Wyniki wyszukiwania - Biblioteka Nauki

1

Porownanie bilansu masy wybranych lodowcow Svalbardu i Alp

100%

Grzes M. , Krol M.

Czasopismo Geograficzne

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2006

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tom 77

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nr 1-2

83-100

2

Związek krótkookresowych zmian miąższości pokrywy śnieżnej na Lodowcu Avatsmarka (NW Spitsbergen) z parametrami meteorologicznymi wiosną 2001 i 2002 roku

100%

Grabiec M.

Problemy Klimatologii Polarnej

|

2004

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tom nr 14

107-126

EN

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.

3

Nalodzia pochodzenia lodowcowego na Svalbardzie.

100%

Bukowska-Jania E.

Czasopismo Geograficzne

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2001

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tom 72

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nr 3-4

301-328

4

Zastosowanie modelu r.sun do określenia dobowych sum promieniowania rzeczywistego na lodowcu Werenskjolda (Sw Spitsbergen)

100%

Kryza M. , Szymanowski M. , Migala K.

Prace i Studia Geograficzne

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2011

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tom 47

EN

The r.sun model was applied to assess the spatial and temporal changes in incoming total (beam + diffused) real sky radiation. Presented approach accounts for aerosol, precipitable water content and cloudiness effects on attenuation of solar radiation. The results are compared with the measurements gathered at Polish Polar Station, showing good agreement.

5

Płytowe wymienniki ciepła. Część 3. Projektowanie płytowych wymienników ciepła zasilanych zawiesiną lodową

86%

Niezgoda-Żelasko B. , Zalewski W.

Technika Chłodnicza i Klimatyzacyjna

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2010

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tom nr 8

318-326

PL

Trzecia z cyklu publikacji, których celem jest przedstawienie prostych metod obliczania różnych typów płytowych wymienników ciepła typu ciecz-ciecz, parowników, skraplaczy oraz wymienników krzyżowo-prądowych typu gaz-gaz. Prezentowane sposoby prowadzenia obliczeń zobrazowane są przykładami obliczeniowymi. Druga z publikacji tego cyklu ukazała się w „TCHK” w numerze 6-7/2010 (s.246) i była poświęcona sposobom prowadzenia obliczeń cieplnych wymienników płytowych, pełniących rolę parowaczy i skraplaczy oraz wymiennika krzyżowo-prądowego typu gaz-gaz, stosowanego w układach do odzysku ciepła. Podane zostały w niej procedury wyznaczania pola powierzchni tych wymienników dla założonej ich wydajności cieplnej. Zaproponowane metody obliczeniowe zweryfikowano obliczeniami wykonanymi programem komputerowym firmy Sondex. Trzecia część cyklu poświęcona jest obliczeniom cieplnym i przepływowym wymienników zasilanych zawiesiną lodową. I w tym przypadku podano przykładowe obliczenia cieplne wymiennika płytowego zasilanego taką zawiesiną

EN

This is third part of papers dealing with simple methods of heat transfer calculations in liquid-liquid plate heat exchangers plate evaporators, plate condensers gas-gas cross flow plate exchangers. Calculation examples areincluded. The second part has been published TCHiK 6-7/2010and dealt with calculationmethods for plate evaporators, condensers and gas-to-gas heat exchangers used in heat recovery systems. methods of heat transfer area calculation for demanded heat capacity have been described and postively verified with the use of computer code for heat exchangers selection by Sondex. The third part of papers deals with calculation methods for heat exchangers working with slurry ice. Here calculation example are included as well.

6

Changes of glaciation in the northeastern Sorkapp Land, Spitsbergen, 1961-1971

86%

Sokolowski J. , Ziaja W.

Polish Polar Research

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1993

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tom 14

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nr 3

309-312

7

Cofanie się czół lodowych Zachodniego i Wschodniego Lodowca Torella (SW Spitsbergen)

86%

Řehak J. s. , Řehak J. j. , Řehak S.

Problemy Klimatologii Polarnej

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2004

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tom nr 14

87-94

EN

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.

8

Wpływ lodowców na przekształcenie wybrzeży NW części Ziemi Wedela Jarlsberge (Spitsbergen) w późnym plejstocenie i holocenie

86%

Zagorski P.

Słupskie Prace Geograficzne

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2007

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nr 04

9

Uwagi w sprawie notatki P. Klysza pt. Problem powstawania walow lodowo-morenowych na przykladzie lodowcow w rejonie fiordu Hornsund [Spitsbergen]

86%

Kozarski S.

Przegląd Geograficzny. Polska Akademia Nauk

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1995

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tom 67

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nr 3-4

373-375

10

Metody rekonstrukcji wysokości linii równowagi lodowców

86%

Zasadni J.

Czasopismo Geograficzne

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2010

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tom 81

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nr 1-2

11

Oazy w świecie lodu

86%

Zawierucha K. , Cytan J.

Wiedza i Życie

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2013

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nr 01

12

Porownanie form krasowych wyspy Madre de Dios [Patagonia Chilijska] z formami kriokrasowymi na lodowcach polnocno-zachodniego Spitsbergenu

86%

Sobota I.

Przegląd Geograficzny. Polska Akademia Nauk

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2005

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tom 77

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nr 1

95-107

13

Lichenometryczna analiza rozkładu częstości jako metoda datowania moren lodowca Fláa (SE Islandia)

86%

Dabski M.

Słupskie Prace Geograficzne

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2007

|

nr 04

14

Mikrobiocenozy regionów polarnych w dobie globalnego ocieplenia

86%

Grzesiak J. , Zdanowski M. K.

Kosmos

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2013

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tom 62

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nr 3

15

Ablacja Lodowca Waldemara (Ziemia Oskara II, NW Spitsbergen) w sezonach letnich 1977, 1978 i 1980

86%

Wójcik G. , Marciniak K. , Przybylak R.

Problemy Klimatologii Polarnej

|

1999

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tom nr 9

89--102

EN

This paper presents results of ablation measurements carried out on the Waldemar Glacier (Oscar II land, NW Spitsbergen) during the three-summer seasons (23rd July - 20th August) 1977, 1978 and 1980. The measurements were conducted along longitudinal profile (stakes no. I to X), which begun a little above the glacier terminus (130 m a.s.I) and ended in the firn field (376 m a.s.I.). In addition, ablation measurements were also carried out along two transitional profiles. The first profile (stakes no. XI to XX) was located at the altitude of about 200 m a.s.I., and the second one (stakes no. XXII-XXX) at the altitude of 300-330 m a.s.I. (Fig.1). Data of general weather conditions come from the base station located in the Kaffiöyra Plain (Table 1), while for the glacier available are only the temperature data from two stations: LW1 (130 m a.s.I.) and LW2 (380 m a.s.I.) (Table 2). The mean seasonal values of ablation (in cm of water equivalent) are presented in Table 3. Ablation shows a relationship with the altitude a.s.I and with the distance from the glacier terminus. The mean seasonal 3-year ablation values (from the common period 23rd July - 20th August) in the stake no. I was equal to 85.2 cm, while in the stake no. X only 37.2 cm (Table 3). The hypsometric lapse rate of ablation was equal to about 19.51 cm! 100 m (Fig. 2). The mean ablation values computed for transitional profiles were equal to 60.0 cm (for the lower profile) and 53.2 cm (for the upper profile). The relationship of ablation with altitude is a consequence of decreasing temperature with the rise of altitude. On the Waldemar Glacier the rate of temperature decreasing is equal to 0.52°C/100 m. Our investigations confirm the well-known fact that the ablation is strongly influenced by the solar-radiation conditions. On the mountain glaciers solar irradiance causes the differentiation of ablation processes along the longitudinal profile. However, it was also observed that on the Waldemar Glacier (and probably on majority of the Spitsbergen glaciers) the highest ablation values are occurring under dynamical advection of warm and humid air, which often brings the abundant warm rain, as in the case of days 15 to 16 August 1980.

16

Problem powstania walow lodowo-morenowych na przykladzie lodowcow w rejonie fiordu Hornsund [Spitsbergen]

86%

Klysz P.

Przegląd Geograficzny. Polska Akademia Nauk

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1995

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tom 67

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nr 1-2

121-132

17

Wstępne wyniki badań nad metodyką określania jednorodności skał macierzystych gleb pochodzenia lodowcowego

86%

Kowalkowski A. , Staszewski T.

Roczniki Gleboznawcze

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1965

|

tom 15

|

nr 1

18

Arktyka najmniejszych niedźwiedzi

72%

Zawierucha K.

Salamandra:Magazyn Przyrodniczy

|

2014

|

nr 2

19

Recesja ladolodow i lodowcow oraz degradacja wieloletniej zmarzliny

72%

Zwolinski Z. , Dobinski W.

Kosmos

|

2008

|

tom 57

|

nr 3-4

209-224

20

Charakterystyka zmienności pokrywy śnieżnej w sezonie letnim (ablacyjnym) na lodowcach rejonu Kaffioyry (NW Spitsbergen)

72%

Sobota I.

Problemy Klimatologii Polarnej

|

2007

|

tom nr 17

135-145

PL

Przeanalizowano wielkość oraz przestrzenną zmienność akumulacji śniegu na lodowcach rejonu Kaffioyry w sezonie letnim 2006 roku. Pokrywa śnieżna na lodowcach Waldemara i Ireny występowała do połowy sierpnia, a w najwyższych partiach pól akumulacyjnych i u podnóża stoków górskich przez cały sezon ablacyjny. W przypadku Lodowca Elizy pod koniec sezonu śnieg zajmował wyraźnie większą powierzchnię. Na podstawie szczegółowych pomiarów dokonano oceny zmienności akumulacji z wysokością nad poziomem morza oraz zróżnicowanie gęstości śniegu. Pozwoliło to określić ekwiwalent wodny pokrywy śnieżnej. Stwierdzono, że znajomość miąższości i przestrzennego zróżnicowania pokrywy śnieżnej w okresie letnim oraz stref glacjalnych na lodowcu stanowi ważny element w badaniach i ocenie tempa ablacji lodowcowej.

EN

Size and spatial variability of snow accumulation on the Kaffiřyra glaciers were analysed in the summer of 2006. The values of accumulation changeability at the growing altitude and the diversity of accumulation density were based on detailed measurements. This enabled to estimate the thickness of the snow cover in water equivalent (w.e.). In the summer season of 2006 average snow accumulation on the Waldemar Glacier was 9.3 cm of water equivalent. On average, it changed from 24.1 cm w.e. at the beginning of the summer season to 1.1 cm w.e. in August. Mean snow accumulation on the Irene Glacier amounted to 7.3 cm e.w.; on average it changed from 15.6 to 1.0 cm w.e. Mean snow accumulation on the Elise Glacier was 25.8 cm w.e. and it changed from 36.1 July to 12.0 cm w.e. at the end of August. The largest diversity of snow accumulation at the growing altitude was recorded on the Elise Glacier. From both the Waldemar Glacier and Irene Glacier the snow cover disappeared quickly. As a result, at the end of the ablation season snow was only visible in the upper parts of the accumulation zones of those glaciers and at the foot of the mountain slopes. The Elise Glacier had a longer-lasting snow cover on large areas which survived until the end of the season. This was not only the outcome of the weather conditions but, predominantly, larger altitude diversity between the snout of this glacier and its accumulative pars as well. In higher parts of the glacier a larger snow loss in time is recorded. Mean snow thickness in the summer season is nearly twice higher than during the spring season with the snow cover. There is a correlation between the snow cover thickness and the altitude. However, with time and the diminishing snow cover this interrelation is less distinct. Another distinct interrelation exists between spatial diversity of snow accumulation and the size and spatial diversity of snow ablation. Melting of the snow cover during the summer season favours the creation of different glacial zones which influence the intensity of summer ablation. The knowledge of the thickness and spatial variability of the snow cover during the summer season, as well as the glacial zones poses an important element of the study and assessment of the rate of glacial ablation.