig. 1): the main one (21.9 m a.s.l.) located by the sea in Treurenberg Bay (hereafter 'Treurenberg') and a secondary station (408 m a.s.l.) situated on Massif Olimp (hereafter 'Olimp'). The quality of data were checked and assessed as being very good, especially for the Treurenberg station. The air temperature (T) in Treurenberg in the annual march was highest in August (mean monthly T = 2.1°C) and lowest in March (-27.0°C) (Tab. 2, Fig. 2). Mean yearly T was equal to -9.8°C. The values of T in this part of Spitsbergen are significantly lower than in the western coastal part of the island where, for example, the average annual T for the period 1975-2000 was about twice as high (see Przybylak et al. 2004). On the other hand, mean monthly daily T ranges in Treurenberg are greater (Fig. 3). Day-to-day T changes in the annual cycle were greatest in the cold half-year, and lowest in summer (Fig. 4). These changes are lower here than in the western coastal part of Spitsbergen. Mean monthly daily courses of T are clearest from April to September, showing maximum T in the afternoon, and minimum in the early morning hours (Fig. 5). From October to March (but especially during the polar night) the average daily courses were smooth. Air humidity in Treurenberg was characterized using three commonly used variables: water vapor pressure, relative humidity, and saturation deficit. Due to very low T and quite a large thermic continentality of the climate in NE Spitsbergen, water vapor pressure in Treurenberg is lower than in the western coastal part of Spitsbergen. The highest values in Treurenberg occurred in summer (on average about 6 hPa) and the lowest in late winter (below 1 hPa) (Tab. 2, Fig. 6). Generally, similar relations in the annual march are also seen for two other air humidity variables (see Tab. 2, Fig. 6). The annual cycles of day-to-day changes of all humidity variables in Treurenberg are not clear, as they consist of many maximums and minimums (Fig. 7). These changes are lower here than in other parts of Spitsbergen (see Table 15 in Przybylak 1992a). Mean daily courses of relative humidity are smooth for most months. Only in April and in the period from June to September do we see normal daily cycles with lowest values in 'day' hours and highest values in 'night' hours (Fig. 9). The annual course of T in the Olimp station is similar to that occurring in Treurenberg (Figs. 2 and 10). Of course, the upper station was colder, but only by 1oC for mean annual values (Fig. 11). The drop of T in the Treurenberg region - a drop that is lower than is normally observed in the atmosphere (0.6oC/100 m) - was probably caused by measurement errors (the thermograph at the Olimp station was wrapped in thin material in order to stop the snow accumulating around the metallic sensor). Only limited air humidity data were gathered for the Olimp station due to measurement problems of this element in cold half-year. Therefore, most observations were made only in summer, and they show that the relative humidity was in most cases greater here than at the Treurenberg station. The investigation shows that weather conditions in the NE part of Spitsbergen differ significantly from those observed in the western coastal part of the island. Both T and air humidity are significantly lower in the study area, and these differences in the case of T are especially large in winter.
    Źródło:
    Problemy Klimatologii Polarnej; 2004, 14; 133-147
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie warunków klimatycznych i bioklimatycznych północnej części Ziemi Oscara II z innymi obszarami zachodniego wybrzeża Spitsbergenu w okresie 1875-2000
    Comparison of climatic and bioklimatic conditions in the northern part of Oscar II Land with other areas of the west coast of Spitsbergen from 1975-2000
    Autorzy:
    Przybylak, R.
    Araźny, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/260858.pdf
    Data publikacji:
    2005
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    Spitsbergen
    klimat
    bioklimat
    odczucia cieplne
    climate
    bioclimate
    thermal state
    Opis:
    W artykule porównano warunki klimatyczne i bioklimatyczne N części Ziemi Oskara II z innymi obszarami zachodniego wybrzeża Spitsbergenu w okresie 1975-2000. Klimat Ziemi Oskara II przedstawiono na podstawie danych meteorologicznych ze stacji Ny Alesund. Klimat centralnej i południowej części zachodniego wybrzeża Spitsbergenu reprezentują odpowiednio stacje: Svalbard-Lufthavn i Hornsund. Dla wymienionych obszarów obliczono i przeanalizowano różnice pomiędzy średnimi miesięcznymi i rocznymi wartościami wybranych elementów meteorologicznych (wiatr, zachmurzenie, temperatura i wilgotność powietrza oraz opady atmosferyczne) i wskaźników biometeorologicznych (niedosyt fizjologiczny, wielkość ochładzająca powietrza, wskaźnik ochładzania wiatrem, temperatura ochładzania wiatrem, przewidywana izolacyjność odzieży).
    The paper describes the climate and bioclimate of the tundra zone in the northern part of Oscar II Land (the area from Jonsfiorden to Kongsfiorden) from 1975 to 2000. A comparison with the climate and bioclimate of other parts of the west coast of Spitsbergen is also presented. For the analysis, meteorological data from three stations (Ny Alesund, Svalbard Lufthavn and Hornsund) were used (Fig. 1). Significant differentiation of climatic conditions on the west coast of Spitsbergen was found (Table 1 and Fig. 2). Wind direction and speed was strongly modified by the local topographic conditions. For this reason, the lowest mean annual wind speed (by 1.2 to 1.7 m/s) of the three analysed stations, was in Ny Alesund. The degree of cloudiness was similar at Ny Alesund and Svalbard Lufthavn, while at Hornsund it was greater by about 6%. Mean annual air temperature at Ny Alesund is slightly higher (by 0.1°C) than at Svalbard Lufthavn and significantly lower (by 1.1°C) than at Hornsund. In the annual course, in comparison with the central part of the west coast, the northern part of Oscar II Land is markedly warmer in winter (on average by 1.0°C) and significantly colder in summer (by 1.0°C). An opposite relationship may be noted when comparison is made with the southern part of Spitsbergen. The greatest values of relative humidity occur in the southern and northern parts of Spitsbergen, while in the central part of the western coast their values are smaller (in particular in summer). Atmospheric precipitation was twice as low in the central part of the western coast of Spitsbergen as it was in its northern and southern parts. Differences in bioclimatic conditions were found on the west coast of Spitsbergen (Table 2, Fig. 3). To establish their characteristics, a number of biometeorological and thermophysiological indices were used. These enabled the estimation of the sensations of heat in humans standing outdoors in this part of Spitsbergen. Analysis of the physiological deficit (D) values on the west coast of Spitsbergen indicate that water evaporation from the human upper respiratory tract during the whole year is high. The cooling power (H) shows significant differences between different parts of western Spitsbergen. The mean number of days per year with thermal comfort for humans oscillated between 11 at Svalbard Lufthavn and 18 at Hornsund to 42 at Ny Alesund. On the other hand, days with cold discomfort were most frequent in central (277) and southern (271) parts of Spitsbergen, while in the northern part they rarely occurred (only 217). The best thermal sensations (described as 'cool') according to the wind chill index (WCI) occur from June to September at all stations, and also in May at Ny Alesund. In the other months conditions described as 'cold' were noted over the entire area. Days with a possibility of frostbite were noted with an annual average frequency of about 10 at Ny Alesund and 25 at Svalbard Lufthavn and Hornsund. The wind chill temperature (WCT) throughout the west coast of Spitsbergen shows the dominance of moderate sensations of cold from November to April. During the summer months (July and August) sensations of 'cold' did not occur. The insulation predicted index (Iclp) was used to estimate the bioclimate of Spitsbergen from the point of view of an individual's need for clothes to obtain thermal comfort. The index was calculated for a standing man and a man who is walking at a speed of 4km/h. Its values for the standing individual oscillated from 4.35 clo at Hornsund to about 4.49 clo at Svalbard Lufthavn. On the other hand, for the walker, clothes would need half the thermal insulation level to obtain thermal comfort.
    Źródło:
    Problemy Klimatologii Polarnej; 2005, 15; 119-131
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie warunków meteorologicznych na zachodnim wybrzeżu Spitsbergenu w sezonie letnim 2005 r.
    Diversification of meteorological conditions on the western coast of Spitsbergen during the summer season of 2005
    Autorzy:
    Przybylak, R.
    Araźny, A.
    Gluza, A.
    Hojan, M.
    Migała, K.
    Sikora, S.
    Siwek, K.
    Zwoliński, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/260889.pdf
    Data publikacji:
    2006
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    warunki meteorologiczne
    sezon letni
    Arktyka
    Spitsbergen
    meteorological conditions
    summer season
    Arctic
    Opis:
    W artykule przedstawiono porównanie warunków meteorologicznych w sezonie letnim 2005 r. na podstawie danych zebranych w trakcie trwania polskich wypraw polarnych do Hornsundu, Calypsobyen, doliny Ebby i Kaffiöyry. Dodatkowo, aby szczegółowiej poznać ich zróżnicowanie na zachodnim wybrzeżu Spitsbergenu skorzystano z dostępnych danych dla 2 norweskich stacji: Ny Alesund i Svalbard Lufthavn. Ze względu na różny czas pracy polskich ekspedycji polarnych do porównania warunków meteorologicznych wybrano wspólny okres 21.07-31.08. Stwierdzono, iż zróżnicowanie przestrzenne większości badanych elementów meteorologicznych na zachodnim wybrzeżu Spitsbergenu latem 2005 r. było znaczące. Na kształtowanie warunków meteorologicznych na badanym obszarze, a więc i na ich zróżnicowanie przestrzenne, w pełni sezonu letniego większy wpływ wywiera stopień kontynentalizmu klimatu niż szerokość geograficzna. Jednak wraz ze zbliżaniem się końca lata polarnego rola wspomnianych czynników się odwraca.
    The paper presents the data concerning the spatial diversification of meteorological conditions occurring on the western coast of Spitsbergen during the summer season of 2005. For the analysis daily data have been used from four Polish stations (Kaffiöyra - KH, Ebby valley - EBB, Calypsobyen - CAL and Hornsund - HOR) and two Norwegian stations (Ny Ĺlesund - NYA, Svalbard Lufthavn - SVA), mainly for the common period of observation (from 21st July to 31st August) (Fig. 1). The Hornsund station was used as a reference station. Differences have been computer for all the analysed meteo-rological variables between stations for every 24-hour period, ten- / eleven-day period, and for the common period of observations as a whole (the meterological variables analysed include air pressure (AP), wind speed (v), cloudiness (C), sunshine duration (SS), maximum daily temperature (Tmax), mean daily temperature (Ti), minimum daily temperature (Tmin), relative humidity (f), and atmospheric precipitation (P)) (Table 1, Fig. 2, Fig. 5). All results proved that the spatial diversification of almost all analysed variables is significant. It is very evident that in the summer the degree of climate continentality has a greater influence on this diversification than the geographical latitude. Local topography plays also important role in the diversification of meteorological variables on the western coast of Spitsbergen. A good example of this influence is presented in Figure 4, showing different kinds of wind roses. It can be seen that winds from different directions dominate in each station. Mean daily courses of some selected meteorological variables (Fig. 3) also show that spatial diversification is varied throughout the day. For example, greater differences are noted during "night" hours for atmospheric pressure and wind speed, while an opposite relation exists for air temperature and relative humidity. Extreme values of analysed meteorological variables during the common period of observation (from 21st July to 31st August 2005) are shown in Table 2. The highest temperature (13.1°C) occurred in Svalbard Lufthavn located in the most continental part of Spitsbergen, while the lowest (0.5°C) was in the Hornsund region, where cyclones bringing thick clouds are very common. Day-to-day variabilities of the majority of the analysed meteorological variables on the west coast of Spitsbergen are quite large (Table 3).
    Źródło:
    Problemy Klimatologii Polarnej; 2006, 16; 125-138
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Warunki meteorologiczne na Równinie Kaffiøyra (NW Spitsbergen) w sezonach letnich w okresie 2012-2014
    Meteorological Conditions on the Kaffiøyra Plain (NW Spitsbergen) in Summer Seasons in the Period 2012-2014
    Autorzy:
    Przybylak, R.
    Ulandowska-Monarcha, P.
    Araźny, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/163786.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwa Geofizyczne
    Tematy:
    Arktyka
    Spitsbergen
    Kaffiøyra
    warunki meteorologiczne
    zmiany sezonowe
    Arctic
    meteorological conditions
    seasonal changes
    Opis:
    W artykule przedstawiono charakterystykę warunków meteorologicznych w północnej części Kaffiøyry (NW Spitsbergen, rys. 1) w sezonach letnich (21 VII – 31 VIII) w okresie 2012-2014 (tab. 1, rys. 2-9). Pomiary i obserwacje meteorologiczne prowadzono w ogródku meteorologicznym zlokalizowanym w pobliżu stacji polarnej UMK na morenie czołowo-bocznej Lodowca Aavatsmarka (φ=78°4’N, λ=11°51’E, h=11,5 m n.p.m.). Wykonywano je 4 razy na dobę, w terminach 00, 06, 12, 18 UTC (01, 07, 13, 19 LMT). W artykule uzyskane wyniki porównano z wieloletnimi wartościami większości elementów meteorologicznych obliczonymi z kilkudziesięciu sezonów letnich, w których zorganizowano Toruńskie Wyprawy Polarne w okresie 1975-2014 (tab. 1). W sezonach letnich 2012-2014 stwierdzono większą prędkość wiatru (5,3 m·s-1 w stosunku do 4,6 m·s-1 w wieloleciu 1975-2014). Przyczyniła się do tego przede wszystkim zwiększona jego prędkość w sezonie letnim 2012 r. (6,1 m·s-1). Świadczy to o wzroście działalności cyklonalnej na obszarze Spitsbergenu. Oprócz wiatru znaczącym zmianom podległy także wszystkie parametry temperatury powietrza (tab. 1). W największym stopniu wzrosła temperatura maksymalna (o 0,8 oC), a w najmniejszym minimalna (tylko o 0.4 oC). Warto też odnotować znaczny wzrost średniej dobowej amplitudy temperatury powietrza, o 0,5 oC. Ociepleniu klimatu w rejonie Kaffiøyry towarzyszy także znaczny wzrost opadów, który w latach 2012-2014 wyniósł nieznacznie powyżej 150% ich wielkości z lat 1975-2014. (tab. 1). Pozostałe elementy wymawiane w artykule nie wykazały większych zmian w porównaniu do danych wieloletnich.
    This article provides the characteristics of meteorological conditions in the north of Kaffiøyra (NW Spitsbergen, Fig. 1) in the summer seasons (21 July – 31 August) of 2012-2014 (Table 1, Figs 2-9). The observations and measurements were carried out at a meteorological site located near the NCU Polar Station on the terminal-lateral moraine of the Aavatsmark Glacier (φ=78°4’N, λ=11°51’E, h=11.5 m a.s.l.). The measurements were taken four times per day at 00:00, 06:00, 12:00 and 18:00 UTC (01:00, 07:00, 13:00 and 19:00 LMT). In this article, the obtained results are compared with multi-annual values of most meteorological elements obtained from a few dozen summer seasons, during which Toruń Polar Expeditions were organised in the years 1975-2014 (Table 1). In the summer seasons of 2012-2014, the observed wind speed was greater than in the years 1975-2014 (5.3 m· s-1 vs. 4.6 m·s-1, respectively). This was mainly due to its increased speed in the summer of 2012 (6.1 m·s-1) and it is also an indication of intensified cyclonic activity in the area of Spitsbergen at the time. Besides the wind, all other parameters of air temperature were also subject to considerable changes (Table 1). The maximum temperature of air increased the most (by 0.8 oC), whereas the change in minimum temperature was the smallest (only by 0.4 oC). A substantial increase in the mean diurnal amplitude of air temperature by 0.5 oC is also noteworthy. The warming of the climate of Kaffiøyra is accompanied by greater precipitation, which in the years 2012-2014 slightly exceeded 150% of its respective amount for 1975-2014 (Table 1). The other meteorological elements analysed in this article do not show any major changes as compared with the long-term data.
    Źródło:
    Przegląd Geofizyczny; 2016, 1-2; 73-92
    0033-2135
    Pojawia się w:
    Przegląd Geofizyczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie opadów atmosferycznych w rejonie Kaffioyry (NW Spitsbergen) w sezonie letnim w latach 1980-2008
    Atmospheric precipitation differentiation in the Kaffioyra region (NW Spitsbergen) in summer season, 1980-2008
    Autorzy:
    Przybylak, R.
    Araźny, A.
    Kejna, M.
    Maszewski, R.
    Wyszyński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/260663.pdf
    Data publikacji:
    2009
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    Spitsbergen
    Kaffioyra
    sezon letni
    opady atmosferyczne
    cyrkulacja atmosferyczna
    summer season
    precipitation
    atmospheric circulation
    Opis:
    W opracowaniu przedstawiono zróżnicowanie warunków opadowych w rejonie Kaffioyry (NW Spitsbergen) w sezonie letnim na podstawie danych z lat 1980-2008. Zbadano wpływ cyrkulacji atmosferycznej i warunków lokalnych na opady atmosferyczne. Uzyskane wyniki porównano ze stacją Ny-Alesund.
    Precipitation in the Arctic, including Spitsbergen, is very important for both the biosphere and for the mass balance of glaciers. Our knowledge about its values inside Arctic islands is limited because almost all meteorological stations are located on tundra below 200 m a.s.l. Therefore any information about precipitation conditions occurring on glaciated and non-glaciated areas lying in the inner parts of Spitsbergen is very valuable. In this paper we present results of precipitation measurements carried out in north-western Spitsbergen (the Kaffioyra region and the Ny Alesund station) in selected summer seasons during the period 1980-2008. Precipitation measurements in the Kaffioyra region have been done during Toruń Polar Expeditions in three stations (base station – Kaffioyra-Heggodden (KH) and two glacier stations located in the lower part (LW1) and upper part (LW2) (see Figure 1 and Table 1). Data for the Ny Alesund (NA) station were obtained from the Norwegian Meteorological Institute. In the KH and NA stations measurements were recorded every day, while in LW1 and LW2 they were generally taken every 1-2 days. Results of precipitation conditions are presented for a common period of observations, i. e. for 21st July-31st August. The influence of atmospheric circulation on precipitation was investigated using the catalogue of circulation types constructed by Niedźwiedź (2009). In the summer season precipitation is greater at the end of the study period, than at the beginning. Year-to-year variability of summer precipitation totals is very large. For example, in KH, the highest precipitation (122.5 mm) occurred in 1997, while the lowest (12.3 mm) was in 2007 (Table 2). Also, the frequency of daily precipitation (.0.1 mm) is significantly greater in most wet summer (61.9%) than in most dry summer (28.6%) (see Table 3). Daily precipitation of .10 mm is rare in the KH station and occurred in only 4 out of the 12 summer seasons. It is well known that precipitation is greater in the inner parts of Spitsbergen than in tundra areas. Less is known, however, about the magnitudes of these differences. For the Kaffioyra region precipi-tation observations are available for 9 summer seasons (Tables 5 and 6). From these Tables and Figure 2 it is clear that precipitation on glaciers is almost always greater than in tundra. On average, summer precipitation totals are greater in LW1 and LW2 than in KH by 21.5 and 35.1 mm, respectively. The greatest differences occurred in 1980, while the lowest were in 2007, when even in LW1 precipitation was lower than in KH (Table 5, Figure 3). Lapse rates of precipitation in the Kaffioyra region are greatest between tundra and glaciated areas (oscillating between 13.2mm/100m and 18.5mm/100m between KH and LW2 and KH and LW1, respectively (Table 7)). On the other hand, this lapse rate between stations LW1 and LW2 is the lowest (only 10.7 mm/100 m). Correlation coefficients of 10-day precipitation totals between the meteorological stations in the Kaffioyra region are very high and exceed 0.9. The greatest precipitation in the Kaffioyra region occurred during the inflow of air masses from the southern sector (Table 8, Fig. 7).
    Źródło:
    Problemy Klimatologii Polarnej; 2009, 19; 189-202
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie przestrzenne i wieloletnia zmienność temperatury gruntu w rejonie Stacji Polarnej UMK (NW Spitsbergen) w okresie letnim (1975-2009)
    Differentiation and long-term changes in ground temperature on the Kaffioyra plan (NW Spitsbergen) in the summer season from 1975 to 2009
    Autorzy:
    Przybylak, R.
    Araźny, A.
    Kejna, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/261005.pdf
    Data publikacji:
    2010
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    Spitsbergen
    temperatura gruntu
    sezon letni
    zmienność wieloletnia
    ground temperature
    summer season
    long-term changes
    Opis:
    W artykule przedstawiono podsumowanie wyników badań dotyczących zmian temperatury gruntu w otoczeniu Stacji Polarnej UMK na Kaffioyrze (NW Spitsbergen) w sezonie letnim. Do analizy wzięto dane pomiarowe z 5 głębokości (1, 5, 10, 20 i 50 cm) z 3 różnych ekotopów (plaża, morena i tundra) wykonane w trakcie 17 dotychczasowych wypraw polarnych zorganizowanych przez Instytut Geografii UMK w różnych latach okresu 1975-2009. W celu uzyskania pełnej porównywalności wyników wybrano okres 21.07-31.08, dla którego dostępne są kompletne dane dla niemal wszystkich sezonów letnich analizowanych w artykule. Serie temperatury gruntu na wszystkich stanowiskach i poziomach są ze sobą bardzo silnie skorelowane. Wyraźnie największy wpływ na zmierzone wartości temperatury gruntu w całej badanej warstwie wywiera tempe-ratura powietrza (współczynniki korelacji wahają się od 0,6 do 0,86). Inne elementy meteorologiczne takie jak prędkość wiatru, zachmurzenie i usłonecznienie również w sposób istotny wpływają na temperaturę gruntu, ale głównie w warstwie 0-20 cm (współczynniki korelacji wahają się od 0,15 do 0,28). Istotny statystycznie, chociaż ilościowo bardzo niewielki, wpływ na temperaturę gruntu w warstwie do 20 cm ma także opad atmosferyczny.
    In the present paper a comprehensive synthesis of ground temperature changes on the Kaffiřyra Plain (NW Spitsbergen) in the summer season (21st July to 31st August) from 1975 to 2009 is described. This has been done with two main aims in mind: i) to examine the influence of different ecotypes on ground temperature values in the layer 1-50 cm, and ii) to examine long-term changes of ground temperature. The highest values of long-term average ground temperature in the summer season have been observed between 20th and 25th July. After this period a gradual decrease in ground temperature is observed (Table 2, Fig. 3). One clear cold singularity can be distinguished here occurring at the end of July and start of August which is connected with a significant decrease in air temperature observed very often during this time. In the period 1978-2009 the warmest ground in the entire analysed layer was observed at the ‘Moraine’ site (6.2°C), and the coldest was at the ‘Tundra’ site (5.1°C) – Table 3, Fig. 4. However, in the shallowest layer (up to 1 cm) markedly the warmest site was the beach, while the coldest was at a depth of 50 cm (Fig. 4). The reason for the large decrease of temperature in this layer was that this was where the permafrost roof was at its shallowest. As a consequence of this temperature behaviour in the layer, the ‘Beach’ site shows the greatest lapse rate of ground temperature (-0.78°C/10 cm) (Table 4). In the warmest summer seasons a greater range of ground temperature in the daily cycle is observed than in the coldest ones, which is very clearly seen, in particular in the layer from surface up to 20 cm (Fig. 5). In the study period a significant increase in ground temperature in the layer 1-20 cm was observed starting in 1998, while at a depth of 50 cm this rise can be seen from 2005 onward (Fig. 6). Very high and statistically significant correlation have been found between series of daily ground temperature taken from all sites and all measurement depths (Table 5). Air temperature is a meteorological variable, which has the greatest influence on the values of ground temperature. Correlation coefficients between series of its daily values and series of average daily ground temperature in all analysed depths at the ‘Beach’ site oscillate from 0.6 to 0.86 (Table 6, Fig. 7). Important factors controlling values of ground temperature in the layer 0-20 cm are also wind velocity, cloudiness and sunshine duration (correlation coefficients oscillate between 0.15 and 0.28).
    Źródło:
    Problemy Klimatologii Polarnej; 2010, 20; 103-120
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie przestrzenne wilgotności względnej powietrza w północnej części równiny Kaffiøyra i na Lodowcu Waldemara (NW Spitsbergen) w okresie od września 2010 do sierpnia 2013
    Spatial diversity of air relative humidity in the northern part of the Kaffiøyra plain and the Waldemar Glacier (NW Spitsbergen) from September 2010 to August 2013
    Autorzy:
    Przybylak, R.
    Araźny, A.
    Ulandowska-Monarcha, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/260842.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    Arktyka
    Spitsbergen
    klimat
    wilgotność względna powietrza
    cyrkulacja atmosferyczna
    Arctic
    climate
    relative air humidity
    atmospheric circulation
    Opis:
    W artykule przedstawiono zróżnicowanie przestrzenne wilgotności względnej powietrza w północnej części rejonu Kaffiøyry i na Lodowcu Waldemara w okresie IX 2010 – VIII 2013. W okresie od września 2010 do sierpnia 2011, dla którego istnieją najpełniejsze dane dla wszystkich stanowisk pomiarowych, najwyższe wartości wilgotności względnej zostały zanotowane na szczytach górskich (89%) i na polu firnowym Lodowca Waldemara (86%). Najniższa wartość tego parametru wystąpiła natomiast na tundrze (79%). W całym okresie badawczym, na podstawie zredukowanej liczby stacji, stwierdzono, iż najsuchszy był punkt Kaffiøyra-Heggodden (KH, 83%) zlokalizowany na morenie czołowo-bocznej Lodowca Aavatsmarka, a najbardziej wilgotno było na polu firnowym Lodowca Waldemara (LW2, 85%). Wilgotność względna na badanym obszarze wykazała przeważnie wzrost wartości wraz ze wzrostem wysokości nad poziom morza. Najwilgotniejsze powietrze w rejonie badań towarzyszyło typom cyrkulacji Sc+SWc+Wc i Sa+SWa+Wa (anomalie dodatnie od 7 do 9%), a najsuchsze (anomalie ujemne wahające się od 6% do 9%) podczas napływu mas powietrza z sektora wschodniego, niezależnie od rodzaju układu barycznego. Najmniejsze różnice (do ok. 1-2%) wystąpiły w sytuacjach bezadwekcyjnych reprezentowanych przez typ Ka+Ca.
    This paper presents the spatial diversity of air relative humidity (2 m a.g.l.) in the northern part of the Kaffiøyra Plain and on the Waldemar Glacier (NW Spitsbergen), from September 2010 to August 2013, based on measurements taken at six sites located in different environments (Table 1, Figure 1). Results are described for years and seasons, defined as: autumn (Sep-Oct), winter (Nov-Mar), spring (Apr-May) and summer (Jun-Aug). In the period from September 2010 to August 2011, the highest relative humidity was noted on mountain ridges (89%) and in upper part of the Waldemar Glacier (86%). The lowest value of humidity (79%) occurred at a tundra site called ‘Terrace’, located about two kilometres from the coast (Table 2, Figure 2). In the entire period of observations, for which a reduced number (3) of observation sites exists, drier air (83%) was observed at the Kaffiøyra-Heggodden (KH) site, located in the terminal-lateral moraine of the Aavatsmark Glacier, whereas the wettest air (85%) was measured at the firn part of the Waldemar Glacier (LW2). Relative humidity generally shows an increase as altitude increases above sea level. The marked influence of atmospheric circulation on relative humidity was also noted. In the study period, as compared to long-term values from 1951 to 2006, a decrease in the frequency of occurrence of anticyclonic types and an increase in the frequency of cyclonic types (by 10% and 6.8%, respectively) was also noted (Figure 3). Most humid air in the study area occurred within the circulation types Sc+SWc+Wc and Sa+SWa+Wa (positive anomalies varied from 7% to 9%), and the driest (negative anomalies from 6% to 9%) during air advection from the eastern sector within both anticyclonic and cyclonic weather patterns (Table 3 and Figure 4). The smallest differences (up to 2%) were connected with non-advectional weather type Ka+Ca.
    Źródło:
    Problemy Klimatologii Polarnej; 2014, 24; 25-36
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie wilgotności względnej i opadów atmosferycznych w rejonie Forlandsundet (NW Spitsbergen) w sezonie letnim 2010
    Differentiation of relative humidity and precipitation in the Forlandsundet region (NW Spitsbergen) in the summer 2010
    Autorzy:
    Araźny, A.
    Przybylak, R.
    Kejna, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/261033.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    topoklimat
    wilgotność względna
    opady atmosferyczne
    cyrkulacja atmosferyczna
    Spitsbergen
    Forlandsundet
    topoclimate
    relative humidity
    precipitation
    atmospheric circulation
    Opis:
    W artykule przedstawiono zróżnicowanie wilgotności względnej powietrza oraz opadów atmosferycznych w rejonie Forlandsundet (NW Spitsbergen) w sezonie letnim (21 VII - 31 VIII) 2010 roku. Do analizy wzięto cogodzinne dane wilgotności względnej (z 18 stanowisk) oraz sumy opadów atmosferycznych z okresów 1-3 dniowych (z 11 stanowisk). Dla obydwu badanych elementów meteorologicznych stwierdzono znaczne przestrzenne zróżnicowanie ich wartości uwarunkowane rodzajem podłoża, wysokością nad poziom morza, odległością od morza, ekspozycją oraz lokalną cyrkulacją atmosferyczną. Zbadano wpływ cyrkulacji atmosferycznej na wartości wilgotności względnej i opadów atmosferycznych korzystając z kalendarza typów cyrkulacji dla Spitsbergenu.
    In the paper some main results concerning spatial differentiation of relative humidity and precipitation in the Forlandsundet region (NW Spitsbergen) in summer season (21 VII - 31 VIII) of 2010 are presented (Table 1, Figs 1-2). For analysis hourly data from 18 and 11 sites, respectively for relative humidity and precipitation have been used. Relative humidity was measured using automatic weather stations Davis Ventage Pro2 and MadgeTech sensors. On the other hand, for measurements of precipitation Hellmanns' ombrometers and automatic weather stations Davis Ventage Pro2 have been utilised. Large spatial differences of relative humidity and precipitation noted in the study area were influenced by different factors, e.g. character of ground, altitude above sea level, distance from the sea coast, exposition to the sun and incoming air masses, and local atmospheric circulation. Highest mean values of relative humidity (94.6%) occurred at the site surrounded by the sea (Sarstangen Peninsula, SAT), while the lowest one (86.4%) at the site located 200 m from the Waldemar Glacier termini (ATA) (Table 3, Fig. 3). The first half of the day saw highest values of relative humidity than the second one (Fig. 4). The reason of this may be explained by the opposite daily course of air temperature. Daily courses are getting more and more clear in line with decreasing value of cloudi-ness (Fig. 5). In the Forlandsunet region most frequent were air masses which can be described as humid and very humid. Days with moderate dry and dry air were noted very rarely (Fig. 6). Relative humidity shows usually very high and statistically significant correlation between data from the analysed sites (Table 3). Weak and not statistically significant correlations (r < 0.3) were calculated only between the following pair of sites SAT-PH2 and SJ1-PH2. In the summer 2010 the lowest total of precipitation (8.5 mm) in the KH station, out of all Toruń Polar Expeditions since 1975, have been observed (Table 4). In the firn part of the Waldemar Glacier seasonal total of precipitation was 3-4 times greater than in sites located on coastal plains. In the Kaffioyra Plain and Waldemar Glacier region vertical lapse rate was twofold greater between KH and LW1 than between KH and LW2 (14.7 and 7.7 mm/100m, respectively). In the entire study area, highest summer total of precipitation occurred in the middle part of the Prins Karls Forland island. Relationships between atmospheric circulation and relative humidity as well as precipitation were investigated using data from the KH station and calendar of daily synoptic types for Spitsbergen constructed by Tadeusz Niedźwiedź (Table 5). The most humid conditions in the summer 2010 were observed during inflow of air masses from south-western direction (6.6% above summer mean), while most dry air (-9.7%) - from the north-eastern direction. Similar relationships have been found for precipitation. Analysis of relationships occurring between direction of winds and relative humidity data confirms also the above results. Highest values of relative humidity (>90%) were observed during winds inflowing from the southern sector, while the lowest ones - from the north-eastern direction (Fig. 7).
    Źródło:
    Problemy Klimatologii Polarnej; 2011, 21; 155-172
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Air temperature and precipitation changes in the Kaffioyra region (NW Spitsbergen) from 1975 to 2010
    Autorzy:
    Przybylak, R.
    Kejna, M.
    Arazny, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11944.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    air temperature
    precipitation change
    Kaffioyra region
    Spitsbergen
    1975-2010 period
    climate reconstruction
    summer season
    meteorological element
    Opis:
    Air temperature and precipitation conditions in the Kaffiøyra region in the summer season (21st July–31st August) for the period of 1975–2010 are described: 1) on the basis of data gathered in 18 expeditions during which meteorological measurements were done, and 2) on the basis of complete series of data combining both original and reconstructed data. The latter ones were obtained using data from Ny Ålesund meteorological station, which are strongly correlated with the data from Kaffiøyra. Seasonal statistics presented for air temperature and precipitation based on these two sets of data reveal only slight changes. Temperature parameters (daily mean, maximum and minimum) for summer in Kaffiøyra in the study period (1975–2010) show upward trends, which are, however, statistically significant only for the daily mean. On the other hand, precipitation totals in the study period reveal a downward trend, but not statistically significant. Such thermal-precipitation behaviour in the study part of Spitsbergen in general terms is similar to those in other parts of Spitsbergen.
    Źródło:
    Papers on Global Change; 2011, 18
    2300-8121
    1730-802X
    Pojawia się w:
    Papers on Global Change
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bilans radiacyjny w rejonie Kaffioyry (NW Spitsbergen) w sezonie letnim 2010 roku
    Radiation balance in the Kaffioyra region (NW Spitsbergen) in the summer season 2010
    Autorzy:
    Kejna, M.
    Przybylak, R.
    Araźny, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/260983.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    bilans radiacyjny
    promieniowanie słoneczne
    promieniowanie atmosfery
    promieniowanie ziemi
    Spitsbergen
    Kaffioyra
    radiation balance
    solar radiation
    atmospheric radiation
    long-wave radiation
    Opis:
    W artykule przedstawiono wyniki rejestracji składowych bilansu promieniowania na 3 stanowiskach: Kaffioyra-Heggodden (KH), Lodowiec Waldemara-czoło (LW1) i Lodowiec Waldemara-pole firnowe (NW Spitsbergen) w okresie od 16.07 do 31.08.2010 r. Pomiary prowadzono przy pomocy Radiometru CNR4 firmy Kipp&Zonen. Co minutę rejestrowano natężenie promieniowania słonecznego K?, promieniowania odbitego (K?), promieniowania ziemi (L?) i promieniowania zwrotnego atmosfery (L?). Na tej podstawie obliczono bilans radiacyjny (Q*), składający się z bilansu krótkofalowego (K*) i długofalowego (L*). Stwierdzono niewielkie różnice pomiędzy stanowiskami KH i LW2 założonymi na podłożu morenowym. Najmniej korzystny Q* wystąpił na LW2 nad powierzchnią śnieżno-lodowcową charakteryzującą się wysokim albedo. W artykule zbadano zróżnicowanie przestrzenne składowych bilansu radiacyjnego z dnia na dzień oraz w cyklu dobowym.
    Measurements of radiation balance (Q*) were carried out in the Kaffioyra region (NW Spitsbergen) between 16 July and 31 August 2010 at three stations with different surfaces: KH on the glacial moraine of the Aavatsmark (11.5 m a.s.l.), LW1 - on the terminal moraine of the Waldemar Glacier (130 m a.s.l.), and LW2 - on the firn field of the Waldemar Glacier (375 m a.s.l.) - Fig. 1. A Kipp&Zonen CNR 4 Net Radiometer was used to register - minute by minute - the short wave radiation balance (K*), which is the difference between incoming solar radiation K? and reflected solar radiation (K?), and the long wave radiation balance (L*), which is the difference between downward long wave atmospheric radiation (L?) and upward long wave radiation (L?) - Table 1. In the studied period the maximum intensity of incoming solar radiation reached 709.4 W.m-2 at KH, 882.1 W.m-2 at LW1 and 836.2 W.m-2 at LW2. The mean diurnal sums of incoming solar radiation ranged from 11.04 MJ.m-2 at KH to 10.46 MJ.m-2 at LW1 and 10.60 MJ.m-2 at LW2 (Table 2, Fig. 2). The surface albedo varied, reaching between 13% (LW1) and 15% (KH) on the moraines, and up to 61% (LW2) on the firn field (Table 2, Fig. 3). Thus the lowest value of short wave radiation balance, +4.31 MJ.m-2, was registered at LW2, whereas it was doubled on the moraines: KH +9.50 MJ.m-2 and LW1 +9.09 MJ.m-2 (Table 4, Fig. 4). The flux of downward long wave atmospheric radiation coming from the atmosphere does not reveal any significant differences between individual stations: KH: 27.26 MJ.m-2, LW1: 27.47 MJ.m-2 and LW2 - 27.37 MJ.m-2 in 24h (Table 3). The Earth's surface (upward long wave radiation) was losing, on average: 30.31 MJ.m-2, 29.88 MJ.m-2 and 30.10 MJ.m-2, respectively, and the mean daily values of long wave radiation balance were negative: KH -3.05 MJ.m-2, LW1 -2.42 MJ.m-2 and LW2 -2.73 MJ.m-2. The surface radiation balance (Q*) was the most favourable on moraine bases: LW1 +6.67 MJ.m-2, KH +6.45 MJ.m-2, whereas the snow-covered firn field received the smallest amount of energy: LW2 +1.58 MJ.m-2 (Table 4, Fig. 5). In spite of the polar day, the diurnal cycle of the radiation balance components appears symmetrical with regard to the solar noon, related to the elevation of the sun over the horizon and the temperature of the surface and of the atmosphere. The flux of incoming solar radiation reached its peaks during midday hours with the following mean values: KH: 278.7 W.m-2, LW1: 275.9 W.m-2, and LW2: 295.2 W.m-2 (Fig. 6). At the time of lower culmination of the sun the values of K* were falling to zero. The balance of long wave radiation was negative and reached its highest values around midday hours (KH -50.0 MJ.m-2, LW1 -40.1 MJ.m-2 and LW2 -47.5 MJ.m-2). Q* was the highest in midday hours, when it was 2.5 times higher for moraine bases (KH +194.8 MJ.m-2 and LW1 +201.5 MJ.m-2) than for snow and glacial surfaces (LW2 +79.1 MJ.m-2). At low elevation of the sun Q* became negative: KH -6.8 MJ.m-2, LW1 -5.4 MJ.m-2 and LW2 -19.4 MJ.m-2. On individual days the diurnal cycle of the components of Q* was affected not only by the elevation of the sun, but also by the atmospheric state and the presence of clouds, in particular. For example, on 27 and 28 July 2010 a different weather types occurred (Table 5, Fig. 7). On the first day the sky was completely overcast with St and Sc clouds and no sunshine was observed. On the following day it cleared up with partial cloudiness (Cu, Ac, Ci), and the sunshine duration reached 16.2 h. On 27 July a slight influx of incoming solar radiation was registered (mean intensity 68.6 W.m-2, diurnal sum 5.92 MJ.m-2), K* was 5.14 MJ.m-2, and L* -0.84 MJ.m-2 due to the total cloudiness, which supported substantial downward atmospheric radiation (downward long wave atmospheric radiation 339.3 W.m-2). On the other hand, on 28 July, when the amount of cloudi-ness was moderate, the maximum intensity of incoming solar radiation was 668.7 W.m-2. In 24 hours the total radiation that reached the surface amounted to 22.04 MJ.m-2, and K* increased to 18.90 MJ.m-2. L* was negative (-5.26 MJ.m-2) due to substantial radial emittance of the ground (upward long wave radiation 352,0 W.m-2) and some downward atmospheric radiation (downward long wave atmospheric radiation 291.1 W.m-2). However, the overall radiation balance was three times higher than on 27 July and amounted to 13.65 MJ.m-2. In the studied period, the individual components of Q* were decreasing in value, as a result of the lower and lower elevation of the sun over the horizon and the ending of the polar day.
    Źródło:
    Problemy Klimatologii Polarnej; 2011, 21; 173-186
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Warunki topoklimatyczne w sezonach letnich w rejonie Kaffioyry (NW Spitsbergen) w latach 2005-2009
    Topoclimatic conditions in summer seasons in the Kaffioyra region (NW Spitsbergen) in the years 2005-2009
    Autorzy:
    Kejna, M.
    Przybylak, R.
    Araźny, A.
    Jankowska, J.
    Maszewski, R.
    Wyszyński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/261009.pdf
    Data publikacji:
    2010
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    Spitsbergen
    Kaffioyra
    topoklimat
    temperatura powietrza
    wilgotność względna
    kierunek i prędkość wiatru
    topoclimat
    air temperature
    relative humidity
    wind direction and speed
    Opis:
    W artykule przedstawiono zróżnicowanie temperatury i wilgotności względnej powietrza oraz kierunku i prędkości wiatru w rejonie Kaffioyry (NW Spitsbergen) w sezonach letnich 2005-2009. Na podstawie pomiarów w 8 punktach stwierdzono znaczne różnice topoklimatyczne uwarunkowane rodzajem podłoża, wyso-kością nad poziom morza, odległością od morza, ekspozycją oraz lokalną cyrkulacją atmosferyczną. W rejonie Kaffioyry często występują sytuacje inwersyjne, związane nie tylko ze stratyfikacją termiczno-wilgotnościową napływających mas powietrza, ale również oddziaływaniem czynników lokalnych. Zróżnicowanie topoklima-tyczne zmienia się w zależności od stopnia zachmurzenia i pory doby oraz w czasie formowania się wiatrów lokalnych (wiatry lodowcowe i fenowe).
    The paper presents the spatial differentiation of the meteorological conditions in the summer seasons in the Kaffiřyra in the period 2005-2009. The meteorological measurement points (4 automatic weather stations and 4 electronic devices measuring temperature and humidity, 2 m a.g.l.) were located on the Kaffiřyra Plain (KH) on the Waldemar Glacier area (ATA, LW1, LW2) and on the mountains: Kuven (KU), Grĺfjellet (GF) and Prins Heinrichfjella (PH1, PH2). The analysed five seasons had changeable weather conditions dependent on types of synoptic situations. The highest air temperatures were recorded on the coast (KH 5.8°C) and on the marginal zone of the Waldemar Glacier (ATA 5.1°C). On the glaciated area air temperature is decreasing with the altitude (LW2 2.9°C). The largest temperature lapse-rate is recorded at the transitional area between the glacier and its marginal zone. Growing altitude lowers air temperature on the mountain ridges (GF 4.0°C, PH2 3.6°C), but temperature inversions are recorded quite frequently in the region. Relative air humidity is high due to low temperature and large frequency of occurrence of maritime air masses. The highest mean relative air humidity was recorded on the coast (KH 88%) and on the firn field of the Waldemar Glacier (LW2 84%) as well as on the mountain ridges (PH2 92%). The course of the relative humidity is significantly influenced by foehn winds. Wind directions and velocity in the study area are strongly dependent on the synoptic situation and influence of local factors, mainly orography (foehn winds). Wind regime in the Waldemar Glacier significantly differs from that observed in the Kaffiřyra (here the tunnel effect is observed as a consequence of the narrow Forlandsundet, presences to the abovementioned plain), mainly due to katabatic winds occurrence.
    Źródło:
    Problemy Klimatologii Polarnej; 2010, 20; 63-81
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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