Journal of Korean Society for Atmospheric Environment

Korean Society for Atmospheric Environment (한국대기환경학회)
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Characteristics of the Erythemal Ultraviolet-B (EUV-B) Irradiance in Anmyeon (Korea Global Atmosphere Watch Center)

  • Hong, Gi-Man (Korea Global Atmosphere Watch Center, Korea Meteorological Administration) ;
  • Park, Jeong-Gyoo (Korea Global Atmosphere Watch Center, Korea Meteorological Administration)
  • Published : 2008.12.31
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Abstract

We have examined seasonal and annual means of clear-sky solar noon and daily erythemal ultraviolet-B irradiances measured in Anmyeon. The intensity of the EUV-B irradiance is mainly dependent on solar zenith angle (SZA) and total ozone amounts on clear day conditions. The daily maximum occurs near solar noon time and the highest monthly accumulated EUV-B is seen in July in Anmyeon. The maximum daily variation occurs in June and July due to precipitation and clouds. The 7-year trend of EUV-B irradiance shows that it is slightly increasing. Additionally, we could confirm that aerosol effects such as Asian Dust decreases the EUV-B irradiance reaching the ground surface by 35% to 60%. For more than 45% of the summer days, EUV-B irradiacne was high enough that the UV index registered higher than category Extremely High. This information will be very important for evaluation of the UV index for prevention of both skin cancer and ecosystem damages as well as to understand UV climatology over the Korean Peninsula.

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