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Tracking of Internal Waves Observed by SAR in the Time Series of Temperature Profile Data

시계열 등온선 자료에서의 SAR로 관측된 내부파의 추적 연구

  • Kim, Tae-Rim (College of Ocean Science & Technology, Kunsan University)
  • Published : 2009.04.28

Abstract

An abundance of internal waves is observed by SAR in the Yellow Sea during summer. They are small scaled internal waves and are not relatively studied well compared to the ones in the East/South China Sea. These internal waves should be considered in the study of physio-biological properties of the Yellow Sea because the mixing of the stratified surface water caused by internal waves during summer is important for ocean biological environment, and they also affect the sediment transport and acoustic signal transmission in the continental shelf region. To understand the characteristics of internal waves, it is important to get the spatio-temporal information of internal waves simultaneously by executing in-situ measurements as well as the SAR observation. This study tracks the internal waves observed by SAR in the time series of temperature profile data by analyzing simultaneously acquired in-situ measurement data and RADARSAT SAR image on 29 May 2002.

여름철 우리나라 서해 연안을 관측한 SAR영상에서 다수의 내부파가 관측되고 있으며 이들은 동지나해에서 관측되는 내부파들에 비하여 소규모이며 상대적으로 많은 연구가 이루어지지 않고 있다. 이러한 내부파들은 여름철 표층 해수의 혼합을 발생시킴으로서 해양 생물학적으로 중요한 역할을 하며 대륙붕에서의 퇴적물 이동 및 음파의 전달에 있어서도 중요한 요소로서 서해의 물성 특성 연구에 있어서 반드시 고려되어야 한다. 내부파의 특성 분석을 위해서는 시공간적인 정보가 필요하며 이를 위해서는 현장 관측과 위성 관측이 동시에 이루어져야 한다. 본 연구에서는 2002년 5월 29일 현장 관측과 동시에 획득된 SAR영상을 분석하고 영상에 나타난 내부파와 동일한 내부파를 시간에 따른 수심별 등온선의 변화에서 분석 추적하였다.

Keywords

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