Oceanic pycnocline depth retrieval from SAR imagery in the existence of solitary internal waves  

作　　者：YANG Jingsong HUANG Weigen XIAO Qingmei ZHOU Chenghu HSU Mingkuang 

机构地区：[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

出　　处：《Acta Oceanologica Sinica》2005年第5期46-49,共4页海洋学报（英文版）

基　　金：This project was supported by the National Natural Science Foundation of China under contract No.40206023;the National Hi-Tech Project(“863”Program)of China under contract Nos 2002AA639360 and 2002AA633120.

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.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.

关 键 词：SAR pycnocline depth solitary internal waves 

分 类 号：P731.24[天文地球—海洋科学]