正蓝旗近50年气候变化特征分析

Analysis of Climate Change Characteristics of Zhenglan Banner in Recent 50 Years

摘要: 本文利用正蓝旗1960~2011年气温、降水资料，分析了近50年的气候变化特征。分析结果表明正蓝旗近50年气温呈显著的增温趋势，以1987年左右为界，气温从相对偏冷时期转变到了相对偏暖时期。四季气温中冬季增温速率最大。降水量总体呈微弱的降低趋势，但趋势不显著，四季降水变化中夏季降水有降低的趋势。

Abstract: Based on the Zhenglan Banner’s temperature and precipitation data in 1960-2011, the characteristics of climate change of recent 50 years in Zhenglan Banner were analyzed. The result showed that the temperature in Zhenglan Banner increasing significantly, changed from the relatively cool temperatures to the relatively warm temperatures in 1987 for the sector. The average temperature in winter increased with the biggest ratio. Precipitation showed a slight decrease trend, but the trend was not significant, seasonal changes in precipitation in summer rainfall have decreased.