关键词: 气候变化, 0 cm地表温度, 天山北麓

Abstract:

Based on the monthly maximum and minimum ground surface temperature on 0 cm soil layer at 7 meteorological stations in northern piedmont of Tianshan Mountains during 1963-2010, the spatial and temporal distributions were analyzed by using the linear trend analysis, Mann-Kendall test and Morlet wavelets. The results showed that the spatial distribution of the maximum ground surface temperature decreased from west to east generally, the high value center was in Jinghe of Xinjiang. Meanwhile, the minimum ground surface temperature in central and western regions around Usu and Urumqi was higher than that in other places. In the past 48 years, the ground surface temperature showed a significantly increasing trend in the whole, and the linear climatic tendency rates of the minimum and maximum temperature was respectively 0.87 ℃/10 a and 0.46 ℃/10 a, but the fluctuation of the minimum ground surface temperature was much more than that of the maximum. In addition, the changes of seasonal ground surface temperature increased significantly during 1963-2010, and the warming trends in winter and autumn were holistically greater than in other seasons. The mutation of the minimum ground surface temperature occurred in 2002, while that of the maximum ground surface temperature didn’t pass the significance test. Meanwhile, the ground surface temperature being anomalous warmer occurred since 2006.

Key words: climate change, ground surface temperature, northern piedmont of Tianshan Mountains