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Seasonal Variation and Measurement Uncertainty of UV Aerosol Optical Depth Measured at Gwangju, Korea  

Kim, Jeong-Eun (Department of Environmental science and engineering, Gwangju Institute of science and Technology (GIST), Advanced Environmental Monitiring Research Chnter (ADEMRC))
Kim, Young-Joon (Department of Environmental science and engineering, Gwangju Institute of science and Technology (GIST), Advanced Environmental Monitiring Research Chnter (ADEMRC))
Publication Information
Journal of Korean Society for Atmospheric Environment / v.21, no.6, 2005 , pp. 631-637 More about this Journal
Abstract
A UV-MFRSR instrument was used to measure the global and diffuse irradiances in 7 narrowband channels in the UV range 299.4, 304.4, 310.9, 317.3. 324.5, 331.3 and 367.4 nm at Gwangju ($35^{circ}\;13), Korea. Spectral UV-AOD was retrieved using the Langley plot method for data collected from April 2002 to July 2004. Temporal variation of AOD at 367.4 nm ($AOD_{367nm}$) showed a maximum in June ($0.95\pm0.43$) and a minimum in February ($0.31\pm0.14$). Clear seasonal variation of $AOD_{367nm}$ was observed with average values of $0.68\pm0.29,\;0.82\pm0.41,\;0.48\pm0.22\;and\;0.42\pm0.21$ in spring, summer, fall and winter, respectively, Average Angstrom exponent for the entire monitoring period was $2.03\pm0.75$ in the UV-A ($324.5\∼367.4$ nm) range. Seasonal variation of the Angstrom exponent showed a maximum in spring and a minimum in summer. The lowest Angstrom exponent in summer might be due to hygroscopic growth of particles under conditions of high relative humidity. UV-AOD changes under different atmospheric conditions were also analyzed. Uncertainty in retrieving spectral UV-AOD was also estimated to range between $\pm0.218\;at\;304.4\;nm\;and\;\pm0.135\;at\;367.4\;nm$. Major causes of uncertainty were total column ozone retrieval and extraterrestrial irradiance retrieval at shorter and longer wavelengths, respectively.
Keywords
UV irradiance; Aerosol optical depth; UV-MFRSR; Aerosol optical properties;
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  • Reference
1 Cheymol, A. and H. De Backer (2003) Retrieval of the aerosol optical depth in the UV-B at Uccle from Brewer ozone measurements over a long time period 1984-2002, Journal of Geophysical Research, 108 (D24), doi:10.1029/2003JD003758
2 Harrison, L. and J. Michalsky (1994) Objective Algorithms for the Retrieval of Optical depths from Ground-based Measurements, Applied Optics, 33(22), 5126-5132   DOI
3 Kirchhoff, V.W.J.H., A.A. Silva, and D.K. Pinheiro (2002) Wavelength dependence of aerosol optical thickness in the UV-B band, Geophysical Research Letter, 29(12), doi:10.1029/2001g1014141
4 Lee, K.H., J.E. Kim, Y.J. Kim, J. Kim, W. von Hoynrngen-Huene (2005) Impact of the smoke aerosol from Russian forest fires on the atmospheric environment over Korea during May 2003, Atmospheric Environment, 39, 85-99   DOI   ScienceOn
5 Grobner J. and C. Meleti (2004) Aerosol optical depth in the UVB and visible wavelength range from Brewer spectrophotometer direct irradiance measurements: 1991-2002, Journal of Geophysical Research, 109, D09202, doi:10.1029/2003JD004409
6 Ryu, S.Y., J.E. Kim, Z. He, Y.J. Kim, and G.U. Kang (2004) Chemical composition of post-harvest biomass burning aerosols in Gwangju, Korea, Air & Waste Management Association, 54, 1124-1137   DOI   ScienceOn
7 Bigelow, D.S., J.R. Slusser, A.F. Beaubien, and J.H. Gibson (1998) The USDA Ultraviolet Radiation Monitoring Program, Bull. Am. Meteorol., Soc., 79, 601-615   DOI   ScienceOn
8 Wenny, B.N., V.K. Saxena, and J.E. Frederick (2001) Aerosol optical depth measurements and their impact on surface levels of ultraviolet-B radiation, Journal of Geophysical Research, 106(DI5), 17311-17319   DOI
9 Jaroslawski, J., J.W. Krzyscin, S. Puchalski, and P. Sobolewski (2003) On the optical thickness in the UV range: Analysis of the ground-based data taken at Belsk, Poland, Journal of Geophysical Research, 108 (D23), doi:10.1029/2003JD00357l
10 Kylling, A., A.F. Bais, M. Blumthaler, J. Schreder, C.S. Zerefos, and E. Kosmidis(1998) Effect of aerosols on solar UV irradiances during the photochemical activity and solar ultraviolet radiation campaign, J. Geophys. Res., 103(D20), 26,051-26,060   DOI
11 Iqbal, M. (1983) An introduction to solar radiation, pp. 3, Academic Press Canada
12 Harrison, L., J. Michalsky, and J. Berndt (1994) Automated multifilter rotating shadow-band radiometer: an instrument for optical depth and radiation measurement, Applied Optics, 33(22), 5118-5125   DOI
13 Kerr, J. (1997) Observed dependencies of atmospheric UV radiation and trends, in Solar Ultraviolet Radiation: Modeling, Measurements and Effects, edited by C.S. Zerefos and A.F. Bais, pp. 259-266, Springer -Verlag, New York
14 Liu, S.C., S.A. McKeen, and S. Madronich (1991) Effect of anthropogenic aerosols on biologically active ultraviolet radiation, Geophysical Research Letter, 18(12), 2265-2268   DOI
15 Molina, L.T. and M.J. Molina, (1986) Absolute Absorption Cross Sections of Ozone in the 185- to 350-nm, wavelength Region, Journal of Geophysical Research, 91, 14501-14508   DOI
16 Zerefos, C. (1997) Factors influencing the transmission of the solar ultraviolet irradiance through the Earth's atmosphere, in Solar Ultraviolet Radiation, Modeling Measurements and Effects, ATO ASI Ser. I, vol. 52, edited by C.S. Zerefos and A.F. Bais, pp. 133-141, Springer Verlag New York
17 Hansen, J.E. and L.D. Travis (1974) Light scattering in planetary atmosphere, Space Science Rev., 16, 527-610   DOI
18 Kirchhoff, V.W.J.H., A.A. Silva, C.A. Costa, N.P. Leme, H.G. Pavao, and F. Zaratti (2001) UV-B optical thickness observations of the atmosphere, Journal of Geophysical Research, 106(D3), 2963-2973   DOI