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Evaluating Tropical Night by Comparing Trends of Land cover and Land Surface Temperature in Seoul, Korea

  • Sarker, Tanni (Dept. of Geography, George Washington University) ;
  • Huh, Jung Rim (Social Eco Tech Institute, Konkook University) ;
  • Bhang, Kon Joon (Dept. of Civil Engineering, Kumoh National Institute of Technology)
  • Received : 2020.03.19
  • Accepted : 2020.04.29
  • Published : 2020.04.30

Abstract

The impact of urbanization on LST (Land Surface Temperature) and TN (Tropical Night) was observed with the analyses of land cover change and LST by associating with the frequency of TN during the period of 1996 to 2016. The analyses of land cover and LST was based on the images of Landast 5 and 8 for September in 1996, 2006, and 2016 at a 10 year interval. The hourly-collected atmospheric temperatures for the months of July and August during the period were collected from AWSs (Automatic Weather Stations) in Seoul for the frequency analysis of TN. The study area was categorized into five land cover classes: urban or built-up area, forest, mixed vegetation, bare soil and water. It was found that vegetation (-7.71%) and bare soil (-9.04%) decreased during the period while built-up (17.29%) area was expanded throughout the whole period (1996-2016), indicating gradual urbanization. The changes came along with the LST rise in the urban area of built-up and bare soil in Seoul. In addition, the frequency of TN has increased in 4.108% and 7.03% for July and August respectively between the two periods of the 10 year interval, 1996-2006 and 2006-2016. By comparing the increasing trends of land cover, LST, and TN, we found a high probability that the frequency of TN had a relationship with land cover changes by the urbanization process in the study area.

Keywords

References

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