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Characteristics of Erythemal Ultraviolet Irradiance operating at Korea Meteorological Administration  

Hong Gi-Man (Korea Global Atmosphere Watch Observatory/Meteorological Research Institute/Korea Meteorological Administration)
Choi Byoung-Cheol (Korea Global Atmosphere Watch Observatory/Meteorological Research Institute/Korea Meteorological Administration)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.22, no.2, 2006 , pp. 223-233 More about this Journal
Abstract
We analyzed the monthly and seasonal mean of the daily Erythemal Ultraviolet-B (EUV-B, $280{\sim}320nm$) irradiance operating in Pohang, Anmyeon, Gosan, Mokpo and Kangnung with UV-Biometer (Solar Light Co., Model No. 501) at clear-sky noon during the period from 1999 to 2004. Also, we investigated the seasonal and regional characteristics for the UV index over the Korean Peninsula. The daily maximum occurred near solar southing time and the highest monthly accumulated EUV-B irradiance appeared in July and August at each regional observatory. The monthly mean value of the clear-sky EUV-B irradiance in Pohang, Anmyeon, Gosan, Mokpo and Kangnung showed 196.6, 161.8, 221.9, $171.5mWm^{-2}\;and\;179.7mWm^{-2}$ near noon in July respectively. The annual mean value of the daily accumulated EUV-B irradiance in Pohang, Anmyeon, Gosan, Mokpo and Kangnung were 1.8, 2.1, 2.2, $1.8kJm^{-2}\;and\;1.5kJm^{-2}$ respectively. The UV Index (UVI) showed above UVI 7(High) more than 90 days during one year over the Korean Peninsula.
Keywords
Erythemal ultraviolet (EUV) irradiance; UV index; Minimal erythemal dose(MED);
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