干旱区地理2025，Vol.48Issue(4)：612-622,11.DOI:10.12118/j.issn.1000-6060.2024.480
内蒙古不同干湿区潜在蒸散发变化特征及主导因子分析
Changes characteristics and dominant factors of potential evapotranspiration in different dry and wet zones of Inner Mongolia
摘要
Abstract
The analysis of the spatial and temporal variations in potential evapotranspiration and its sensitivity to meteorological factors in different dry and wet zones is essential for optimizing water resource management in ag-riculture,animal husbandry,forestry,and water resource planning and allocation,as well as for predicting the im-pact of climate change on water resources.Given the diverse dry and wet conditions and climatic conditions in In-ner Mongolia,China,a region significantly affected by climate change,the sensitivity coefficients of potential evapotranspiration to air temperature,wind speed,water vapor pressure,and sunshine hours were calculated based on the Penman-Monteith formula of the FAO for 76 meteorological stations in Inner Mongolia from 1961 to 2023.The dominant factors influencing potential evapotranspiration in different dry and wet zones and its quantitative response to climate change were investigated.The results indicate that:(1)Spatially,potential evapo-transpiration generally decreases from west to east in the longitudinal direction and from south to north in the lati-tudinal direction.In arid and semi-arid zones,the trend in potential evapotranspiration is not pronounced,where-as in semihumid zones,an increasing trend is observed.(2)The sensitivity of potential evapotranspiration to mete-orological factors follows this order:maximum air temperature is the most sensitive factor,followed by water va-por pressure,wind speed,and minimum air temperature,with sunshine hours being the least sensitive.(3)The sensitivity coefficients of all meteorological factors exhibit consistent trends across different dry and wet zones.The temperature sensitivity coefficient and vapor pressure sensitivity coefficient show a decreasing trend,where-as the wind speed sensitivity coefficient and sunshine hours sensitivity coefficient display an increasing trend,with significant changes observed for the water vapor pressure sensitivity coefficient and wind speed sensitivity coefficient.(4)Maximum and minimum air temperatures contribute positively to changes in potential evapotrans-piration,whereas wind speed,water vapor pressure,and sunshine hours contribute negatively.Among these,sun-shine hours have the least influence on potential evapotranspiration in all dry and wet zones.Wind speed is the dominant factor driving potential evapotranspiration changes in arid and semi-arid zones,while maximum air tem-perature is the dominant factor in semihumid zones.关键词
潜在蒸散发/敏感系数/主导因子/干湿区/内蒙古Key words
potential evapotranspiration/sensitivity analysis/dominant factor/dry and wet zones/Inner Mon-golia引用本文复制引用
王志春,王彦平,徐震宇,薛文超..内蒙古不同干湿区潜在蒸散发变化特征及主导因子分析[J].干旱区地理,2025,48(4):612-622,11.基金项目
国家自然科学基金项目(41665007) （41665007）
内蒙古自然科学基金项目(2024LHMS04020)资助 （2024LHMS04020）
