气候变化领域集成服务门户(CCPortal): Soil moisture experiment in the Luan River supporting new satellite mission opportunities

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DOI	10.1016/j.rse.2020.111680
	Soil moisture experiment in the Luan River supporting new satellite mission opportunities
	Zhao T.; Shi J.; Lv L.; Xu H.; Chen D.; Cui Q.; Jackson T.J.; Yan G.; Jia L.; Chen L.; Zhao K.; Zheng X.; Zhao L.; Zheng C.; Ji D.; Xiong C.; Wang T.; Li R.; Pan J.; Wen J.; Yu C.; Zheng Y.; Jiang L.; Chai L.; Lu H.; Yao P.; Ma J.; Lv H.; Wu J.; Zhao W.; Yang N.; Guo P.; Li Y.; Hu L.; Geng D.; Zhang Z.
发表日期	2020
ISSN	00344257
卷号	240
英文摘要	The Soil Moisture Experiment in the Luan River (SMELR) was conducted from 2017 to 2018 in the semi-arid Luan River watershed located in the North of China. One of the objectives of SMELR is to serve as an assessment tool and demonstration for a new Terrestrial Water Resources Satellite (TWRS) concept with one-dimensional synthetic aperture microwave techniques, for which soil moisture retrieval under variable satellite observing configurations (mainly in terms of incidence angels) is the greatest challenge. This proposed mission is targeted to provide continuity for the current satellite L-band microwave observations, and further improve the accuracy and spatial resolution of soil moisture mapping through the synergistic use of active, passive and optical remote sensing data. Multi-resolution, multi-angle and multi-spectral airborne data were obtained four times over a 70 km by 12 km area in the Shandian River basin, and one time over a 165 km by 5 km area that includes the Xiaoluan River basin. The near surface soil moisture (0 cm–5 cm) was measured extensively on the ground in fifty 1 km by 2 km quadrats (targeted to compare with the airborne radiometer), and two hundred and fifty 200 m by 200 m quadrats corresponding to radar observations. Two networks were established for continuous measurement of the soil moisture and temperature profile (3 cm, 5 cm, 10 cm, 20 cm, 50 cm) and precipitation in the Shandian and Xiaoluan River basin, respectively. Supporting ground measurements also included ground temperature, vegetation water content, surface roughness, continuous measurement of microwave emission and backscatter at a pasture site, reflectance of various land cover types, evapotranspiration and aerosol observations. Preliminary results within the experimental area indicate that (1) the near surface soil moisture spatial variability at a 200 m scale was up to ~0.1 cm3/cm3 at an intermediate value of ~0.35 cm3/cm3. (2) The difference of soil and vegetation temperature in grass and croplands reach its maximum of 11 K around solar noon time, and the soil temperature gradient is largest at around 15 P.M. (3) Both the airborne and ground measurements cover a wide range of conditions. The L-band active and passive observations exhibit a large variation of ~30 dB and ~80 K, respectively, corresponding to soil moisture range from 0.1 cm3/cm3 to 0.5 cm3/cm3. The sensitivity of both active and passive data to soil moisture is compared at corresponding spatial resolutions and show high information complementarity for better accuracy and resolution soil moisture retrieval. © 2020
英文关键词	Airborne experiment; L-band active and passive; Luan River; Soil moisture; Terrestrial Water Resources Satellite
语种	英语
scopus关键词	Remote sensing; Rivers; Satellites; Soil moisture; Surface roughness; Synthetic apertures; Temperature; Vegetation; Watersheds; Airborne experiments; Continuous measurements; L-band active and passive; Optical remote sensing data; Soil moisture retrievals; Soil temperature gradient; Vegetation temperature; Vegetation water content; Soil surveys; accuracy assessment; airborne survey; backscatter; experimental study; ground-based measurement; radiometer; satellite altimetry; satellite data; satellite mission; soil moisture; soil temperature; spatial resolution; synthetic aperture radar; water resource; watershed; China; Luan River
来源期刊	Remote Sensing of Environment
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179427
作者单位	State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, China; Shanghai Academy of Spaceflight Technology, China; Information Center of Ministry of Water Resources of China, China; USDA-ARS Hydrology and Remote Sensing Laboratory (Retired), United States; Faculty of Geographical Science, Beijing Normal University, China; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, China; Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, China; Department of Earth System Science, Tsinghua University, China; China Institute of Water Resources and Hydropower Research, China; College of Hydrology and Water Resources, Hohai University, China; Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Conservancy, China; School of Surveying and Land Information Engineering, Henan Polytechnic University, China; College of Information Science and Engineering, Shan...
推荐引用方式 GB/T 7714	Zhao T.,Shi J.,Lv L.,et al. Soil moisture experiment in the Luan River supporting new satellite mission opportunities[J]. 中国科学院西北生态环境资源研究院,2020,240.
APA	Zhao T..,Shi J..,Lv L..,Xu H..,Chen D..,...&Zhang Z..(2020).Soil moisture experiment in the Luan River supporting new satellite mission opportunities.Remote Sensing of Environment,240.
MLA	Zhao T.,et al."Soil moisture experiment in the Luan River supporting new satellite mission opportunities".Remote Sensing of Environment 240(2020).