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vol. 3, nr. 1 (2004)
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Vertical distribution of air temperature in the atmosphere layer near the ground in grassland sites in the Bydgoszcz region
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Wacław Roguski, Leszek Łabędzki, Wiesława Kasperska-Wołowicz
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Institute for Land Reclamation and Grassland Farming, Regional Research Centre, Al. Ossolińskich 12, 85-093 Bydgoszcz |
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vol. 3 (2004), nr. 1,
pp. 143-151
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abstract:
Investigations were carried up in three different grassland sites in the Bydgoszcz region: wet site on the fluvial soil in the Vistula valley (Grabowo), periodically dry on the peat-moorsh soil (Frydrychowo) and dry on the mineral-moorsh soil (Prądki) � both in the Notec river valley. The measurements carried up in Bydgoszcz (dry site on the mineral soil) were used for comparison. Meadow sites in valleys were colder then dry site on the mineral soil in Bydgoszcz. Among valley sites the wet one on the fluvial soil was the hottest site, dry one on the mineral-moorsh soil was colder and the periodically dry on the peat-moorsh soil was the coldest site. The differences of vertical distribution of air temperature were observed in the examined sites. In the valley grassland sites the mean daily air temperature at 2.0 m above the ground was higher than at 0.5 m. Maximum temperature in the mineral soil sites was higher at the level of 0.5 m than at 2.0 m. On the organic soil it was similar at both levels. Minimum temperature in wet and periodically dry sites was 0.7oC higher at the level of 2.0 m than at 0.5 m in the growing season. The examined sites differed in the minimum temperature more than in the maximum temperature. Minimum temperature at 0.05 m above the ground was the lowest in the dry site on the mineral-moorsh soil. The greatest differences between air temperature at 2.0 m and at 0.5 m were observed in the sites on mineral soils (in Bydgoszcz 3.1oC) and the lowest on the peat-moorsh soil at Frydrychowo (1.2oC).
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keywords:
air temperature, vertical distribution, soil-water site
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original in:
Polish
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