气象科学2026，Vol.46Issue(2)：184-194,11.DOI:10.12306/2025jms.0025
华中地区CLDAS土壤湿度产品评估及校验技术研究
Evaluation and validation techniques of CLDAS soil moisture products in central China
摘要
Abstract
This study evaluates the accuracy and applicability of CLDAS-simulated volumetric water content in Central China for 2019,assessing temporal,regional,and depth consistency.Based on these evaluations,a consistency verification technique was developed by comparing observations with model outputs.Results indicate that CLDAS effectively captures the temporal variation of volumetric water content,maintaining relatively stable consistency across months.The smallest mean error occurs in June,while larger errors are noted in August.Root mean square error and standard deviation of deviation remain consistent across months,with the highest correlation observed in September and lower correlation in July.Regionally,CLDAS show a gradual increase in volumetric water content from north to south,generally aligning with observations.However,underestimations are evident in central and northern Henan Province,while simulations perform well in eastern Hubei Province and western and southern Hunan Province.Depth-wise,the CLDAS tends to overestimate water content in the 10-40 cm layer and underestimate it in the 50-100 cm layer.As depth increases,systematic bias uncertainty rises,and correlation gradually decreases.The consistency verification technique effectively identifies abrupt changes in observational data caused by equipment failures,sensor calibration drift,irrigation,and other factors.关键词
CLDAS/土壤体积含水量/华中地区/适用性评估/校验技术Key words
CLDAS/volumetric water content/central China/applicability evaluate/validation techniques分类
农业科技引用本文复制引用
王彦霏,李翠娜,庞少博,支亚京,梁如意,王硕飞..华中地区CLDAS土壤湿度产品评估及校验技术研究[J].气象科学,2026,46(2):184-194,11.基金项目
河北省气象局科研开发项目(23zc06) （23zc06）
