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    Wyświetlanie 1-8 z 8
    Tytuł:
    Wpływ warunków pogodowych na zmionność ablacji lodowców Waldemara i Ireny (NW Spitsbergen) w sezonie latnim 2003 roku
    Influence of meteorological conditions on ablation of Waldemar Glacier and Irene Glacier (NW Spitsbergen) in the Summer season of 2003
    Autorzy:
    Sobota, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/260688.pdf
    Data publikacji:
    2004
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    Spitsbergen
    warunki pogodowe
    Lodowiec Waldemara
    Lodowiec Ireny
    ablacja
    meteorological conditions
    Waldemar Glacier
    Irene Glacier
    ablation
    Opis:
    The paper presents the results of meteorological measurements carried out in the Kaffioyra Plain in the summer season of 2003. The main meteorological observations were conducted in N.Copernicus Polar Station, situated in northern part of the Kaffioyra (NW Spitsbergen). The paper also presents the results of ablation measurements on the Waldemar Glacier and Irene Glacier, which are located at Kaffioyra Region. The mean air temperature in the summer period (21.07. to 31.08.2003) was 6.1°C and was visibly higher then the long-term average. The sum of precipitation in this time was 74 mm and was higher then the long-term average. The comparison between summer season 2003 and mean values from the years 1975-2003 in the common period shows that this season was characterised by air temperature higher then many year?s values. The Waldemar Glacier and Irene Glacier are located in the northern part of the Oscar II Land, northwestern Spitsbergen. In spite of small areas of these glaciers, there is great spatial variation of ablation. Both Waldemar Glacier and Irene Glacier area and the height difference between the accumulation zone and the ablation area are relatively small. Nevertheless, spatial variation of ablation is observed. In this summer season the highest ablation values of Waldemar Glacier were noted in the ablation area of the glacier up to the altitude of about 250 m a.s.l., as well as at the foot of its medial moraine. The highest ablation values of Irene Glacier were noted in the ablation area of the glacier up to the altitude of about 300 m a.s.l.. During the analysed season a high average air temperature was observed. It resulted in increased ablation if compared to the previous seasons. Average air temperature and local glacier conditions were accepted as the main factors of ablation. The glacier average total summer ablation of Waldemar Glacier was 118.1 cm w.e. And Irene Glacier 111.1 cm w.e., respectively. The main meteorological parameters, which have an influence on ablation, are air temperature, wind velocity, insolation and participation. But it must be stressed that these parameters are clearly determined by local conditions of glaciers such as hypsometry, solar exposition, slope as well as density and the course of supraglacial streams.
    Źródło:
    Problemy Klimatologii Polarnej; 2004, 14; 95-106
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ warunków meteorologicznych na kształtowanie się odpływu powierzchniowego na Lodowcu Waldemara (NW Spitsbergen) latem 1997 roku
    Influence of meteorological conditions to the surface run-off on the Waldemar Glacier (NW Spitsbergen) in the summer of 1997
    Autorzy:
    Brykała, D.
    Araźny, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/260802.pdf
    Data publikacji:
    2000
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    Spitsbergen
    warunki meteorologiczne
    Lodowiec Waldemara
    pomiary meteorologiczne
    ablacja
    Opis:
    In the summer season 1997 during the 13rd Toruń Polar Expedition research works were carried out to investigate the dynamics of water run-off in a selected supraglacial stream on the Waldemar Glacier in comparison to the course of meteorological conditions and ablation (figs l and 3). We have tried to present also the temporal and spatial changes in the structure of surface run-off on the glacier. Over the Kaffiöyra region in the whole summer season, especially in August, cyclonic weather dominated. Its characteristic features were: small sunshine duration (16.6 percent of the possible value), high cloudiness (8.5 on the scale l-10), high frequency of strong winds (mean velocity 5.4 m/s), and very abundant and intensive atmospheric precipitation (sum 122.5 mm) (fig. 2). The ablation is considerably differentiated spatially and temporary. In the studied period its highest value was observed below 250 m above sea level, and the lowest one on 430 m above sea level (19 cm e.w.). On 150 m above sea level, at the hydrometric stand, the ablation was 119 cm e.w. The gradient of ablation varied from 0.3 cm to 3.6 cm e.w. per 100 m height in the selected periods (Sobota 1998). The three big streams marked on fig. 3 (A. B and e) have the greatest role in the formation of the surface drainage system of the Waldemar Glacier. Daily measurements of the discharge intensity were made on the 508.6 m long supraglacial stream. The stationary measurement point was on 147m above sea level, about 160 m above the place where the stream leaves the snout of the glacier. The spatial differentiation induced the authors to distinguish five glacio-hydrological zones on the Waldemar Glacier: intensive ablation. Organized run-off, snow patches, slush, and dry snow (fig, 4, tab. l). The main criteria to distinguish the individual zones were the followings: morphology of the glacial surface, pollution degree of the snow by moraine material, and types of the surface run-off. Table 2 presents the correlation coefficients between the meteorological parameters and ablation and the discharge in the analysed stream. In most of the cases the correlation between the individual parameters is high (r > 0.77). The highest values of the correlation coefficient occur between the discharge and the course of temperature and ablation.
    Źródło:
    Problemy Klimatologii Polarnej; 2000, 10; 139-158
    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:
    Cofanie się czół lodowych Zachodniego i Wschodniego Lodowca Torella (SW Spitsbergen)
    The recession of Vestre and Austre Torelbreen ice clifs (SW Spitsbergen)
    Autorzy:
    Řehak, J. sen.
    Řehak, J. jun.
    Řehak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/260690.pdf
    Data publikacji:
    2004
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    lodowce
    Lodowiec Torella
    Spitsbergen
    glacier
    Torelbreen ice clifs
    Opis:
    When documentary work was carried out on the Vestre and Austre Torellbreen, an extremely strong recession of ice cliffs of both glaciers was observed. In order to obtain more detailed picture of the observed retreat over the period 2001, 2002 and 2003, GPS measures of the ice cliffs location and the location of glacier fronts were taken. Then the obtained results were compared to previous maps (Fig. 1). The ice cliff of the AustreTorellreen retreated by 3190m from the year 1936 till 2003. The fastest recession of this ice cliff was noted over the last three years; the average rate of the retreat reached 166m/year. The ice cliff of the Vestre Torellreen retreated by 3163m from the year 1936. The maximum speed of the recession of this cliff was also noted in the last three years and reached 68m/year. The sides of both glaciers which are located on the shore tend to have lower rate of recession, i.e. 40-50m/year. The retreat of glaciers is mainly attributed to the observed global warming but in the case of the Vestre and Austre Torellbreen which empty for the sea, it is the increase in sea surface temperature that plays the main role. The annual temperature of the coastal waters between Bellsund and Hornsund, that is in waters adjacent to both glaciers increased by 2°C over the period from 1996 and 2002. Such significant warming in the sea water together with the prolonged period without sea ice cover result in advanced undercutting of ice cliffs by waves and an increased role of calving in the negative mass balance of glaciers. The retreat of the ice cliff of the Vestre Torellbreen, which is partially sheltered against waves by a recently formed spur, has a rate half lower.
    Źródło:
    Problemy Klimatologii Polarnej; 2004, 14; 87-94
    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:
    Związek krótkookresowych zmian miąższości pokrywy śnieżnej na Lodowcu Avatsmarka (NW Spitsbergen) z parametrami meteorologicznymi wiosną 2001 i 2002 roku
    The relations between short-term changes of the snow thickness on Aavatsmark Glacier (NW Spitsbergen) and meteorological parameters in spring seasons 2001 and 2002
    Autorzy:
    Grabiec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/260686.pdf
    Data publikacji:
    2004
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    pokrywa śnieżna
    lodowce
    Lodowiec Avatsmarka
    snow cover
    Aavatsmark Glacier
    Opis:
    The work has been intended to determine relations between short-term changes of the snow cover thickness on the glacier and meteorological parameters recorded on the glacier and in the glacier vicinity. Short-term relations are regarded as connections between variations of the snow depth on the glacier and the course of meteorological factors in a scale of up to 24-hours. Detailed snow and meteorological measurements were carried out on the equilibrium line (364 m a.s.l.) of Aavatsmark Glacier (NW Spitsber-gen) in two periods: 11 - 30th April 2001 and 12th April - 5th May 2002. The thickness of snow was investigated with the use of Sonic Ranging Sensor SR50 Campbell Scientific Ltd. Meteorological data comes from an automatic weather station located on the glacier?s surface and from meteorological sites on Kaffioyra and Ny-Alesund. All measurements were taken in 10-minute step. Short-term changes of the snow thickness on glaciers in winter seasons are influenced by the precipitation and snow transport. The wind power determines the scale of snow transport. In consequence, the increase of wind speed causes higher intensity of changes of the snow level. The intensity of changes of the snow depth within the range from 0 to 8ˇ10-6 m/s is connected with the average wind speed of 4 m/s and changes intensity over 17ˇ10-6 m/s accompanied the average wind speed 8.7 m/s. The appearance of precipitation in daily or longer time-scale causes the increase of snow thickness and the weakness of relations between changes of the snow depth and the wind speed. In a time-scale of several hours the snow supply leads to the increase of both intensity and amplitude of snow level changes. Significant increase of the intensity and amplitude of changes of snow depth took place over the average wind speed 5 m/s in days without precipitation and over 8 m/s in days with snowfall. Short-term changes of the snow thickness are constrained by availability of an unconsolidated, easy-to-transport material. The major part of that material comes from precipitation. As a result short-term changes of the snow depth are more noticeable during days with precipitation. A thin crust layer on the snow surface has been formed as a result of friction of air masses and snow particles. In emergence of the positive tempe-rature and good radiation conditions in the upper snow layer ice crust can be formed. After stabilization of the snow cover even powerful wind gust can?t start transporting the material and short-term changes of the snow thickness are limited.
    Źródło:
    Problemy Klimatologii Polarnej; 2004, 14; 107-126
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie albedo Lodowca Scotta (W Spitsbergen)
    The 'Albedo' differentiation at Scott's Glacier (W Spitsbergen)
    Autorzy:
    Siwek, K.
    Gluza, A.
    Bartoszewski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/260684.pdf
    Data publikacji:
    2004
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    pokrywa śnieżna
    ablacja
    Lodowiec Scotta
    Spitsbergen
    snow cover
    ablation
    Scott's Glacier
    Opis:
    The aim of the present study was the quantitative determination of ?albedo? which is a significant factor influencing the balance of short-wave radiation. The value of surface albedo allows to determine its role in the heat balance of the active surface which in turns influences the ablation level. Studies on the accumulation and ablation conditions of the snow cover commenced on Scott?s Glacier in 1987. On average, the thickness of the frontal part decreased by 75 m, i.e. 2.7 m annually. Decession of the glacier was confirmed by studies carried out in 2001 during which it was found that Scott?s Glacier had decreased in its surface area by over 10% in the period 1986?2001. Three types of active surfaces, i.e.: land, ice and water, play a significant role in the radiation balance of the Arctic. During the summer months practically all the heat reaching the surface of the earth is taken up in thawing the ice. In the summer of 2001, a substantial variation of albedo occurred on Scott?s Glacier. The above changes depended to a large extent on the physical properties of the glacier?s surface. High spatial differentiation of albedo was also observed in the period studied (i.e. the summer of 2001). The lowest values (15-25%) occurred at the front of the glacier which was covered with ice and numerous kryokonite smelts filled with water or polluted with morenic or eolic material. Somewhat higher values (40-60%) were found in the supraglacial river valleys and in the zone of surface water deposits as they turned into slush. The highest albedo values occurred in the firn field where leveled snow, often firn, or fresh wind-blown snow was deposited (60-85%). After the precipitation of the fresh, clean snow, albedo increased and reached values above 88%.
    Źródło:
    Problemy Klimatologii Polarnej; 2004, 14; 127-132
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania glacjologiczne współczesnych zmian Lodowca Ireny, Svalbard
    The Irene Glacier changes glaciological investigations, Svalbard
    Autorzy:
    Sobota, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/261041.pdf
    Data publikacji:
    2010
    Wydawca:
    Stowarzyszenie Klimatologów Polskich
    Tematy:
    bilans masy lodowca
    akumulacja śniegu
    ablacja
    lodowiec
    Svalbard
    glacier
    snow accumulation
    mass balance
    Opis:
    Badania glacjologiczne przeprowadzono na Lodowcu Ireny, o powierzchni 4,1 km2 (2009), zlokalizowanym na Kaffioyrze na północno-zachodnim Spitsbergenie. Obejmowały one zagadnienia topnienia lodowca, zmienności akumulacji śniegu w sezonie wiosennym i letnim oraz zmian bilansu masy, powierzchni i położenia czoła lodowca. Szczegółowo przeanalizowano lata 2008 i 2009. Różniły się one wyraźnie warunkami pogodowymi, zwłaszcza w okresie letnim, co miało istotny wpływ na poszczególne elementy określające wielkość zmian i dynamiki lodowca. W dłuższym przedziale czasowym (2002-2009), lodowiec Ireny charakteryzuje się wyraźnie negatywnymi zmianami, zwłaszcza ujemnym bilansem masy, jak również cofaniem się czoła i zmniej-szaniem powierzchni. Jednakże występują lata, które wyraźnie różnią się od ogólnego negatywnego kierunku zmian. Przykładowo sytuacja taka miała miejsce w roku 2008.
    The glaciological investigations of the Irene Glacier changes, a 4.1 km2 glacier located in NW Spitsbergen, Svalbard, were undertaken. Traditional glaciological mass balance measurements by stake readings and snow surveying have been conducted annually since 2002. In this paper 2008 and 2009 mass balance years were analyzed in details.. Glaciological research of the Irene Glacier refers to the following issues: glacier's melting, changes in the snow accumulation during the spring and summer seasons, and the changes of the area and the position of the glacier’s tongue. The years 2008 and 2009 were distinct in terms of the weather conditions, especially during the summer season. This significantly influenced the individual elements which describe the changes and dynamics of the glacier. Glaciological methods of mass balance estimation involve repeated stake measurements at the glacier surface to determine the rates of ablation and accumulation. These methods involve estimation of local mass balance using ablation poles, supplemented with studies of the snow cover in pits. At the end of the 2008 ablation season snow cover occured on about half of the glacier surface. In 2009 in the same time snow was visible only in the upper part of the accumulation zones of this glacier and at the foot of the mountain slopes. The 2008 winter balance of the Irene Glacier was 55 cm w.e, and 65 cm e.w.in 2009. In the balance year 2009, in spite of the winter snow accumulation higher than the average, the annual net mass balance of the Irene Glacier was definitely negative. In 2008 mean annual mass balance of the Irene Glacier was -38 cm w.e. In 2009 mean annual mass balance of the Irene Glacier was -63 cm w.e. and was very similar to the mean multi-annual value of the annual net mass balance of this glacier. Spatial diversity of mass balance of the Irene Glacier is mainly influenced by weather conditions over a specific part of the glacier and by local morphology. In 2009, the spatial diversity of the net mass balance of the Irene Glacier was mostly influenced by its negative value in the ablation area. The net mass balance in the ablation area of the glacier was up to -250 cm w.e. The zone of the negative net balance covered a larger area if compared to the previous years and especially to the year 2008. Such a situation predominantly resulted from a higher ablation. In 2009 mean annual mass balance of the Irene Glacier was similar to the mean multi-annual value of the net mass balance of this glacier. In the balance year 2009, in spite of the winter snow accumulation, higher than the average, the annual mass balance of the Irene Glacier was definitely negative. This was the result of intensive ablation during the summer season. The negative net mass balance of the Kaffiřyra region glaciers recorded in recent years influences their geometry, especially shrinking the area and lowering the surface, as well as changing their front positions. Between 2000 and 2009, the area of the Irene Glacier decreased by about 3%. In the years 2002-2009 the Irene Glacier showed negative tendencies, especially in its mass balance. Moreover, the retreat of the tongue and the decrease of the glacier’s area were recorded. However, there were also years which differed a lot from the general negative trend of changes. For instance, such a situation was recorded in 2008. It must be stressed that large winter snow accumulation does not necessarily influence the lower negative mass balance. Similarly, intensive melting during the summer season does not necessarily mean significant negative mass balance value. It is connected with the weather conditions in a given year and seasonal balance, as well as with other local conditions of the glacier. As a result, the inter-dependency between climate and mass balance may be slightly distorted. Nevertheless, mass balance of a glacier remains one of the most important indexes of modern climate changes. Glaciological studies of the Irene Glacier pose an important element in the estimation of modern changes in the cryosphere of the Kaffiřyra Region, which is an example of changes in the environment of the NW Spitsbergen.
    Źródło:
    Problemy Klimatologii Polarnej; 2010, 20; 143-159
    1234-0715
    Pojawia się w:
    Problemy Klimatologii Polarnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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