Climate changes analysis in the Inner Mongolia desert grassland based on GIS

In order to quantitative analyze the climate variation characters and tendency of Inner Mongolia desert steppe at different time scales, the present research employed monthly average temperature, precipitation and average wind speed from 9 meteorological stations around desert steppe area and surrounding regions during 1961-2011 to understand the basic climate of desert steppe and diagnose the yearly and monthly variations tendency and degree of the above 3 factors. The results showed the mean annual temperature of Inner Mongolia desert steppe significantly increased in the 1990s, increased by 2.7 ℃ after 2000 in the western region, increased by 4 ℃ in February. The annual precipitation has no significant variations with the yearly 5% changes in most regions, however, the winter precipitation increased significantly in northern and south-central and the spring and autumn precipitation decreased in the west. The annual mean wind speed slowed down by 0.1~1.4 m·s-1 since the 1980s, and it slowed down more in spring and winter.