近20 a中国中东部部分农业区土壤水分变化  

Changes in soil moisture in parts of the central and eastern agricultural regions of China in the recent 20 years

作　　者：吴振宗 毕健 高艺菲 杨通 WU Zhen-zong;BI Jian;GAO Yi-fei;YANG Tong(College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学资源环境学院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2022年第6期774-781,788,共9页Journal of Lanzhou University(Natural Sciences)

基　　金：兰州大学“双一流”建设科研启动费项目。

摘　　要：使用GLEAM、ERA5-Land土壤水分数据集,分析2001-2020年中国中东部农业区土壤水分的年际动态,使用降水、增强型植被指数、植被蒸腾等数据探讨可能的原因.结果表明,近20 a来,部分地区土壤水分有下降趋势,深层土壤水分下降趋势比浅层土壤水分下降更为明显.随着土壤深度的增加,土壤水分与降水的相关性逐渐降低.土壤水分下降地区的年降水量有所减少,植被绿度和植被蒸腾显著上升,说明降水量的降低以及植被耗水的增加可能是导致中国中东部部分农业区土壤水分下降的原因.This study used the soil moisture datasets of GLEAM(the global land evaporation amsterdam model)and ERA5-Land(the land component of the fifth generation of European reanalysis)to study the interannual dynamics of soil moisture in agricultural regions of central and eastern China from 2001 to2020.Precipitation,enhanced vegetation index,vegetation transpiration and other data were employed to explore the possible reasons therein.The results showed that the soil moisture in some regions manifested a decreasing trend in the past 20 years,and deep soil moisture decreased more seriously than surface soil moisture.The correlation between soil moisture and precipitation decreased with the increase in the soil depth.The annual precipitation decreased in regions where soil moisture decreased,while vegetation greenness and transpiration increased,indicating that the decrease in soil moisture in part of the central and eastern agricultural regions of China might have been caused by the decrease in precipitation and the increase in vegetation water consumption.

关 键 词：土壤水分 降水 植被蒸腾 农业 全球变化 

分 类 号：S157.1[农业科学—土壤学]