气候变化领域集成服务门户(CCPortal): Wind Wave Effects on Remote Sensing of Sea Surface Currents From SAR

CCPortal

DOI	10.1029/2020JC016166
	Wind Wave Effects on Remote Sensing of Sea Surface Currents From SAR
	Li S.; Liu B.; Shen H.; Hou Y.; Perrie W.
发表日期	2020
ISSN	21699275
卷号	125 期号:7
英文摘要	Wind waves contribute a significant component to the sea surface currents detected by synthetic aperture radar (SAR) systems via the orbital velocity; this component is typically referred to as the wind wave-induced artifact surface velocity (WASV). Accordingly, it is essential to precisely describe the WASV effect, so that the real sea surface currents can be obtained from SAR measurements. In order to enhance our understanding about WASV, we carried out a numerical analysis of the sea state dependence of WASV under various radar configurations. The simulated WASV compares reasonably well with observations reported in the literature. It is found that WASV not only depends on the wind speed but also increases considerably with the development of the wind waves, as characterized by wave age. WASV may increase by two to three times, in fully developed wind wave conditions, as compared to young waves. The wave age dependence appears to largely account for the observed uncertainty in WASV at a given wind speed; moreover, swell is also found to significantly influence WASV through hydrodynamic modulation of wind wave properties. These effects are stronger at higher wind speeds and vary significantly with the different radar configurations that are possible, in terms of polarizations and incidence angles. The variations in WASV using different shortwave spectral functions and angular spreading functions are examined in this manuscript. ©2020. The Authors.
英文关键词	Doppler velocity; SAR; swell; wind wave
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186790
作者单位	Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Ocean and Climate Dynamics, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China; School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, China; Ocean and Ecosystem Sciences Division, Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, NS, Canada
推荐引用方式 GB/T 7714	Li S.,Liu B.,Shen H.,et al. Wind Wave Effects on Remote Sensing of Sea Surface Currents From SAR[J],2020,125(7).
APA	Li S.,Liu B.,Shen H.,Hou Y.,&Perrie W..(2020).Wind Wave Effects on Remote Sensing of Sea Surface Currents From SAR.Journal of Geophysical Research: Oceans,125(7).
MLA	Li S.,et al."Wind Wave Effects on Remote Sensing of Sea Surface Currents From SAR".Journal of Geophysical Research: Oceans 125.7(2020).