干旱区地理2024，Vol.47Issue(10)：1674-1687,14.DOI:10.12118/j.issn.1000-6060.2023.662
中国区域气候干湿与土壤湿度变化特征及其差异性分析
Difference of changing characteristics analysis between climate dry-wet and soil moisture in China
摘要
Abstract
Climatic dry-wet conditions are important indicators of climate characteristics,whereas soil dry-wet conditions are complex and multidimensional hydroclimatic concepts.There are significant differences and cer-tain consistencies between these conditions.Under the background of global warming,the evolution trends and differences of these conditions must be further studied.Thus,this paper analyzed the characteristics and differenc-es of climate dry-wet and soil moisture conditions in China and clarified their similarities and differences.There-fore,the overall climate dry-wet status and regional fluctuation were studied using the humidity index,and the soil dry-wet trends were analyzed in the same period.The results showed little change in the boundary line of dif-ferent climates in China over the past 60 years.However,compared with the climate state period from 1961 to 1990,there was a vast climate drying zone from west to east in the north of China and its humidity index had a slightly decreasing trend,but the variation did not necessitate changing the climate classification.The monthly variations of climate dry-wet and soil dry-wet conditions were different in each climate zone in China,and the consistencies of humid and semihumid zones were better than those of semiarid and arid zones.The monthly vari-ations of PET and precipitation differences in each climatic region in China were obviously different.For arid and semiarid regions,March-September and March-June were dry periods,respectively,and drought was more likely to occur in these periods.The semihumid climate area entered the water surplus stage from July to August,whereas the humid climate area,except for a few months,was basically in the water surplus state throughout the year.There were obvious differences between climate dry-wet changes and perennial soil moisture changes in China's land regions.The annual humidity index in different climate regions showed a slightly increasing trend,but most of the soil moisture showed a drying trend,especially the shallow soil in the plough layer,which showed a potentially increasing agricultural and pastoral drought risk in different climate regions of China.The results of this study can help us fully understand the relationship between climate dry-wet and soil dry-wet condi-tions and promote further studies on their relationships.Moreover,this study can strengthen the awareness of drought risk prevention and control and improve agricultural and pastoral drought resistance measures.关键词
气候干湿/土壤湿度/变化特征/差异性/中国Key words
climate dry-wet/soil moisture/change characteristics/difference/China引用本文复制引用
李春华,朱飙,杨金虎,刘晨汐,段欣妤,黄鹏程..中国区域气候干湿与土壤湿度变化特征及其差异性分析[J].干旱区地理,2024,47(10):1674-1687,14.基金项目
国家自然科学基金项目(42375039,42230611) （42375039,42230611）
中国气象局兰州干旱研究所干旱气象科学研究基金项目(IAM202208)资助 （IAM202208）
