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2017 Vol.22, Issue 3
Establishment of Thermal Infrared Observation System on Ieodo Ocean Research Station for Time-series Sea Surface Temperature Extraction

시계열 해수면온도 산출을 위한 이어도 종합해양과학기지 열적외선 관측 시스템 구축

KI-MOOK KANG1
,
DUK-JIN KIM1
,
JI-HWAN HWANG1
,
CHANGHYUN CHOI1
,
SUNGHYUN NAM12
,
SEONGJUNG KIM1
,
YANG-KI CHO1,2
,
DO-SEONG BYUN3
,
JOOYOUNG LEE3
강 기묵1
,
김 덕진1
,
황 지환1
,
최 창현1
,
남 성현12
,
김 성중1
,
조 양기1,2
,
최 창현3
,
이 주영3
1School of Earth and Environmental Sciences, Seoul National University
2Research Institute of Oceanography, Seoul National University
3Ocean Research Division, Korea Hydrographic and Oceanographic Agency
1서울대학교 지구환경과학부
2서울대학교 해양연구소
3국립해양조사원 해양과학조사연구실
August 2017. pp. 57-68
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Abstract

이어도 종합해양과학기지(IORS, Ieodo Ocean Research Station) 주변 해역은 시‧ 공간적으로 해양 환경 변화가 심하여, 해양-대기 교환 과정을 비롯하여 해양 생태계와 기후 변화 연구에 필수적인 해수면온도(SST, Sea surface temperature) 자료의 지속적인 측정 이 요구되는 해역이다. 본 연구에서는 이어도 종합해양과학기지에 열적외선 센서를 이용하여 해수면온도 연속 관측이 가능한 시스 템을 구축하였다. 자동 대기 보정 및 해양 조건에 따른 방사율 계산이 가능한 해수면온도 추출 알고리즘을 개발하였고, 현장측정 해 수면온도 자료와의 비교 및 검증을 통해 정확도를 평가하였다. 2015년 5월 17일부터 26일, 그리고 2016년 7월 15일부터 18일까지 기지에 체류하는 동안 열적외선 관측 시스템으로 측정된 해수면온도와 기지 부착 CT (Conductivity-Temperature) 및 튜브 부착 수 온 센서들을 이용하여 현장에서 측정된 해수면온도 시계열을 비교하여 상호상관계수 0.72-0.85, 평균제곱근 편차 0.37-0.90°C의 정 확도를 얻었다. 이 시스템은 이어도 종합해양과학기지뿐만 아니라 신안 가거초 및 옹진 소청초 등의 다른 종합해양과학기지에도 쉽게 구축이 가능한 시스템으로써 향후 발사될 인공위성의 해수면온도 산출알고리즘 개발의 테스트사이트나 검보정사이트로 활 용될 수 있을 것으로 기대할 수 있다.

Continuous monitoring of spatial and temporal changes in key marine environmental parameters such as SST (sea surface temperature) near IORS (Ieodo Ocean Research Station) is demanded to investigate the ocean ecosystem, climate change, and sea-air interaction processes. In this study, we aimed to develop the system for continuously measuring SST using a TIR (thermal infrared) sensor mounted at the IORS. New SST algorithm is developed to provide SST of better quality that includes automatic atmospheric correction and emissivity calculation for different oceanic conditions. Then, the TIR-based SST products were validated against in-situ water temperature measurements during May 17-26, 2015 and July 15-18, 2015 at the IORS, yielding the accuracy of 0.72-0.85 R-square, and 0.37-0.90°C RMSE. This TIR-based SST observing system can be installed easily at similar Ocean Research Stations such as Sinan Gageocho and Ongjin Socheongcho, which provide a vision to be utilized as calibration site for SST remotely sensed from satellites to be launched in future.

Keywords
Sea surface temperature
Thermal infrared
Ieodo Ocean Research Station
Real-time
Automatic atmospheric correction

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Information
  • Publisher :The Korean Society of Oceanography
  • Publisher(Ko) :한국해양학회
  • Journal Title :The Sea Journal of the Korean Society of Oceanography
  • Journal Title(Ko) :한국해양학회지 바다
  • Volume : 22
  • No :3
  • Pages :57-68
  • Received Date : 2017-06-12
  • Revised Date : 2017-08-17
  • Accepted Date : 2017-08-17
  • DOI :https://doi.org/10.7850/jkso.2017.22.3.057
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