Wyniki wyszukiwania - Biblioteka Nauki

1

Temperatura gruntu w rejonie Stacji Polarnej w Hornsundzie

100%

Miętus M. , Filipiak J.

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2001

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tom nr 11

67-80

EN

The mean annual soil temperature, evaluated for the depths 5, 10, 20, 50 and 100 cm is negative and varies between -4.5°C in the subsurface layer and -4.2°C in the deeper parts of the analyzed profile. The soil is frozen through almost nine months in the year. During the lasting a short period spring and autumn there is an isothermy in the soil. Greater variability occurs in the subsurface layer. The layer between 50 and 100 cm accumulates the greatest amount of the heat. During the spring and the first half of summer the upper layer accumulates more heat. The soil temperature depends significantly on the variability of the air temperature. Additionally the soil temperature is influenced also by sunshine duration and snowcover depth. The annual variability of the soil temperature can be approximated with the first harmonic. Below the depth of 185 cm, the inter-annual soil temperature oscillations do not exceed 0°C. There are positive tendencies in variability of mean soil temperature time series at all depths. At the depth of 10 cm this tendency has a character of a statistical trend. Its value is +0.126°C/year in the period 1979-1999.

2

Zmienność temperatury gruntu w Hornsundzie w okresie 1979-1999

88%

Miętus M. , Filipiak J.

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2001

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tom Z. 4

323-337

EN

In the paper the analysis of the variability of the soil temperature on the Polish polar station in Hornsund, situated in southwestern part of Spitsbergen, has been presented. The soil temperature data from the depths 5, 10, 20, 50 and 100 cm cover the period 1979-1999. In the annual cycle of the soil temperature variability the 8-month period, while the soil is frozen, can be observed. Positive values of temperature in the whole-analyzed profile occur only during the 3-month-lasting period from July to September. In the cool season the highest temperatures are recorded in the deeper layer, additionally the greatest values of the standard deviation in the considered depths are met. In the warm season the temperature decreases with the depth. During the spring and autumn, when the isothermal conditions in the soil profile are observed, the reversion of the temperature profile is recorded. The most thermally active layer is the upper one - deep to 20 cm. Reaction of deeper layers to the thermal processes above the ground and in the upper layers is weaker and time-delayed. The greatest differences of temperature between the lowest layer and the upper ones are recorded during the polar night. Air temperature significantly influences the variability of the soil temperature. The relationships between the soil temperature and the other meteorological elements i.e. sunshine duration, cloudiness, persistence of snow cover and its depth are not confirmed by the high values of correlation coefficients. The annual variability of the soil temperature can be approximated with the first harmonic. Below the depth of 184 cm maximum soil temperature do not exceed 0°C. In the whole examined profile the positive long-term tendencies of the temperature are observed, but the statistically significant trend (+0.126°C/year) occurs only on depth 10 cm.

3

Zróżnicowanie termiki gruntu na Równinie Kaffiöyra (NW Spitsbergen) w lecie 1997 i 1998 w porównaniu z okresem 1975-98

88%

Araźny A.

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2001

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tom nr 11

81-92

EN

The paper presents the results of soil temperature measurements on the Kaffiöyra Plain from the polar summer period 1997 (Tab. 1) and 1998 (Tab. 2) compared to the period 1975-1998 (Tab. 3). The soil temperature measurements were carried out on three ecotops: on the sandy beach, on end moraine of the Aavatsmark Glacier, and on tundra (Fig. 1). The measurements were taken daily at 01, 07, 13 and 19 LMT at depths: 1, 5, 10, 20 and 50 cm by soil thermometers. The thermal characteristics of soils at different ecotops differ by physical characteristics, moisture, degree of vegetation cover and thickness of active layer. The paper presents the question of thermal changes in the soil with general weather conditions. The 1997 summer was very wet, strong winds domination and mean sunshine. The 1998 summer, on the contrary, was more cloudy and warmer, and the atmosphere dynamics lower with rare light rainfall (Fig. 2, Tab. 4). The comparison of summer seasons was made for the common period 21 July - 31 August. The thermal changes of the soil on the Kaffioyra Plain are best illustrated by the data from the beach because observations at this stand were made during all of the expeditions. The mean temperature at all depth was the lowest in 1982 and 1997, the highest in 1985 and 1998 (Fig. 5). In the analysed period the measurement point on the beach was the coldest stand, tundra was warmer, and the stand on the moraine the warmest (Tab. 3, Fig. 4).

4

Spatial differentiation of ground temperature in the region of Arctowski Station, King George Island, Antarctica in 1996

75%

Kejna M. , Laska K.

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tom 20

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nr 3

221-241

5

Wykorzystanie gruntowego wymiennika ciepła na potrzeby wstępnego przygotowania powietrza wentylacyjnego

75%

Trząski A.

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2007

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tom nr 1

93-94

6

Wpływ właściwości termofizycznych gruntu na rozkład temperatury w gruncie

75%

Biernacka B.

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2010

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tom nr 8

329-334

PL

Artykuł poświęcony ocenie wpływu właściwości termofizycznych gruntu (gęstości, ciepła właściwego, przewodności cieplnej) na kształtujący się w nim rozkład temperatury. W publikacji porównano wyniki pomiarów otrzymane z dwóch stanowisk badawczych zlokalizowanych na terenie Białegostoku, różniących się strukturą i właściwościami fizycznymi gruntu. Temperaturę gruntu monitorowano przez 5 lat. Na podstawie uzyskanych wyników określono głębokość gruntu, poniżej której jego temperatura pozostaje praktycznie stała. Informacje te są niezwykle istotne przy projektowaniu wielu obiektów inżynierskich, takich jak np.: drogi, rurociągi, budynki, czy gruntowe wymienniki ciepła

EN

The paper deals with the influence of such soil properties as density, specyfic heat and thermal conductivity on temperature distribution in the ground. Experimental results obtained in two measuring points are compared. These points were located in Białystok and differed in structure and properties of soil. Ground temperature was monitored for 5 years. The depth of negligible ground temperature variations is determined. the results are very important for designers of such objects as roads, pipelines, buildings, ground heat exchangers etc.

7

Cel, metody i wybrane przykłady monitoringu środowiska na stacji badawczej przy Wydziale Geologii UW

51%

Małecka D. , Małecki J. J.

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2002

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tom Vol. 50, nr 10/2

1004-1008

EN

The paper presents a general review of methods concerning activity of the research station and characteristics of particular research stands. The way of gathering, processing and imput of data are shown on the selected examples. Importance of continuous monitoring of moisture gradient and temperature in the aeration zone is stressed. These parameters are essential for creating geochemical models. The results of experimental research conducted during three-step pumping tests of the Oligocene aquifer are discussed.