鄂托克旗近50年气候变化特征分析

利用鄂托克旗1963-2012年的气温、降水量和大风沙尘资料，采用滑动平均、趋势分析等方法，分析了鄂托克旗气温、降水量和大风沙尘变化特征。结果表明，近50年来鄂托克旗地区年平均气温呈波动上升趋势，增长倾向率为0．4℃／10年；降水量的年代变化不明显；年大风日数线性变化趋势较明显，随时间推移年大风日数以7．4d／lO年线性倾向率递减；年沙尘暴日数呈现波动减少趋势，特别是进入21世纪后，减少趋势明显。

Analysis on Climate Change of Etuoke County in Nearly 50 Years

Using moving average and trend analysis methods, the change characteristics of temperature, precipita- tion, wind and sandstorm were analyzed based on the data of Etuoke County from 1963 to 2012. The results showed that the annual average temperature of Etuoke County in nearly 50 years showed a fluctuating upward trend at a rate of 0.4 ℃/10 years. There was no obvious change in precipitation. The wind days showed a gradually decreas- ing trend, and the decline rate was 7.4 d/10 years. The sandstorm days showed a fluctuating decreasing trend, and de- creased significantly after entering the twenty-first century.