A newly developed ocean significant wave height retrieval method from Envisat ASAR wave mode imagery | |
Fan, Chenqing1; Wang, Xiaochen2,3; Zhang, Xudong1,4; Gao, Dong1 | |
刊名 | ACTA OCEANOLOGICA SINICA |
2019-09 | |
卷号 | 38期号:9页码:120-127 |
关键词 | significant wave height Envisat ASAR GA-PLS optimal feature subset |
ISSN号 | 0253-505X |
DOI | 10.1007/s13131-019-1480-2 |
英文摘要 | The main objective of this paper is to propose a newly developed ocean Significant Wave Height (SWH) retrieval method from Envisat Advanced Synthetic Aperture Radar (ASAR) imagery. A series of wave mode imagery from January, April and May of 2011 are collocated with ERA-Interim reanalysis SWH data. Based on the matched datasets, a simplified empirical relationship between 22 types of SAR imagery parameters and SWH products is developed with the Genetic Algorithms Partial Least-Squares (GA-PLS) model. Two major features of the backscattering coefficient S-10 and the frequency parameter S10 are chosen as the optimal training feature subset of SWH retrieval by using cross validation. In addition, we also present a comparison of the retrieval results of the simplified empirical relationship with the collocated ERA-Interim data. The results show that the assessment index of the correlation coefficient, the bias, the root-mean-square error of cross validation (RMSECV) and the scattering index (SI) are 0.78, 0.07 m, 0.76 m and 0.5, respectively. In addition, the comparison of the retrieved SWH data between our simplifying model and the Jason-2 radar altimeter data is proposed in our study. Moreover, we also make a comparison of the retrieval of SWH data between our developed model and the wellknown CWAVE_ENV model. The results show that satisfying retrieval results are acquired in the low-moderate sea state, but major bias appears in the high sea state, especially for SWH>5 m. |
资助项目 | National Natural Science Foundation of China[41431174] ; National Natural Science Foundation of China[61471358] ; National Natural Science Foundation of China[41401427] |
WOS研究方向 | Oceanography |
语种 | 英语 |
出版者 | SPRINGER |
WOS记录号 | WOS:000485996200011 |
内容类型 | 期刊论文 |
源URL | [http://ir.fio.com.cn:8080/handle/2SI8HI0U/30257] |
专题 | 业务部门_海洋物理与遥感研究室 |
通讯作者 | Wang, Xiaochen |
作者单位 | 1.Minist Nat Resources, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China 2.Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100190, Peoples R China 3.Deqing Acad Satellite Applicat, Lab Target Microwave Properties, Deqing 313200, Peoples R China 4.Ocean Univ China, Coll Informat & Engn, Qingdao 266071, Shandong, Peoples R China |
推荐引用方式 GB/T 7714 | Fan, Chenqing,Wang, Xiaochen,Zhang, Xudong,et al. A newly developed ocean significant wave height retrieval method from Envisat ASAR wave mode imagery[J]. ACTA OCEANOLOGICA SINICA,2019,38(9):120-127. |
APA | Fan, Chenqing,Wang, Xiaochen,Zhang, Xudong,&Gao, Dong.(2019).A newly developed ocean significant wave height retrieval method from Envisat ASAR wave mode imagery.ACTA OCEANOLOGICA SINICA,38(9),120-127. |
MLA | Fan, Chenqing,et al."A newly developed ocean significant wave height retrieval method from Envisat ASAR wave mode imagery".ACTA OCEANOLOGICA SINICA 38.9(2019):120-127. |
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