近40年中国北方农牧交错带气候时空分异特征

目的探讨中国北方农牧交错带气候时空分异特征。方法采用定量方法,分析近40年气温、降水的年与季节的变化特征及气候变化趋势;借助于GIS空间分析技术探讨研究区气候类型与气候时空分异特征。结果通过对气温、降水及气候类型的分析,得出研究区气候各因子及气候的空间分布规律。结论①中国北方农牧交错带包括7种气候类型,东、中、西部分别以中温带森林草原气候、暖温带大陆性森林草原气候和温带草原气候为主;②中国北方农牧交错带气温近40年有升高的趋势,冬季和夏季气温增加,春秋两季气温变化不大;③中国北方农牧交错带降水有减少的趋势,秋季降水减少明显,冬季降水基本不变,夏季和春季降水波动较大;④研究区气候变化在空间上可以划分为三大区域和4种类型。

Analysis on the spatial differentiation pattern of climate of the farming-pastoral zone in North China in the recent 40 years

Aim To reveal the spatial differentiation pattern of the farming-pastoral zone in North China.Methods Through the quantitative method,the temperature and precipitation and the climate trendy are analyzed.With the help of GIS technique the types of climate and the spatial differentiation pattern are discussed.Results Through analyzing the temperature and precipitation and the climate trendy,the spatial difference pattern of the climate and its factor are demonstrated.Conclusion The study area includes seven climate types,the east region is prevailingly controlled by the meso-temperate forest-to-steppe climate,while the middle region by the warm-temperate continental forest-to-steppe climate,and the west region by the temperate cold alpine grassland climate;In the recent 40 years,there has been a increase trend in temperature;The precipitation of study area has a decrease trend in the recent 40 years;Based on the analysis of the spatial pattern of climate,the study area is divided into three region and four climate trend types.