欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
依据华北段农牧交错带1961-2010年气象资料,利用标准化降水指数（SPI）、Mann-Kendall检验等方法对研究区的气候变化特征进行了分析。结果显示：1）近50a来,华北段农牧交错带以1987年为界划分为两个时期,此前为冷期,此后为暖期。其年平均气温线性增温速率为0.35℃/10a,冬季增温最显著,其次为春季、秋季、夏季。气温在1993年发生突变。2）年降水量呈下降趋势,倾向率为-6.51mm/10a,夏季降水的减少对其贡献率最大。3）气温突变后,极端旱涝灾害事件减少,中旱灾害频率在增加,气候变化整体呈现暖干趋势。
英文摘要：
Relying on the meteorological data of farming-pastoral ecotone of North China from 1961 to 2010,the characteristics of climate change in research area were analyzed using standardized precipitation index（SPI）,Mann-Kendall test,etc.The results show that： 1）： In the last 50 years,the annual average temperature linear warming rate in farming-pastoral ecotone of North China was 0.35℃/10a,where winter warming was the most significant,followed by spring,fall and summer.1987 was the demarcation of the two periods,before was the cold period,followed by a warm period.Temperature mutated at the 1993.2）： The rate of annual precipitation declining tendency was-6.51mm/10a,summer precipitation reduce contributed mostly to the rate.3）：After the temperature mutation,extreme droughts and floods events were reduced,the medium drought disaster frequency increased,the overall climate change presented a warming and drying trend.
同期刊论文项目
同项目期刊论文
期刊信息
位置：