A Physics-Based Dual-Frequency Approach for Altimeter Wind Speed Retrieval
文献类型：CNKI期刊论文
| 作者 | LI Shuiqing; ZHOU Liangming; LI Zhanbin; MIAO Qingsheng; MOU Lin; WANG Aifang |
| 发表日期 | 2014-08-06 |
| 出处 | Journal of Ocean University of China
 |
| 关键词 | altimeter mean square slope dual-frequency wind speed retrieval |
| 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. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the National High Technology Research and Development Program of China (2013 AA09A505) |
| 卷 | v.13期:04页:45-49 |
| 语种 | 英文; |
| 分类号 | P714.2 |
| ISSN号 | 1672-5182 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/190366]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.InstituteofOceanology,ChineseAcademyofSciences 2.PhysicalOceanographyLaboratory,OceanUniversityofChina 3.NationalMarineDataandInformationService,StateOceanicAdministrationofPeople’sRepublicofChina 4.EngineeringReconnaissanceandDesignInstitute,OceanUniversityofChina |
| 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. 2014. |
入库方式： OAI收割
来源：海洋研究所
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