ITPCAS OpenIR  > 图书馆
Mapping soil moisture across the Tibetan Plateau plains using Aquarius active and passive L-band microwave observations
Wang, Q (Wang, Qiang)1; van der Velde, R (van der Velde, Rogier)1; Ferrazzoli, P (Ferrazzoli, Paolo)2; Chen, XL (Chen, Xuelong)3; Bai, XJ (Bai, Xiaojing)4; Su, ZB (Su, Zhongbo)1
Source PublicationINTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
2019
Volume77Issue:0Pages:108-118
DOI10.1016/j.jag.2019.01.005
Abstract

An algorithm is developed for retrieving soil moisture at plateau scale by combined usage of Aquarius active and passive L-band observations. In this algorithm, Look-Up-Tables (LUTs) are established for bare soil and vegetated areas by using the physical based Tor Vergata discrete electromagnetic model (hereafter, TV-DEM). In the case of vegetated area, the LUT is built based on simulations with varying soil moisture and Leaf Area Index (LAI). Only soil moisture is variable for the bare soil case, and values calibrated in previous works are adopted for the other TV-DEM parameters. Soil moisture is then retrieved by minimizing a squared difference object function based on the emissivity and backscatter coefficient observed by Aquarius and the corresponding TV-DEM simulations included in the LUT. The soil moisture retrievals are assessed at Aquarius footprint scale using in-situ measurements collected at three regional scale networks spread across the Tibetan Plateau. The unbiased root mean squared differences (ubRMSDs) from the three networks vary from 0.016 to 0.050 m(3) m(-3) and coefficients of determination (R-2) are from 0.274 to 0.499 (-). This ubRMSD and R-2 is in the same order of the passive-only official Aquarius product, Metop-A Advanced SCATterometer (ASCAT) L2 soil moisture product (hereafter ASCAT) as well as reanalysis data generated by European Centre for Medium-Range Weather Forecasts (hereafter, ERA-Interim). At Plateau-scale, all four soil moisture products capture the seasonal trend, whereby the dynamic range during the monsoon season captured by the ERA-Interim product is relatively small. Further, the northwest-southeast dry-wet gradient due to precipitation and evapotranspiration is well captured by the soil moisture spatial distributions produced by TV-DEM Aquarius, official Aquarius and ASCAT products, but less pronounced in the ERA-Interim product. This study demonstrates that the TV-DEM based algorithm can be used to retrieve soil moisture over a Plateau scale with robust results in terms of error statistics (e.g. bias, R-2 and ubRMSD) and can generate realistic spatial patterns for soil moisture at Plateau-scale.

Subject AreaGeosciences
WOS IDWOS:000460715900010
Language英语
Indexed BySCI
KeywordBalance System Sebs In-situ Dielectric Model Scattering Model Validation Satellite Products Backscattering Uncertainties Scatterometer
WOS Research AreaRemote Sensing
WOS SubjectRemote Sensing
Cooperation Status国际
ISSN0303-2434
Department环境变化与地表过程
URL查看原文
PublisherELSEVIER SCIENCE BV
SubtypeArticle
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9326
Collection图书馆
Corresponding AuthorWang, Q (Wang, Qiang)
Affiliation1.Univ Twente, Fac Geoinformat Sci & Earth Observat ITC, Enschede, Netherlands;
2.Univ Roma Tor Vergata, Dipartimento Ingn Civile & Ingn Informat, Rome, Italy;
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China;
4.Nanjing Univ Informat Sci & Technol, Sch Hydrol & Water Resources, Nanjing 210044, Jiangsu, Peoples R China.
Recommended Citation
GB/T 7714
Wang, Q ,van der Velde, R ,Ferrazzoli, P ,et al. Mapping soil moisture across the Tibetan Plateau plains using Aquarius active and passive L-band microwave observations[J]. INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,2019,77(0):108-118.
APA Wang, Q ,van der Velde, R ,Ferrazzoli, P ,Chen, XL ,Bai, XJ ,&Su, ZB .(2019).Mapping soil moisture across the Tibetan Plateau plains using Aquarius active and passive L-band microwave observations.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,77(0),108-118.
MLA Wang, Q ,et al."Mapping soil moisture across the Tibetan Plateau plains using Aquarius active and passive L-band microwave observations".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 77.0(2019):108-118.
Files in This Item:
File Name/Size DocType Version Access License
2019300.pdf(5165KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, Q (Wang, Qiang)]'s Articles
[van der Velde, R (van der Velde, Rogier)]'s Articles
[Ferrazzoli, P (Ferrazzoli, Paolo)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Q (Wang, Qiang)]'s Articles
[van der Velde, R (van der Velde, Rogier)]'s Articles
[Ferrazzoli, P (Ferrazzoli, Paolo)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Q (Wang, Qiang)]'s Articles
[van der Velde, R (van der Velde, Rogier)]'s Articles
[Ferrazzoli, P (Ferrazzoli, Paolo)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2019300.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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