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2024 Vol.58, Issue 3 Preview Page
The Estimation of Land Surface Temperature based on Landsat 9 Thermal Imagery and Single Channel Technique

Landsat 9호 열적외 영상과 단일채널 기법 기반 지표 온도 추정

Minho Kima
김 민호a
aProfessor, Faculty of School and Environmental Studies
a상명대학교 공간환경학부 정교수
*mhkim@smu.ac.kr
30 September 2024. pp. 201-211
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Abstract

In recent years, surface temperature increased in conjunction with accelerated climate change, and the temperature of surface in Republic of Korea was reported to be 1.4°C higher than earth of 20th century. Surface temperature rising negatively impacts on human health as well as ecosystem, it is a fundamental data set to perform such research. This study utilized single-channel (SC) technique to derive the surface temperature of Sudokwon from Landsat 9 TIRS-2 imagery. According to this research, the surface temperatures of SC technique were close to air temperatures collected from atmospheric weather stations compared with those of U.S. Geological Survey data. Considering it, the SC technique would be appropriate to produce surface temperature for conducting spatio-temporal research. Meanwhile, future research is needed to use other techniques as well as artificial intelligence for deriving surface temperature.

Keywords
Surface temperature
Landsat 9
TIRS-2
single-channel
air temperature

최근 들어 가속화되고 있는 기후변화에 따라 지표 온도가 상승하고 있으며, 우리나라의 지표 온도는 20세기 초보다 약 1.4°C 높은 것으로 보고된 바 있다. 지표 온도의 상승은 인간의 건강뿐만 아니라 생태계에도 부정적 영향을 미치는데, 이러한 연구를 위해 공간적으로 연속적인 지표 온도는 매우 중요한 자료이다. 본 연구는 단일채널 기법을 기반으로 Landsat 9호 TIRS-2 영상으로부터 수도권 지역의 지표 온도를 산출하였다. 연구 결과에 따르면 미국지질조사국에서 배포하는 Landsat Collection 2 Level 2 지표 온도보다 단일채널 기반 지표 온도는 지상관측소에서 측정한 기온과 상대적으로 더 유사한 수준이었다. 따라서 지표 온도를 고려한 시공간 분석을 수행하기 위해 단일채널 기법이 적절할 수 있을 것이다. 다만, 최근 개발된 다양한 지표 온도 추정 기법 및 인공지능이 적용된 향후 연구도 필요하다.

키워드
지표 온도
Landsat 9호
TIRS-2
단일채널
관측 기온
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Information
  • Publisher :The Korean Association of Professional Geographers
  • Publisher(Ko) :국토지리학회
  • Journal Title :국토지리학회지
  • Journal Title(Ko) :THE GEOGRAPHICAL JOURNAL OF KOREA
  • Volume : 58
  • No :3
  • Pages :201-211
  • Received Date : 2024-08-21
  • Revised Date : 2024-09-07
  • Accepted Date : 2024-09-09
  • DOI :https://doi.org/10.22905/kaopqj.2024.58.3.3
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