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Qinghai-Xizang Plateau Soil Moisture Modeling Dataset (2015-2100)


SONG Qian1LIU Yangxiaoyue*2XU Hongzhao3ZHANG Huifang4ZHU Guili4FU Xiaopeng4
1 Beijing Forestry University,Beijing 100101,China2 Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China3 The Second Geological Brigade of the Tibet Autonomous Region Bureau of Geology and Mineral Exploration and Development,Lhasa 850000,China4 Monitoring Center for Ecological Environment of Tibet Autonomous Region,Lhasa 850000,China

DOI:10.3974/geodb.2025.10.05.V1

Published:Oct. 2025

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Key Words:

Qinghai-Xizang Plateau,surface soil moisture,future multi-scenario,random forest,fusion

Abstract:

The Qinghai-Xizang Plateau surface monthly soil moisture modeling dataset was developed covering the period from 2015 to 2100 with a spatial resolution of 0.1°x0.1°. Firstly, ground-based observations from the MAQU, NAQU, and NGARI networks were used to evaluate the accuracy of 21 CMIP6 soil moisture datasets, along with SMAP and ERA5-Land products, using bias, correlation coefficient (R), root mean square error (RMSE), and unbiased RMSE (ubRMSE). Meanwhile, the Enhanced Triple Collocation (ETC) method was employed to obtain random error standard deviation (RESD) and correlation coefficient (CC), based on which four Earth system models were selected for integration. Secondly, SMAP and ERA5-Land datasets were fused using differential weighting guided by the ETC evaluation results, and the optimal fusion result was identified. Finally, a Random Forest algorithm was used to integrate multiple sources of explanatory variables for monthly model training, and the model’s prediction accuracy was validated against in-situ observations. The dataset includes: (1) monthly soil moisture data from 2015 to 2100 under four Shared Socioeconomic Pathways (SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5), with 0.1° spatial resolution; (2) monthly in-situ measurements (0-0.1 m depth) from the MAQU, NAQU, and NGARI networks. The dataset is archived in .mdd, .tif, .shp, and .csv formats, consisting of 4,838 data files with data size of 0.99 GB (compressed into 1 file with data size of 315 MB). The data results show that compared to the original CMIP6 model outputs, the fused product achieves significantly higher accuracy and lower error, demonstrating improved capability in representing soil moisture dynamics over the Qinghai-Xizang Plateau.

Foundation Item:

National Natural Science Foundation of China (42571539)

Data Citation:

SONG Qian, LIU Yangxiaoyue*, XU Hongzhao, ZHANG Huifang, ZHU Guili, FU Xiaopeng. Qinghai-Xizang Plateau Soil Moisture Modeling Dataset (2015-2100)[J/DB/OL]. Digital Journal of Global Change Data Repository, 2025. https://doi.org/10.3974/geodb.2025.10.05.V1.

References:


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     [12] Fu, P. F., Yang, X. J., Jiang, B., et al. Construction and application of a high-resolution soil moisture simulation model integrating multi-source data [J]. Transactions of the Chinese Society of Agricultural Engineering, 2025, 41(5): 96-106.
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Data Product:

ID Data Name Data Size Operation
1 QZP_RF_SoilMoisture_2015-2100.rar 323040.90KB
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