A Physics-Based Dual-Frequency Approach for Altimeter Wind Speed Retrieval

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	A Physics-Based Dual-Frequency Approach for Altimeter Wind Speed Retrieval
	Li Shuiqing 1,2; Zhou Liangming 2; Li Zhanbin 3; Miao Qingsheng 3; Mou Lin 3; Wang Aifang 4
刊名	JOURNAL OF OCEAN UNIVERSITY OF CHINA
	2014-08-01
卷号	13 期号:4 页码:579-583
关键词	altimeter mean square slope dual-frequency wind speed retrieval
通讯作者	Zhou, LM (reprint author), Ocean Univ China, Phys Oceanog Lab, Qingdao 266100, Peoples R China.
英文摘要	The altimeter normalized radar cross section (NRCS) has been used to retrieve the sea surface wind speed for decades, and more than a dozen of wind speed retrieval algorithms have been proposed. Despite the continuing efforts to improve the wind speed measurements, a bias dependence on wave state persists in all wind algorithms. On the basis of recent evidence that short waves are essentially modulated by local winds and much less affected by wave state, we proposed a physics-based approach to retrieve the wind speed from the dual-frequency difference in terms of the mean square slope of short waves. A collocated dataset of coincident altimeter/buoy measurements were used to develop and validate the approach. Validation against buoy measurements indicates that the approach is almost unbiased and has an overall root mean square error of 1.24 m s(-1), which is 5.3% lower than the single-parameter algorithm in operational use (Witter and Chelton, 1991) and 2.4% lower than another dual-frequency approach (Chen et al., 2002). Furthermore, the results indicate that the new approach significantly improves the wave-dependent bias compared to the single-parameter algorithm. The capacity of altimeter to retrieve sea surface wind speed appears to be limited for the case of winds below 3 m s(-1). The validity of the approach at high winds needs to be further examined in the future study.
学科主题	Oceanography
收录类别	SCI
语种	英语
WOS记录号	WOS:000339093900005
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/23906]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Ocean Univ China, Phys Oceanog Lab, Qingdao 266100, Peoples R China 3.State Ocean Adm Peoples Republ China, Natl Marine Data & Informat Serv, Tianjin 300171, Peoples R China 4.Ocean Univ China, Engn Reconnaissance & Design Inst, Qingdao 266100, Peoples R China
推荐引用方式 GB/T 7714	Li Shuiqing,Zhou Liangming,Li Zhanbin,et al. A Physics-Based Dual-Frequency Approach for Altimeter Wind Speed Retrieval[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2014,13(4):579-583.
APA	Li Shuiqing,Zhou Liangming,Li Zhanbin,Miao Qingsheng,Mou Lin,&Wang Aifang.(2014).A Physics-Based Dual-Frequency Approach for Altimeter Wind Speed Retrieval.JOURNAL OF OCEAN UNIVERSITY OF CHINA,13(4),579-583.
MLA	Li Shuiqing,et al."A Physics-Based Dual-Frequency Approach for Altimeter Wind Speed Retrieval".JOURNAL OF OCEAN UNIVERSITY OF CHINA 13.4(2014):579-583.