PMO OpenIR
Monitoring Bare Soil Freeze-Thaw Process Using GPS-Interferometric Reflectometry: Simulation and Validation
Wu, Xuerui1,2; Jin, Shuanggen1; Chang, Liang3,4
2018
Source PublicationREMOTE SENSING
ISSN2072-4292
Volume10Issue:1Pages:18
Corresponding AuthorWu, Xuerui(xrwu@shao.ac.cn)
AbstractFrozen soil and permafrost affect ecosystem diversity and productivity as well as global energy and water cycles. Although some space-based Radar techniques or ground-based sensors can monitor frozen soil and permafrost variations, there are some shortcomings and challenges. For the first time, we use GPS-Interferometric Reflectometry (GPS-IR) to monitor and investigate the bare soil freeze-thaw process as a new remote sensing tool. The mixed-texture permittivity models are employed to calculate the frozen and thawed soil permittivities. When the soil freeze/thaw process occurs, there is an abrupt change in the soil permittivity, which will result in soil scattering variations. The corresponding theoretical simulation results from the forward GPS multipath simulator show variations of GPS multipath observables. As for the in-situ measurements, virtual bistatic radar is employed to simplify the analysis. Within the GPS-IR spatial resolution, one SNOTEL site (ID 958) and one corresponding PBO (plate boundary observatory) GPS site (AB33) are used for analysis. In 2011, two representative days (frozen soil on Doy of Year (DOY) 318 and thawed soil on DOY 322) show the SNR changes of phase and amplitude. The GPS site and the corresponding SNOTEL site in four different years are analyzed for comparisons. When the soil freeze/thaw process occurred and no confounding snow depth and soil moisture effects existed, it exhibited a good absolute correlation (|R| = 0.72 in 2009, |R| = 0.902 in 2012, |R| = 0.646 in 2013, and |R| = 0.7017 in 2014) with the average detrended SNR data. Our theoretical simulation and experimental results demonstrate that GPS-IR has potential for monitoring the bare soil temperature during the soil freeze-thaw process, while more test works should be done in the future. GNSS-R polarimetry is also discussed as an option for detection. More retrieval work about elevation and polarization combinations are the focus of future development.
KeywordGPS-IR multipath permittivity soil freeze-thaw process
DOI10.3390/rs10010014
WOS KeywordDIELECTRIC-CONSTANT ; REFLECTED SIGNALS ; BISTATIC RADAR ; UNITED-STATES ; SNOW DEPTH ; SURFACE ; PARAMETERS ; SCATTERING ; MULTIPATH ; OCEAN
Indexed BySCI
Language英语
WOS Research AreaRemote Sensing
WOS SubjectRemote Sensing
WOS IDWOS:000424092300013
PublisherMDPI AG
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22194
Collection中国科学院紫金山天文台
Corresponding AuthorWu, Xuerui
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Planetary Sci, Shanghai 200030, Peoples R China
3.Shanghai Ocean Univ, Coll Marine Sci, Shanghai 201306, Peoples R China
4.Collaborat Innovat Ctr Distant Water Fisheries, Shanghai 201306, Peoples R China
Recommended Citation
GB/T 7714
Wu, Xuerui,Jin, Shuanggen,Chang, Liang. Monitoring Bare Soil Freeze-Thaw Process Using GPS-Interferometric Reflectometry: Simulation and Validation[J]. REMOTE SENSING,2018,10(1):18.
APA Wu, Xuerui,Jin, Shuanggen,&Chang, Liang.(2018).Monitoring Bare Soil Freeze-Thaw Process Using GPS-Interferometric Reflectometry: Simulation and Validation.REMOTE SENSING,10(1),18.
MLA Wu, Xuerui,et al."Monitoring Bare Soil Freeze-Thaw Process Using GPS-Interferometric Reflectometry: Simulation and Validation".REMOTE SENSING 10.1(2018):18.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wu, Xuerui]'s Articles
[Jin, Shuanggen]'s Articles
[Chang, Liang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wu, Xuerui]'s Articles
[Jin, Shuanggen]'s Articles
[Chang, Liang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wu, Xuerui]'s Articles
[Jin, Shuanggen]'s Articles
[Chang, Liang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.