生态学报2018，Vol.38Issue(6)：1908-1919,12.DOI:10.5846/stxb201702260315
中国北方气候干湿变化及干旱演变特征
Climate dry-wet change and drought evolution characteristics of different dry-wet areas in northern China
摘要
Abstract
The Standardized Precipitation Index (SPI),standard deviations,and correlation analysis methods were adopted to explore temporal and spatial characteristics of dry and wet climatic changes in northern China using monthly precipitation data for the last 55 years (1960-2014) from 320 stations across 15 provinces.Furthermore,based on the Drought stations proportion and drought intensity,temporospatial characteristics of annual drought were also studied.The results showed that:(1) From 1960 to 2014,there was a general trend of northern China gradually becoming arid.The annual Drought stations proportion and drought intensity declined simultaneously.(2) Although there was a trend of increasing wetness in both spring and winter,it was more obvious in the winter.On the contrary,summer and autumn had a trend of becoming arid,which was more obvious in the summer.Summer precipitation was a determining factor for variation in annual dry-wet patterns.(3) Humid and semi-humid areas tended to become more arid,whereas arid and semi-arid areas had a wetting trend.The Drought stations proportion and drought intensity increased in humid and semi-humid areas,but decreased in arid and semi-arid areas.(4) Dry-wet climatic changes in northern China's eastern monsoon area (humid and semi-humid areas) and both sides of the boundaries of the monsoon area (semi-humid and semi-arid areas) had obviously synchronous fluctuation trends.However,there were opposite fluctuation trends in northern China's eastern monsoon area (humid and semi-humid areas) and arid areas in the western non-monsoon area of northern China.Summer had the same pattern,and dry-wet changes in four dry and wet areas in winter and spring also had synchronous fluctuation trends.关键词
北方地区/气候干湿区/干湿变化/标准化降水指数(SPI)Key words
northern China/dry and wet areas/dry-wet change/Standardized Precipitation Index (SPI)引用本文复制引用
胡子瑛,周俊菊,张利利,魏伟,曹建军..中国北方气候干湿变化及干旱演变特征[J].生态学报,2018,38(6):1908-1919,12.基金项目
国家自然科学基金项目(41261104) （41261104）
国家社科基金青年项目(12CTJ001) （12CTJ001）
