干旱区生态环境知识资源中心(Arid): Evaluation of reanalysis soil moisture products using cosmic ray neutron sensor observations across the globe

Arid

DOI	10.5194/hess-28-1999-2024
	Evaluation of reanalysis soil moisture products using cosmic ray neutron sensor observations across the globe
	Zheng, Yanchen; Coxon, Gemma; Woods, Ross; Power, Daniel; Rico-Ramirez, Miguel Angel; McJannet, David; Rosolem, Rafael; Li, Jianzhu; Feng, Ping
通讯作者	Zheng, YC
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
EISSN	1607-7938
出版年	2024
卷号	28 期号:9 页码:1999-2022
英文摘要	Reanalysis soil moisture products are valuable for diverse applications, but their quality assessment is limited due to scale discrepancies when compared to traditional in situ point-scale measurements. The emergence of cosmic ray neutron sensors (CRNSs) with field-scale soil moisture estimates ( similar to 250 m radius, up to 0.7 m deep) is more suitable for the product evaluation owing to their larger footprint. In this study, we perform a comprehensive evaluation of eight widely used reanalysis soil moisture products (ERA5-Land, CFSv2, MERRA2, JRA55, GLDAS-Noah, CRA40, GLEAM and SMAP L4 datasets) against 135 CRNS sites from the COSMOS-UK, COSMOS-Europe, COSMOS USA and CosmOz Australia networks. We evaluate the products using six metrics capturing different aspects of soil moisture dynamics. Results show that all reanalysis products generally exhibit good temporal correlation with the measurements, with the median temporal correlation coefficient ( R ) values spanning 0.69 to 0.79, though large deviations are found at sites with seasonally varying vegetation cover. Poor performance is observed across products for soil moisture anomalies time series, with R values varying from 0.46 to 0.66. The performance of reanalysis products differs greatly across regions, climate, land covers and topographic conditions. In general, all products tend to overestimate data in arid climates and underestimate data in humid regions as well as grassland. Most reanalysis products perform poorly in steep terrain. Relatively low temporal correlation and high bias are detected in some sites from the west of the UK, which might be associated with relatively low bulk density and high soil organic carbon. Overall, ERA5-Land, CRA40, CFSv2, SMAP L4 and GLEAM exhibit superior performance compared to MERRA2, GLDAS-Noah and JRA55. We recommend that ERA5-Land and CFSv2 could be used in humid climates, whereas SMAP L4 and CRA40 perform better in arid regions. SMAP L4 has good performance for cropland, while GLEAM is more effective in shrubland regions. Our findings also provide insights into directions for improvement of soil moisture products for product developers.
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:001214907900001
WOS关键词	IN-SITU ; WATER CONTENT ; SCALE EVALUATION ; 22 PRECIPITATION ; SATELLITE ; SURFACE ; ASSIMILATION ; CALIBRATION ; SYSTEM ; SMOS
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404128
推荐引用方式 GB/T 7714	Zheng, Yanchen,Coxon, Gemma,Woods, Ross,et al. Evaluation of reanalysis soil moisture products using cosmic ray neutron sensor observations across the globe[J],2024,28(9):1999-2022.
APA	Zheng, Yanchen.,Coxon, Gemma.,Woods, Ross.,Power, Daniel.,Rico-Ramirez, Miguel Angel.,...&Feng, Ping.(2024).Evaluation of reanalysis soil moisture products using cosmic ray neutron sensor observations across the globe.HYDROLOGY AND EARTH SYSTEM SCIENCES,28(9),1999-2022.
MLA	Zheng, Yanchen,et al."Evaluation of reanalysis soil moisture products using cosmic ray neutron sensor observations across the globe".HYDROLOGY AND EARTH SYSTEM SCIENCES 28.9(2024):1999-2022.