干旱区生态环境知识资源中心(Arid): Surface soil moisture retrieval using multi-temporal Sentinel-1 SAR data in karst rocky desertification area

Arid

DOI	10.11972/j.issn.1001-9014.2020.05.014
	Surface soil moisture retrieval using multi-temporal Sentinel-1 SAR data in karst rocky desertification area
	Chen Quan; Zhou Zhong-Fa; Wang Ling-Yu; Dan Yu-Sheng; Tang Yun-Tao
通讯作者	Zhou, ZF
来源期刊	JOURNAL OF INFRARED AND MILLIMETER WAVES
ISSN	1001-9014
出版年	2020
卷号	39 期号:5 页码:626-634
英文摘要	Soil moisture is the core component that links the earth's surface water cycle, energy cycle and biogeochemical cycle, and it is also the key parameter to study the ecosystem in karst rocky desertification area. The aim of this study was to retrieve the soil moisture with multi-temporal Sentinel-1 C-band SAR data and observation equations were constructed by using the Alpha approximation model over karst rocky desertification area. The spatial and temporal variation characteristics and the error influencing factors of the soil moisture retrieval results were analyzed. It is found that the overall change trend of soil moisture in the observation period is highly consistent with the trend of rainfall change. The maximum value of soil moisture and the degree of spatial heterogeneity in karst rocky desertification area is significantly higher than those in non-rocky desertification area. The results were validated using ground measurements of one acquisition date, with root mean squared error (RMSE) value of 0. 059 cm(3)/cm(3) and mean bias value of 0. 026 cm(3)/cm(3). The method of retrieval of soil moisture by Alpha approximate model is applicable to karst rocky desertification area, the mixed pixel problem caused by the surrounding complex habitat conditions of the surface soil is the main influencing factor of inversion error. These results can provide reference to obtaining soil moisture under mountain complex environment by multi-temporal observation method, and provide support for ecosystem restoration and ecological industry development in karst rocky desertification area.
英文关键词	soil moisture synthetic aperture radar multi-temporal inversion karst rocky desertification
类型	Article
语种	中文
收录类别	SCI-E
WOS记录号	WOS:000581069300013
WOS关键词	INVERSION ; MICROWAVE ; MODEL
WOS类目	Optics
WOS研究方向	Optics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327024
作者单位	[Chen Quan; Zhou Zhong-Fa; Wang Ling-Yu; Dan Yu-Sheng; Tang Yun-Tao] Guizhou Normal Univ, Sch Karst Sci, Sch Geog & Environm Sci, Guiyang 550001, Peoples R China; [Chen Quan; Zhou Zhong-Fa; Wang Ling-Yu; Dan Yu-Sheng; Tang Yun-Tao] State Key Lab Incubat Base Karst Mt Ecol Environm, Guiyang 550001, Peoples R China; [Chen Quan; Zhou Zhong-Fa; Wang Ling-Yu; Dan Yu-Sheng; Tang Yun-Tao] State Engn Technol Inst Karst Desertificat Contro, Guiyang 550001, Peoples R China
推荐引用方式 GB/T 7714	Chen Quan,Zhou Zhong-Fa,Wang Ling-Yu,et al. Surface soil moisture retrieval using multi-temporal Sentinel-1 SAR data in karst rocky desertification area[J],2020,39(5):626-634.
APA	Chen Quan,Zhou Zhong-Fa,Wang Ling-Yu,Dan Yu-Sheng,&Tang Yun-Tao.(2020).Surface soil moisture retrieval using multi-temporal Sentinel-1 SAR data in karst rocky desertification area.JOURNAL OF INFRARED AND MILLIMETER WAVES,39(5),626-634.
MLA	Chen Quan,et al."Surface soil moisture retrieval using multi-temporal Sentinel-1 SAR data in karst rocky desertification area".JOURNAL OF INFRARED AND MILLIMETER WAVES 39.5(2020):626-634.