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A Theoretical Model for the Microwave Emissivity of Rough Sea Surfaces

文献类型：期刊论文

作者Yang Zhenlin4; Wei Enbo1,2,3; Gao Peng4
刊名JOURNAL OF OCEAN UNIVERSITY OF CHINA
出版日期2022-06-20
页码8
关键词rough surfaces microwave emissivity dielectric constant effective media theory
ISSN号1672-5182
DOI10.1007/s11802-022-5069-0
通讯作者Wei Enbo(enboweiprof@163.com) ; Gao Peng(pgaoqust@163.com)
英文摘要When sea surface wavelengths are not larger than microwave wavelengths, the microwave emissivity of Gaussian rough sea surfaces can be investigated by applying effective media theory (EMT) of rough surfaces. For one-dimensional Gaussian sea surface, the microwave emissivity model is proposed by EMT, which regards the air-sea rough interface as a new effective medium of isotropic permittivity between the top layer of air and the bottom layer of seawater. The emissivity model is controlled by the root mean square deviation (RMSD) of the rough surface height and the correlation length of the rough surface. Results clearly show that the emissivity increases along with the RMSD increase if the latter is smaller than a critical value. Furthermore, excess emissivities and the brightness temperature increments for a wind-roughened sea surface can be estimated from those of flat surfaces by fitting the RMSD as a function of wind speed. Good agreements are obtained by comparing the results of our model with the satellite data at microwave frequencies of 1.4, 6.8, 18, 21, and 37 GHz, respectively. Moreover, these findings imply that our method can be extended to retrieve the sea surface parameters, such as RMSD and the correlation length of the rough surface, from the satellite data.
资助项目National Natural Science Foundation of China[41676169] ; National Key R&D Program of China[2016YFC1401006]
WOS研究方向Oceanography
语种英语
WOS记录号WOS:000813681400008
出版者OCEAN UNIV CHINA
源URL[http://ir.qdio.ac.cn/handle/337002/179682]  
专题中国科学院海洋研究所
通讯作者Wei Enbo; Gao Peng
作者单位1.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
4.Qingdao Univ Sci & Technol, Sch Math & Phys, Qingdao 266061, Peoples R China
推荐引用方式
GB/T 7714		 Yang Zhenlin,Wei Enbo,Gao Peng. A Theoretical Model for the Microwave Emissivity of Rough Sea Surfaces[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2022:8.
APA Yang Zhenlin,Wei Enbo,&Gao Peng.(2022).A Theoretical Model for the Microwave Emissivity of Rough Sea Surfaces.JOURNAL OF OCEAN UNIVERSITY OF CHINA,8.
MLA Yang Zhenlin,et al."A Theoretical Model for the Microwave Emissivity of Rough Sea Surfaces".JOURNAL OF OCEAN UNIVERSITY OF CHINA (2022):8.

入库方式： OAI收割

来源：海洋研究所

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