Comprehensive assessment of Fengyun-3 satellites derived soil moisture with in-situ measurements across the globe

doi:10.1016/j.jhydrol.2020.125949

	Comprehensive assessment of Fengyun-3 satellites derived soil moisture with in-situ measurements across the globe
	Liu, Yangxiaoyue 1,4; Zhou, Yuke 2; Lu, Ning 2; Tang, Ronglin 2; Liu, Naijing 3; Li, Yong 1,4; Yang, Ji 1,4; Jing, Wenlong 1,4; Zhou, Chenghu 2
刊名	JOURNAL OF HYDROLOGY
	2021-03-01
卷号	594 页码:18
关键词	Fengyun-3 satellites Soil moisture Integrity Accuracy Evaluation
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2020.125949
通讯作者	Lu, Ning(lvn@lreis.ac.cn)
英文摘要	Soil moisture plays a pivotal role in terrestrial water circulation, energy transfer, and mass exchange. The X-band radiometer on-board Fengyun-3B and -3C satellites have been used for soil moisture retrieval since 2011. In this study, the spatial and temporal integrity of all available Fengyun-3 series soil moisture products were evaluated, and the data accuracy was validated against four in-situ measurements ascertained globally. The validation results reveal that: (1) The ascending Fengyun-3B soil moisture retrievals express higher spatial coverage percentages than others, and a higher temporal coverage percentage appears at 20-60 degrees N and 20-50 degrees S in summer. (2) The soil moisture products derived from both Fengyun-3B and -3C satellites reveal superior goodness of fit and smaller bias in the northern hemisphere in-situ measurements than in the southern hemisphere. In particular, the satellite retrieved pixel scale soil moisture datasets possesses a better correlation to small scale networks with densely distributed stations. In the southern hemisphere, the bias was positively correlated with the vegetation index and negatively correlated to land surface temperature, and this regularity may act as a reference for Fengyun-3 soil moisture correction. Moreover, the Fengyun-3 soil moisture products reveal positive responses to precipitation, and the memory of soil moisture to precipitation could last for at least 5 days. (3) The X-band signals were gradually impacted by increasing vegetation optical depth, leading to obvious overestimations. Further corrections, including hardware and software, are urgently required to enhance the anti-interference and robustness of the X-band signal.
资助项目	National Postdoctoral Program for Innovative Talents, China ; Open Research Fund of National Earth Observation Data Center, China ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0301] ; GDAS' Project of Science and Technology Development[2020GDASYL-20200103006] ; GDAS' Project of Science and Technology Development[2018GDASCX-0905] ; GDAS' Project of Science and Technology Development[2016GDASRC-0211] ; GDAS' Project of Science and Technology Development[2017GDASCX-0601] ; GDAS' Project of Science and Technology Development[2017GDASCX-0801] ; GDAS' Project of Science and Technology Development[2018GDASCX-0403] ; GDAS' Project of Science and Technology Development[2019GDASYL-0301001] ; GDAS' Project of Science and Technology Development[2019GDASYL-0501001] ; GDAS' Project of Science and Technology Development[2019GDASYL0502001]
WOS关键词	CHINA PLAIN ; WORLD MAP ; RETRIEVAL ; PRODUCTS ; WATER ; SMAP ; PRECIPITATION ; VALIDATION ; VEGETATION ; CLIMATE
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000641589600056
资助机构	National Postdoctoral Program for Innovative Talents, China ; Open Research Fund of National Earth Observation Data Center, China ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; GDAS' Project of Science and Technology Development
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162535]
专题	中国科学院地理科学与资源研究所
通讯作者	Lu, Ning
作者单位	1.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 3.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China 4.Guangdong Acad Sci, Guangzhou Inst Geog, Key Lab Guangdong Utilizat Remote Sensing & Geog, Guangdong Open Lab Geospatial Informat Technol &, Guangzhou 510070, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yangxiaoyue,Zhou, Yuke,Lu, Ning,et al. Comprehensive assessment of Fengyun-3 satellites derived soil moisture with in-situ measurements across the globe[J]. JOURNAL OF HYDROLOGY,2021,594:18.
APA	Liu, Yangxiaoyue.,Zhou, Yuke.,Lu, Ning.,Tang, Ronglin.,Liu, Naijing.,...&Zhou, Chenghu.(2021).Comprehensive assessment of Fengyun-3 satellites derived soil moisture with in-situ measurements across the globe.JOURNAL OF HYDROLOGY,594,18.
MLA	Liu, Yangxiaoyue,et al."Comprehensive assessment of Fengyun-3 satellites derived soil moisture with in-situ measurements across the globe".JOURNAL OF HYDROLOGY 594(2021):18.