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Remote Sensing Technology and Application  2016, Vol. 31 Issue (3): 580-589    DOI: 10.11873/j.issn.1004-0323.2016.3.0580
    
Impact of Penetration Depth on L-band Microwave Brightness Temperature in Arid Region based on L-MEB Model
Wang Dingwen1,2,3,Huang Chunlin1,2,Gu Juan4
(1.Heihe Remote Sensing Experimental Research Station,Cold and Arid Regions Environmental and
Engineering Research Institute,CAS,Lanzhou 730000,China;
2.Key Laboratory of Remote Sensing of Gansu Province,Cold and Arid Regions Environmental and
Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China;
Cold and Arid Regions Environmental and Engineering Research Institute,CAS,Lanzhou 730000,China;
3.University of Chinese Academy of Sciences,Beijing 100049,China;
4.College of Earth Environmental Sciences,LanzhouUniversity,Lanzhou 730000,China)
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Abstract  

Based on L\|MEB(the L\|band Microwave Emission of the Biosphere)model and observations of soil moisture and soil temperature profiles of two stations located at HiWATER experimental area in midstream of the Heihe River Basin in 2012,we analyzed the influence of soil moisture variation on L\|band microwave penetration depth.Also,we analyzed further the influence of soil moisture and temperature with different depths as input of L\|MEB on calculations of surface emissivity and brightness temperature.It is shown that penetration depth ranges from 4 to 30 cm in these two sites and obviously changes with soil moisture profile.The calculated brightness temperatures are closer to results of 0~4 cm in Super Station but are closer to results of 0~40 cm in Gobi Station.Therefore,it should be taken much attention to the impact of penetration depth on retrieving soil moisture based on L\|band microwave brightness temperature.

Key words:  Soil moisture;L\      MEB;Microwave remote sensing;Penetration depth;Arid region     
Received:  20 August 2015      Published:  19 July 2016
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Wang Dingwen
Huang Chunlin
Gu Juan

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Wang Dingwen,Huang Chunlin,Gu Juan. Impact of Penetration Depth on L-band Microwave Brightness Temperature in Arid Region based on L-MEB Model. Remote Sensing Technology and Application, 2016, 31(3): 580-589.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2016.3.0580     OR     http://www.rsta.ac.cn/EN/Y2016/V31/I3/580

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