| Oceanic pycnocline depth retrieval from SAR imagery in the existence of solitary internal waves |
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| 作者姓名： | YANG Jingsong HUANG Weigen XIAO Qingmei ZHOU Chenghu HSU Mingkuang |
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| 作者单位： | [1]Key Laboratory of Ocean Dynamic Processes and Satellite Oceanography, State Oceanic Administration, Hangzhou 310012, China [2]Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China [3]State Laboratory of Resources and Environment Information System, Institute of Geographical Sciences and Natural Resources, Chinese Academy of Sciences, Beijing 100101, China [4]Department of Oceanography, National Taiwan Ocean University, Taibei, China |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863计划) |
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| 摘 要： | Oceanic pycnocline depth is usually inferred from in situ measurements. It is attempted to estimate the depth remotely. As solitary internal waves occur on oceanic pycnocline and propagate along it, it is possible to retrieve the depth indirectly in virtue of the solitary internal waves. A numerical model is presented for retrieving the pycnocline depth from synthetic aperture radar （SAR） images where the solitary internal waves are visible and when ocean waters are fully stratified. This numerical model is constructed by combining the solitary internal wave model and a two-layer ocean model. It is also assumed that the observed groups of solitary internal wave packets on the SAR imagery are generated by local semidiurnal tides. A case study in the East China Sea shows a good agreement with in situ CTD （conductivity-temperature-depth） data.
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| 关 键 词： | SAR 海洋 波浪 密度跃层 波长 |
| 收稿时间： | 2005-04-19 |
| 修稿时间： | 2005-07-05 |
Oceanic pycnocline depth retrieval from SAR imagery in the existence of solitary internal waves |
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| YANG Jingsong,HUANG Weigen,XIAO Qingmei,ZHOU Chenghu,HSU Mingkuang.Oceanic pycnocline depth retrieval from SAR imagery in the existence of solitary internal waves[J].Acta Oceanologica Sinica,2005,24(5):46-49. |
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| Authors: | YANG Jingsong HUANG Weigen XIAO Qingmei ZHOU Chenghu and HSU Mingkuang |
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| Institution: | 1.Key Laboratory of Ocean Dynamic Processes and Satellite Oceanography, State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China2.State Laboratory of Resources and Environment Information System, Institute of Geographical Sciences and Natural Resources, Chinese Academy of Sciences, Beijing 100101, China3.Department of Oceanography, National Taiwan Ocean University, Taibei, China |
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| Abstract: | Oceanic pycnocline depth is usually inferred from in situ measurements. It is attempted to estimate the depth remotely. As solitary internal waves occur on oceanic pycnocline and propagate along it, it is possible to retrieve the depth indirectly in virtue of the solitary internal waves. A numerical model is presented for retrieving the pycnocline depth from synthetic aperture radar (SAR) images where the solitary internal waves are visible and when ocean waters are fully stratified. This numerical model is constructed by combining the solitary internal wave model and a two-layer ocean model. It is also assumed that the observed groups of solitary internal wave packets on the SAR imagery are generated by local semidiurnal tides. A case study in the East China Sea shows a good agreement with in situ CTD (conductivity-temperature-depth) data. |
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| Keywords: | SAR pycnocline depth solitary internal waves |
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