A Theoretical Model for the Microwave Emissivity of Rough Sea Surfaces

doi:10.1007/s11802-022-5069-0

CORC > 海洋研究所 > 中国科学院海洋研究所

	A Theoretical Model for the Microwave Emissivity of Rough Sea Surfaces
	Yang Zhenlin 1; Wei Enbo 2,3,4; Gao Peng 1
刊名	JOURNAL OF OCEAN UNIVERSITY OF CHINA
	2022-06-20
页码	8
关键词	rough surfaces microwave emissivity dielectric constant effective media theory
ISSN号	1672-5182
DOI	10.1007/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
出版者	OCEAN UNIV CHINA
WOS记录号	WOS:000813681400008
内容类型	期刊论文
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 Univ Sci & Technol, Sch Math & Phys, Qingdao 266061, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266071, 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.