desert-oasis ecotone, soil temperature, variation characteristic, Linze, Hexi Corridor ,"/> Variation of Soil Temperature in the Desert-Oasis Ecotone

Arid Zone Research ›› 2019, Vol. 36 ›› Issue (4): 809-815.

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Variation of Soil Temperature in the Desert-Oasis Ecotone

GOU Qian-qian1, LI Qiao-qiao1, 3, QU Jian-jun2, WANG Guo-hua1   

  1. 1. College of Geographic Sciences, Shanxi Normal University, Linfen 041004, Shanxi, China;
    2. Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China;
    3. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, Gansu, China

  • Received:2018-10-12 Revised:2019-01-12 Online:2019-07-15 Published:2019-07-15

Abstract: In this study, the data of soil temperature and meteorological factors at a station in an inland river basin in Linze from 2004 to 2014 were used to analyze the soil temperature variation and its main affecting factors in the desert-oasis ecotone in central Hexi Corridor. The results showed that both the daily and monthly changes of soil temperature were sine-curve-shaped, and the occurrence time of the highest and lowest temperature in each soil layer was gradually delayed with the increase of soil depth. The average annual soil temperature was generally decreased at first and then increased with the increase of soil depth. The correlation between air temperature and soil temperature was the most significant. Three distinct layers of soil temperature in this region were defined, i.e., the soil layers of 0-20 cm deep, around 40 cm deep and 60-100 cm deep. Finally, the empirical prediction equations between meteorological indexes and soil temperature of each soil layer were developed using the correlation analysis and the multiple stepwise linear regression.

Key words: desert-oasis ecotone')">

desert-oasis ecotone, soil temperature, variation characteristic, Linze, Hexi Corridor