Recent 45 years climate climate change and its effects on ecological environment on Hulunbeier sandy land
呼伦贝尔沙地45年来气候变化及其对生态环境的影响

By the methods of mathematical statistics and comparative analysis,this paper analyzed the recent 45 years meteorological data and the status of grassland desertification,degenerated area,and vegetation growth on Hulunbeier sandy land.Overall,the climate condition on Hulunbeier sandy land had a warming and drying trend.The air temperature increased with year,precipitation decreased,evaporation increased,and extreme weather events occurred more frequently,which made the area of mobile sand increased and the vegetation cover decreased.Satellite remote-sensing monitoring and general investigation of desertification over the country further indicated that the desertification on Hulunbeier sandy land was expanding,and the ecological environment was deteriorating.The decreased days with strong wind and sandstorm year after year would be beneficial to the ecological protection and construction of this area.Since the 1980s,the management of desertification has been strengthened by the local governments at all levels in desert regions,and the vegetation recovery was quite quickly on partial sandy land.