关键词: 气候变化, 土地沙漠化, 影响, 晋西北

Abstract: Based on data of monthly temperature and precipitation from 5 representative meteorological stations in northwestern Shanxi province during the period of 1957—2006, the series of average temperature and precipitation of the whole year, winter half year and summer half year were established, and the changing features of temperature and precipitation and their impact on land desertification were analyzed. Results showed that climate tends to become warmer and arider in the area. The linear trend rates of average temperature for the whole year, winter half year and summer half year were 0.202 ℃/(10a), 0.2 ℃/(10a) and 0.132 ℃/(10a), respectively; It had gradual and periodical features for average temperature in the summer half year. The linear trend rates of precipitation for the whole year, winter half year and summer half year were -16.68 mm/(10a), 0.404 mm/(10a) and -14.95 mm/(10a), respectively. The reduction of annual precipitation resulted mainly from reduction of precipitation in summer; precipitation in winter increased in comparison with that in summer. The condition of precipitation reduces in summer and increases in winter can certainly slow the process of land desertification.

Key words: climate change, land desertification, impact, northwestern Shanxi province