Retrieving capillary-gravity wave spectrum from polarimetric microwave radiation of ocean surface

作     者：YIN XiaoBin WANG ZhenZhan LIU YuGuang 

作者机构：Center for Space Science and Applied ResearchChinese Academy of SciencesBeijing 100190China Physical Oceanography LaboratoryOcean University of ChinaQingdao 266100China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2010年第53卷第6期

页      面：901-910页

核心收录：

学科分类：07[理学] 08[工学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：supported by China Postdoctoral Science Foundation (Grant No. 20070420070) China Postdoctoral Science Foundation Spe-cially Funded Project and National Basic Research Program of China (Grant No. 973-2007CB411807) 

主　　题：microwave radiation of ocean surface two-scale model ocean wave curvature spectrum 

摘      要：A new simple two-scale model on the polarimetric microwave emission of ocean surface is derived at first, which can be ex-pressed as an integral of weighting functions (M0 and M2) and ocean surface curvature spectrum coefficients (C0 and C2). This provides a simple way to investigate the effect of curvature spectrum on ocean emission. It is found that ocean waves with wavelengths both comparable to and much greater than the electromagnetic wavelength can contribute to the harmonics of ocean surface microwave emission, depending on the magnitude of the ocean surface spectrum in these length scales. Bright-ness temperature predictions differ significantly due to present diverse spectrum models, and thus a study on wave spectrum obtained inversely from brightness temperature measurements is necessary. From the ocean surface radiation data measured by polarimetric microwave radiometer, we derived an ocean wave spectrum with a wider wave number range, using the proposed two-scale model and constrained linear least-squares method. The derived ocean wave spectrum is useful for comparing with present diverse models.