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Improvement of rootzone soil moisture estimation over the Tibetan Plateau based on the exponential filter model and Copernicus Climate Change Service (C3S) surface observations

文献类型：期刊论文

作者Song, Yuxi3,4; Su, Jianbin4,5; Mou, Tinghua2; Wen, Jun1; Zhu, Gaofeng3; Wu, Xiaojing6; Zheng, Donghai4
刊名JOURNAL OF HYDROLOGY
出版日期2025-12-01
卷号662页码:133882
关键词Exponential filter model Rootzone soil moisture Regionalization of model parameter C3S products Tibetan Plateau
ISSN号0022-1694
DOI10.1016/j.jhydrol.2025.133882
产权排序5
文献子类Article
英文摘要This study is the first attempt to assess and enhance the applicability of exponential filter (ExpF) model to estimate rootzone soil moisture (RZSM) across different climatic and land conditions over the Tibetan Plateau (TP). To this end, in situ soil moisture (SM) profile data collected from five regional-scale monitoring networks are firstly used for the model assessment at local scale. Then a random forest (RF) approach is adopted to regionalize the critical model parameter (i.e. characteristic time length T) to enhance the estimation of RZSM at plateau scale using satellite-based surface SM (SSM) data from the Copernicus Climate Change Service (C3S). Results indicate that with increasing soil depth, the application accuracy of the ExpF model decreases due to weakened coupling strength between the SSM and RZSM, while the T values and their spatial heterogeneity increase due to greater variability in hydraulic connectivity between the SSM and RZSM across different monitoring sites. From the arid west TP to the semi-arid and humid east TP, the application accuracy of the ExpF model increases, while the variability in model accuracy across different monitoring sites shows a decreasing trend. The spatial distribution of regionalized T values at shallower depth is opposite to that of sand content, with higher values in the northwest TP and lower values in the Qaidam basin and central TP. For the deeper depth, higher values are also noted in the southeast TP due to the increasingly significant impact of meteorological and vegetation factors. The RZSM estimations based on the ExpF model with the regionalized T values capture better the observed dynamics and largely resolve the deficiencies noted for the C3S-based RZSM product. Above findings confirm the applicability of the ExpF model on the TP, offering valuable insights into enhancing the accuracy of RZSM estimations based on the satellite-based SSM products.
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WOS关键词NEAR-SURFACE ; ERS SCATTEROMETER ; MULTIPLE DEPTHS ; ZONE ; ASSIMILATION ; VALIDATION ; SATELLITE ; NETWORK ; RETRIEVALS ; DATASET
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:001539704900004
出版者ELSEVIER
源URL[http://ir.igsnrr.ac.cn/handle/311030/215635]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Wu, Xiaojing; Zheng, Donghai
作者单位1.Chengdu Univ Informat Technol, Sch Atmospher Sci, Plateau Atmosphere & Environm Key Lab Sichuan Prov, Chengdu 610000, Peoples R China;
2.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China;
3.Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China;
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Natl Tibetan Plateau Data Ctr, State Key Lab Tibetan Plateau Earth Syst Environm, Beijing 100101, Peoples R China;
5.Nanjing Normal Univ, Key Lab Virtual Geog Environm, Minist Educ PRC, Nanjing 210023, Peoples R China
6.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China;
推荐引用方式
GB/T 7714		 Song, Yuxi,Su, Jianbin,Mou, Tinghua,et al. Improvement of rootzone soil moisture estimation over the Tibetan Plateau based on the exponential filter model and Copernicus Climate Change Service (C3S) surface observations[J]. JOURNAL OF HYDROLOGY,2025,662:133882.
APA Song, Yuxi.,Su, Jianbin.,Mou, Tinghua.,Wen, Jun.,Zhu, Gaofeng.,...&Zheng, Donghai.(2025).Improvement of rootzone soil moisture estimation over the Tibetan Plateau based on the exponential filter model and Copernicus Climate Change Service (C3S) surface observations.JOURNAL OF HYDROLOGY,662,133882.
MLA Song, Yuxi,et al."Improvement of rootzone soil moisture estimation over the Tibetan Plateau based on the exponential filter model and Copernicus Climate Change Service (C3S) surface observations".JOURNAL OF HYDROLOGY 662(2025):133882.

入库方式： OAI收割

来源：地理科学与资源研究所

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