摘要： 由于气候条件的差异，内蒙古草原自东向西出现了由草甸草原、典型草原向荒漠草原和荒漠的过渡。气候变暖使内蒙古地区无霜期延长，积雪、冰雹、雷暴、大风、沙尘暴日数减少，降水量也出现由少转多的变化，对草原类型分布起决定性作用的湿润度几乎没有变化。近几年来草原退化、沙化的过程是伴随着草原开垦，植被遭到破坏的情况下形成的。1999-2001年连续高温干旱加剧了草原退化的进程，并在一定程度上改变了草原退化的趋势和格局。

关键词: 内蒙古, 草原, 生态环境, 气候因子

Abstract: There is a transition from grassy marshland grassland and typical grassland to deserted grassland and desert because of the difference of climate.And this change is from east to west in Inner Mongolia.The climate warming postponed frostless period,decreased snow,hailstone,thunderstorm,gale and day count of dust storm,increased rainfall.But it wasn't change humidity that determined the distribution of grassland genre nearly.A few years recently,grassland degeneration and deserted going with grassland assart and the instance of vegetation destroyed.High and continuum temperature accelerated the process of grassland degeneration,and in some degree changed its trend and pattern from 1999 to 2001.

Key words: Inner Mongolia, Grassland, Ecological Environment, Climate change

中图分类号: 

• S812.1

• S184

• X24