中文摘要：

为了解呼伦湖地区的气候变化特征及其对呼伦湖水域面积和水位的影响,采用一元回归方程和Spearman分析法分析了18年来（1991-2009）呼伦湖地区的气象资料和水域面积的变化。结果表明：近18年来,呼伦湖地区呈现均温上升,降水量下降,蒸发量上升的暖干化趋势,秋季温度上升显著,成为影响均温升高的主要因素,且该区域呈现出冬季气温逐渐下降,夏半年气温逐年升高的两极化趋势;近18年来,呼伦湖水域面积和水位不断下降,且自2000年以后下降速度明显加快,温度和蒸发量的上升成为影响水域面积和水位变化的主要因素。由此可知,秋季温度的显著升高成为影响呼伦湖变化的主要因素。

英文摘要：

In order to understand the characteristics of climate change in Hulun lake area and its effect on water area and water level of Hulun lake,using regression equation and Spearman analysis method to analyze the data of climate and change of water area during 1991- 2009 in this area. The results showed that in recent 18 years,there was a warming trend that showed average temperature increased,precipitation decreased and evaporation increased; average temperature of fall increased significantly,which was the key factor affecting the average temperature. The average temperature showed a polarization trend that winter got colder and summer got hotter; water area and water level of Hulun lake decreased continuously in recent 18 years,and the decreasing rate accelerated obviously since 2000,the increasing temperature and evaporation were the main factors that affected the changes of water area and water level. Above all,significant increasing of fall average temperature was the main factor,which affected the changes of Hulun lake.