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Wyświetlanie 1-4 z 4
Tytuł:
Zmiany zasięgu czoła i geometrii lodowca Renarda (Spitsbergen) na tle zmian klimatycznych XX wieku
Change of extent of front and geometry of the Renard Glacier (Spitsbergen) in the background of climatic fluctuation in 20th century
Autorzy:
Zagórski, P.
Siwek, K.
Gluza, A.
Powiązania:
https://bibliotekanauki.pl/articles/260701.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
Spitsbergen
Renard Glacier
geometria lodowca
geometry glacier
Opis:
W artykule scharakteryzowano reakcję lodowca Renarda na zmiany klimatu w XX wieku. Bezpośrednim ich odzwierciedleniem były zmiany: zasięgu czoła oraz geometrii powierzchni. Lodowiec Renarda położony na obszarze NW części Ziemi Wedela Jarlsberga jest przykładem lodowca, który od końca Małej Epoki Lodowej podlega nieprzerwanej recesji. Charakteryzowała się ona zróżnicowanym tempem, z okresami przys-pieszenia oraz spowolnienia. Przeanalizowano również zmiany geometrii lodowca będące odzwierciedleniem dodatniego lub ujemnego bilansu strefy alimentacyjnej oraz wysokości linii równowagi.
Spitsbergen glaciers react rapidly to the changes in the polar environment. The evidence for that are changes in the extent of fronts and surface geometry. The Renard Glacier, which is situated in the NW part of Wedel Jarlsberg Land, is an example of the glacier that has undergone continuous recession since the Little Ice Age (LIA). The largest size of the Renard Glacier was reached at the end of XIX century (end of LIA) - 38 km2, but in 2006 its area decreased to 31.3 km2 (17.7%). Recession of the Renard Glacier has been characterised by diverse speed, two periods of acceleration: first in 1936-1960 and second since 1990s till now and two periods of slow down in 1960-1990 and 2000-2005. Such types of changes in speed of recession of glacier front were the results from the glacier reaction (with certain delay) to XX century climate changes. The fastest recession has been noted for period 2005-2006: it is 14 ma-1, when the multi-annuals mean for 1936-2006 is 10 ma-1. Following quick climate warming at the beginning of XX century and at the turn of XX and XXI century accelerated reduction of both surface and thickness of glacier while colder weather of 1960s made certain build-up of its surfaces, especially alimentation areas. The reason for that phenomenon was changeable height of equilibrium line which oscillated between 300 and 430 m a.s.l.
Źródło:
Problemy Klimatologii Polarnej; 2008, 18; 113-125
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Warunki meteorologiczne na stacji w Calypsobyen w sezonie letnim 2014 na tle wielolecia 1986-2011
The meteorological conditions on the Calypsobyen in summer 2014 on the background of multiyear 1986-2011
Autorzy:
Mędrek, K.
Gluza, A.
Siwek, K.
Zagórski, P.
Powiązania:
https://bibliotekanauki.pl/articles/261067.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Klimatologów Polskich
Tematy:
warunki pogodowe
Calypsobyen
Bellsund
Svalbard
weather conditions
Opis:
W opracowaniu scharakteryzowano przebieg warunków pogodowych podczas XXVI Wyprawy Polarnej Uniwersytetu Marii Curie-Skłodowskiej na Spitsbergen. Pomiary wykonywano od 8 lipca do 1 września 2014 roku za pomocą automatycznej stacji meteorologicznej zainstalowanej w Calypsobyen (Bellsund, Svalbard). Analizie poddano temperaturę i wilgotność względną powietrza na wysokości 200 cm nad powierzchnią gruntu (n.p.g.), temperaturę powietrza przy gruncie (5 cm n.p.g.) oraz prędkość i kierunek wiatru. Uzyskane wyniki zostały porównanie z danymi, dla okresu wspólnego, z dwudziestu sezonów pomiarowych z lat 1986-2011 tj. od 10 lipca do 25 sierpnia.
Arctic is an area which rapidly react on the changes in environment. The weather conditions react the most quickly and determine other changes in geosystem. That is why the meteorology is the subject not only for meteorologist and climatologist but also for other researchers (like geomorphologists, hydrologists) and makes the background for their research in polar region. The region of Wedel Jarlsberg Land (western coast of Spitsbergen) has been a field of taking research by scientist from the Maria Curie-Skłodowska University (Lublin) for almost 30 years. Meteorological observations were carried out since 1986. At the beginning, measurements were taken every 3 or 6 hours. Since 1999 measurements have been doing by automatic stations taking measurements with 10 minutes time step (144 times per day). The aim of this paper is to present course of meteorological conditions during the XXVI Expe-dition of UMCS to Spitsbergen in 2014 on the background of multiyear 1986-2011. The station was located on Calypsostranda, a flat sea terrace, at the height of about 23 m a. s. l., at a distance of 200 m from Bellsund Fjord and 2 km from the Scott Glacier. The substratum was made of dry lichen-moss tundra. In 2014, the meteorological investigation began on 8th July and ended on 1st September. The mean daily air temperature at the altitude of 200 cm amounted to 5.9°C throughout the measurement period. The highest mean daily temperature (8.4°C) was recorded twice: the 23rd July and 4th August. The lowest mean daily temperature (3.1°C) was recorded the 31st August. Mean daily air temperature at the altitude of 5 cm also amounted to 5.9°C. The highest temperatures are recorded around 12 UTC, and the lowest just before midnight. In the 5-18 UTC temperature at 5 cm is higher than the temperature at 200 cm. The highest maximum temperature at the altitude of 200 cm (12.2°C) and at the altitude of 5 cm (14.0°C) was recorded the 4th August. Minimum temperature at the altitude of 200 cm (1.5°C) was recorded the 27th August and at the altitude of 5 cm (-1.7°C) the 25th August. The mean daily relative humidity at a height of 200 cm above the ground amounted to 85% and only twice (4th and 24th August), the humidity dropped below 60%, which was associated with the presence of foehn from the East. For the whole measurement period, the total precipitation amounted to 38.6 mm. 17 days with a precipitation ≥ 0.1 mm were observed (which means that rainfall occurred in 30% of the days). The highest rainfall amounted to 9.6 mm and occurred on 10th July when the air temperature at the altitude of 200 cm decreased from 10.2 do 5.6°C and the weak south wind changed direction to the west, and his speed increased to more than 7 m∙sˉ¹. The mean wind speed was 3,6 m∙sˉ¹ throughout the season. To compare selected meteorological weather conditions of the summer season 2014 against the multiyear 1986-2011, based on data for the period that is common (10th July – 25th August). The mean daily air temperature in 2014 was up to 1.1°C higher than the average temperature of period 1986-2011. Only season of 2002 was characterized by higher average temperature (6.3°C). The sum of the 2014 season precipitation was lower than in multiyear. The mean daily wind speed of season 2014 was 3.6 m sˉ¹ and was lower only by 0.7 m ·sˉ¹ from the mean of multiyear. During the season 2014, the winds from W were dominated (25.7%), while its frequency in other seasons does not exceed 5-10%.
Źródło:
Problemy Klimatologii Polarnej; 2014, 24; 37-50
1234-0715
Pojawia się w:
Problemy Klimatologii Polarnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical characteristics of land waters in the Bellsund region (Spitsbergen)
Autorzy:
Chmiel, S.
Bartoszewski, S.
Gluza, A.
Siwek, K.
Zagórski, P.
Powiązania:
https://bibliotekanauki.pl/articles/294579.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
physicochemical characteristics
Spitsbergen
land waters
Źródło:
Landform Analysis; 2007, 5; 13-15
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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