干旱区生态环境知识资源中心(Arid): Identifying Soil Freeze/Thaw States Using Scattering and Coherence Time Series of High-Resolution C-Band Synthetic Aperture Radar in the Qinghai-Tibet Plateau

Arid

DOI	10.1109/JSTARS.2021.3137187
	Identifying Soil Freeze/Thaw States Using Scattering and Coherence Time Series of High-Resolution C-Band Synthetic Aperture Radar in the Qinghai-Tibet Plateau
	Zhou, Xin; Zhang, Zhengjia; Shen, Qikai; Chen, Qihao; Liu, Xiuguo
通讯作者	Zhou, X (corresponding author)，China Univ Geosci, Sch Geog & Informat Engn, Wuhan 430074, Peoples R China.
来源期刊	IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
ISSN	1939-1404
EISSN	2151-1535
出版年	2022
卷号	15
英文摘要	The soil freeze/thaw (F/T) cycles play an important role in the climate system and human activities. However, the harsh environment in the Qinghai-Tibet Plateau (QTP) poses great challenges for both in-situ observation and remote-sensing monitoring of the soil F/T process. In this article, the time series of scattering and coherence of the high-resolution Sentinel-1 C-band synthetic aperture radar (SAR) is analyzed to identify the soil F/T state. The time series of scattering, including intensity and decomposition parameters, and coherence, are analyzed based on three typical landcover types (i.e., desert, grassland, and meadow) in the QTP. They are given the mathematical description by second-order and fourth-order Fourier functions, respectively. Based on Fourier functions, the initial F/T time points of the soil are detected in each pixel to draw the F/T map of the entire study area. The experiment results are cross-validated with the initial F/T time points of the soil calculated from the MODIS land surface temperatures, showing that the differences in days are less than one revisit cycle of Sentinel-1 (i.e., 12 days). Furthermore, the possible impacts of environmental factors acquired from the Wudaoliang meteorological station, including air temperature, ground surface temperature, snow depth, and precipitation, on scattering and coherence are discussed. This study explores that Sentinel-1 has great potential for soil F/T monitoring in the QTP, which can indicate F/T states of the surface soil as well as F/T information of the deeper soil with a high spatial-temporal resolution.
英文关键词	Soil Synthetic aperture radar Scattering Monitoring Remote sensing Time series analysis Snow Coherence Qinghai-Tibet Plateau (QTP) scattering Sentinel-1 soil freeze thaw (F T) cycle synthetic aperture radar (SAR) time series
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000739632400002
WOS关键词	NASA SCATTEROMETER NSCAT ; NORTHERN-HEMISPHERE ; PERMAFROST ; FROZEN ; LANDSCAPE ; SURFACE ; CLASSIFICATION ; VARIABILITY ; CYCLES ; MODIS
WOS类目	Engineering, Electrical & Electronic ; Geography, Physical ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Engineering ; Physical Geography ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376827
作者单位	[Zhou, Xin; Zhang, Zhengjia; Shen, Qikai; Chen, Qihao; Liu, Xiuguo] China Univ Geosci, Sch Geog & Informat Engn, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Xin,Zhang, Zhengjia,Shen, Qikai,et al. Identifying Soil Freeze/Thaw States Using Scattering and Coherence Time Series of High-Resolution C-Band Synthetic Aperture Radar in the Qinghai-Tibet Plateau[J],2022,15.
APA	Zhou, Xin,Zhang, Zhengjia,Shen, Qikai,Chen, Qihao,&Liu, Xiuguo.(2022).Identifying Soil Freeze/Thaw States Using Scattering and Coherence Time Series of High-Resolution C-Band Synthetic Aperture Radar in the Qinghai-Tibet Plateau.IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING,15.
MLA	Zhou, Xin,et al."Identifying Soil Freeze/Thaw States Using Scattering and Coherence Time Series of High-Resolution C-Band Synthetic Aperture Radar in the Qinghai-Tibet Plateau".IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING 15(2022).