제주도 고산지역 자외선복사의 월변화 특성과 원인 고찰
A Study on the Monthly Characteristics of Solar UV Radiation in Gosan, Jeju
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
The monthly-mean irradiance of ultra violet (UV)-B and UV-A observed from 2005 to 2014 and 2012 to 2014, respectively, at noon in Gosan, Jeju, South Korea are analyzed. We compare cloudiness, total ozone, visibility, and relative humidity with an emphasis on the four months from May to August (MJJA), which shows the largest UV radiation. While the incoming UV-B radiation at the top of the atmosphere in Gosan is the largest in June due to the small solar zenith angle, the observed surface UV-B shows an unexpected smaller value in June than those in May, July or August. In June, the meteorological conditions affecting Gosan are completely dominated by cloudiness and thus, frequent overcast seems to determine the minimum UV-B. Another important UV-determining factor is the total ozone, which exhibits a monotonic decrease during MJJA without agreeing to the characteristic feature of UV. The ratio of UV-B to UV-A is not generally influenced by cloudiness. Thus, the ratio is a useful indicator of atmospheric turbidity showing larger values for increasing visibility, except in June. A simple model has been used to estimate surface UV by using the observed ozone and visibility in the cloudless condition. The result shows that UV has the lowest value in June with small variation during MJJA. Model estimation also shows that the different characteristic features observed in July between surface UV-B and UV-A is the result of less absorption of UV-B by ozone than that of UV-A by a smaller amount of total ozone.
Abstract
The monthly-mean irradiance of ultra violet (UV)-B and UV-A observed from 2005 to 2014 and 2012 to 2014, respectively, at noon in Gosan, Jeju, South Korea are analyzed. We compare cloudiness, total ozone, visibility, and relative humidity with an emphasis on the four months from May to August (MJJA), which shows the largest UV radiation. While the incoming UV-B radiation at the top of the atmosphere in Gosan is the largest in June due to the small solar zenith angle, the observed surface UV-B shows an unexpected smaller value in June than those in May, July or August. In June, the meteorological conditions affecting Gosan are completely dominated by cloudiness and thus, frequent overcast seems to determine the minimum UV-B. Another important UV-determining factor is the total ozone, which exhibits a monotonic decrease during MJJA without agreeing to the characteristic feature of UV. The ratio of UV-B to UV-A is not generally influenced by cloudiness. Thus, the ratio is a useful indicator of atmospheric turbidity showing larger values for increasing visibility, except in June. A simple model has been used to estimate surface UV by using the observed ozone and visibility in the cloudless condition. The result shows that UV has the lowest value in June with small variation during MJJA. Model estimation also shows that the different characteristic features observed in July between surface UV-B and UV-A is the result of less absorption of UV-B by ozone than that of UV-A by a smaller amount of total ozone.
참고문헌 (22)
- Atmosphere, U. S., "U.S. Government Printing Office, Washington, D.C., 1976. Available in hard copy from the National Technical Information Office", ~ (1976)
- Bais, A. F., "Spectral measurements of solar UVB radiation and its relations to total ozone, SO2, and clouds", J. Geophys. Res., 98, pp.5199~5204 (1993)
- Bartlett, L. M., "Changes in ultraviolet radiation in the 1990s: Spectral measurements from Reading, England", J. Geophy. Res., 105, pp.4889~4893 (2000)
- Brine, D. T., "Diffuse and global solar spectral irradiance under cloudless skies", Solar Energy, 30, pp.447~453 (1983)
- Calbó, J., "Empirical studies of cloud effects on UV radiation: A review", Rev. Geophys., 43, pp.RG2002~ (2005)
- Cho, H. -K., "Increase of the surface erythemal ultraviolet-B radiation by the ozone layer depletion", J. Korean Meteor. Soc., 34, pp.272~281 (1998)
- 조희구, "한국 전역의 지표 홍반 자외선 복사의 계절기후", 한국기상학회지, 37(5), pp.525~539 (2001), 한국기상학회
- Spectral distribution of solar irradiance from 25000 nm to 250 nm, "Fröhlich, C.", World Radiation Center, ~ (1981)
- Gueymard, C. A., "The sun’s total and spectral irradiance for solar energy applications and solar radiation models", Solar Energy, 76, pp.423~453 (2004)
- Kim, J. -E., "Variation of the surface UV irradiance with aerosol optical depth at Gwangju", Atmosphere, 11, pp.430~433 (2001)
- 김준, "서울의 최근 자외선 복사의 변화 2004~2010", 대기, 21(4), pp.429~438 (2011), 한국기상학회
- Kim, Y. -K., "A study on sensitivities of the damaging UV-B in Pusan area", J. Korean Meteor. Soc., 34, pp.190~204 (1998)
- Report of Global Atmosphere Watch 2015, "Korea Meteorological Administration", Korea Meteorological Administration, 226~ (2016)
- 곽민경, "한반도 EUV-B 복사의 특성분석 및 적정 비타민D 합성을 위한 노출시간 산출", 대기, 21(2), pp.123~130 (2011), 한국기상학회
- Kylling, A., "Transmittance of a cloud is wavelength-dependent in the UVrange:Physical interpretation", Geophys. Res. Lett., 24, pp.397~400 (1997)
- Leckner, B., "The spectral distribution of solar radiation at the earth’s surface—elements of a model", Solar Energy, 20, pp.143~150 (1978)
- 이동은, "2010년 봄철 고농도 황사의 입경별 화학조성 특성", 한국대기환경학회지, 29(3), pp.325~337 (2013), 한국대기환경학회[DOI]
- 이순봉, "제주도 고산지역 TSP, PM2.5 대기에어로졸의 조성 및 오염특성", 분석과학, 23(4), pp.371~382 (2010), 한국분석과학회
- McCormick, P. G., "Cloud-reflected radiation", Nature, 345, pp.773~ (1990)
- Oh, J. -H., "Impacts of stratospheric ozone depletion on the vertical atmospheric temperature distribution and UV-B radiation at the surface", J. Korean Meteor. Soc., 30, pp.261~287 (1994)
- Vigroux, E., "Contribution à l’étude expérimentale de l’absorption de l’ozone", Ann. Phys., 8, pp.709~762 (1953)
- Dong Xia, "Influence of Atmospheric Relative Humidity on Ultraviolet Flux and Aerosol Direct Radiative Forcing: Observation and Simulation", 한국기상학회지, 52(4), pp.341~352 (2016), 한국기상학회