Evaluation of the Applicability of Different Dielectric Models for Soil Moisture Retrieval based on the Ground-based Radiometer Measurements

Zuoliang Wang; Jun Wen; Rong Liu; Zhenchao Li; Donghai Zheng; Xin Wang

doi:10.11873/j.issn.1004-0323.2020.1.0097

Remote Sensing Technology and Application 鈥衡�� 2020, Vol. 35 鈥衡�� Issue (1): 97-110.DOI: 10.11873/j.issn.1004-0323.2020.1.0097

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Evaluation of the Applicability of Different Dielectric Models for Soil Moisture Retrieval based on the Ground-based Radiometer Measurements

Zuoliang Wang^1,²(),Jun Wen³(),Rong Liu¹,Zhenchao Li¹,Donghai Zheng⁴,Xin Wang¹

^1. Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
^2. University of Chinese Academy of Sciences, Beijing 100049, China
^3. College of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225, China
^4. National Tibetan Plateau Data Center, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China

Received:2019-11-03 Revised:2020-01-12 Online:2020-04-01 Published:2020-02-20
Contact: Jun Wen

鍩轰簬鍦板熀寰尝杈愬皠璁℃暟鎹瘎浼颁笉鍚屽湡澹や粙鐢垫ā鍨嬪弽婕斿湡澹ゆ箍搴︾殑閫傜敤鎬�

鐜嬩綔浜�^1,²(),鏂囧啗³(),鍒樿搲¹,鏉庢尟鏈�¹,閮戜笢娴�⁴,鐜嬫¹

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^2. 涓浗绉戝闄㈠ぇ瀛︼紝鍖椾含 100049
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閫氳浣滆��: 鏂囧啗
浣滆�呯畝浠�:鐜嬩綔浜�(1990-)锛岀敺锛岀敇鑲冩櫙娉颁汉锛屽伐绋嬪笀锛屼富瑕佷粠浜嬮潚钘忛珮鍘熷湡澹ゆ箍搴﹁娴嬫ā鎷熺爺绌躲�侲?mail锛�zuoliangwang@lzb.ac.cn銆�
鍩洪噾璧勫姪:
鍥藉鑷劧绉戝鍩洪噾椤圭洰(41971308);鍥藉鑷劧绉戝鍩洪噾鍩硅偛椤圭洰(91737103)

Abstract

Abstract:

Based on soil moisture and freeze/thaw comprehensive experiments conducted at the north-eastern part of the Tibetan Plateau, the L-band brightness temperature, the in-situ soil moisture and temperature, vegetation leaf area index are measured simultaneously for the purpose of evaluating performances on forward brightness temperature simulation and soil moisture retrieval using four dielectric constant models, including Wang-Schmugge, Mironov, Dobson, and Four-Phase model. The forward brightness temperature simulations indicate that the difference of simulated brightness temperature between Wang schmugge model and the other three dielectric constant models is most significant at lower soil moisture content condition (soil moisture is less than 0.23 m3路m^-3) , nevertheless, the difference of Mironov model simulation is most significant in contrast with the ones of other three models at higher soil moisture condition (soil moisture is greater than 0.23 m3路m^-3). The practical retrieval of soil moisture from the ground-based radiometer measurements indicate that Wang-Schmugge model can effectively reduce the underestimation of soil moisture at the horizontal polarization, this resulted an improvement to the accuracy of retrieved soil moisture. Mironov model can reduce the underestimation of retrieved soil moisture at the vertical polarization. In accordance with a state-of-the-art parameterization scheme, the evaluation of performances of four dielectric constant models at the typical alpine meadow is potential for selecting optimum soil moisture retrieval by using soil dielectric model from space-borne L-band radiometer observation over the Tibetan Plateau

Key words: L-Band, Passive microwave, Microwave brightness temperature, Soil permittivity model, Soil moisture retrieval

鎽樿锛�

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鍏抽敭璇�: L娉㈡, 琚姩寰尝, 寰尝浜俯, 鍦熷￥浠嬬數妯″瀷, 鍦熷￥婀垮害鍙嶆紨

CLC Number:

TP721.1

Zuoliang Wang,Jun Wen,Rong Liu,Zhenchao Li,Donghai Zheng,Xin Wang. Evaluation of the Applicability of Different Dielectric Models for Soil Moisture Retrieval based on the Ground-based Radiometer Measurements[J]. Remote Sensing Technology and Application, 2020, 35(1): 97-110.

鐜嬩綔浜�,鏂囧啗,鍒樿搲,鏉庢尟鏈�,閮戜笢娴�,鐜嬫. 鍩轰簬鍦板熀寰尝杈愬皠璁℃暟鎹瘎浼颁笉鍚屽湡澹や粙鐢垫ā鍨嬪弽婕斿湡澹ゆ箍搴︾殑閫傜敤鎬J]. 閬ユ劅鎶�鏈笌搴旂敤, 2020, 35(1): 97-110.

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Evaluation of the Applicability of Different Dielectric Models for Soil Moisture Retrieval based on the Ground-based Radiometer Measurements

鍩轰簬鍦板熀寰尝杈愬皠璁℃暟鎹瘎浼颁笉鍚屽湡澹や粙鐢垫ā鍨嬪弽婕斿湡澹ゆ箍搴︾殑閫傜敤鎬�

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