本溪农业气候资源的变化特征分析

目的]分析本溪农业气候资源的变化特征。方法]对本溪地区1953-2005年平均温度、降水和日照等的变化特征进行统计分析。结果]结果表明，本溪气候呈变暖趋势，特别是20世纪90年代以来升温明显，冬季对气候变暖季贡献最大；降水为减少趋势，从1975年开始降水减少明显；日照也呈减少趋势。进一步分析，发现气候变暖导致干旱事件发生的频率增加；降水虽然呈减少趋势，但暴雨次数增加，说明降水强度发生了变化，灾害造成的经济损失在增大。初霜延后，终霜提前，无霜期延长，积温增加明显。结论]本溪农业气候资源变化必将影响该地农业生产的布局和产业结构的调整。

Analysis on Characteristis of Agricultural Climate Resources in Benxi

Objective] The purpose of this reseaarch was to analyze the variation characteristis of agricultural climate resources in Benxi.Method] Baesd on average temperature,precipitation and sunshine and other information from 1953 to 2005 in Benxi,the changing characteristics were studied with statistical analysis.Result] The results showed that the climate was warming trend in Benxi,especially warming clearly since the 1990s,the warming quarter biggest contribution in winter;the precipitation trends reducing,the rainfall to reduce significantly from 1975,Sunshine also showed decreasing trend.Further analysis found that warming led to drought increased the frequency of the incident.Although having decreased trend of precipitation,heavy rain has increased the number of changes that there was a change in precipitation intensity,the losses caused by disasters in the increase.The early frost delay,end early frost,frost-free period extended temperature in increasing markedly.Conclusion] These changes will affect the agricultural production layout and structural adjustment in Benxi.