气候变暖背景下科尔沁沙地50年霜冻变化分析

为了研究气候变暖背景下自然灾害对科尔沁沙地沙漠化防治和农业生产的影响，为沙地的治理及农业结构调整提供气候依据。利用最典型地区的地面最低温度资料，分析了该地区近50年地面初、终霜冻出现日期和无霜冻期变化特征。结果表明：在全球气候变暖背景下，初霜冻出现日期变化趋势只略显推后，推后速率1.1天/10年；终霜冻出现日期提前趋势明显，提前速率3.4天/10年；无霜冻期呈延长趋势，延长速率4.5天/10年。初霜冻仍是当地仅次于干旱的主要气象灾害。

Climate Change Under the Background of Dim Horqin Sandy Land 50 Years Frost Change Analysis

In order to study climate change under the background of generate natural disasters on the prevention and control of desertification horqin sandy land and agricultural production and the effects for sand control and agricultural structure adjustment to provide climate basis, use the most typical area ground minimum temperature material, analyzes the nearly fifty years in the beginning and ending in frost date and no frost period variation characteristics. The results showed that： the global climate change under the background of dim, early frost date change trend appears only slightly delay, delay rate 1.1 days per 10 years. Final frost appear date trend obvious, advance rate 3.4 days per 10 years. No frost period is extended trend and prolong rate 4.5 days per 10 years. Initial frost is still the main meteorological disasters after the drought.