Sang Seo Park

Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea

(1) Yonsei University, Dept of Atmospheric Science, Seoul, Korea, Republic Of (jkim2@yonsei.ac.kr), (2) Joint Center for Earth Systems and Technology, University of Maryland, Baltimore County, UMBC-JCET and NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA, (3) Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan, (4) Department of Atmospheric Science, Pusan National University, Busan, Korea, (5) NOAA ESRL Global Monitoring Division, Boulder, CO, U.S.A.

UV Sensitivity to Changes in Ozone, Aerosols, and Clouds in Seoul, South Korea

AbstractThe total ozone (O3) and aerosol optical depth (AOD) at 320 nm have been observed from the ultraviolet (UV) measurements made at Yonsei University in Seoul, South Korea, with Dobson and Brewer spectrophotometers, respectively, during 2004–10. The daily datasets are analyzed to show the sensitivities of UV radiation to changes in O3, AOD, and cloud cover (CC) together with global solar radiation (GS), including the long-term characteristics of surface UV irradiance in Seoul. The UV sensitivities show that 1% increases of O3 and AOD relative to their reference values under all- and clear-sky conditions similarly manifest as 1–1.2% and 0.2% decreases of both daily erythemal UV (EUV) and total UV (TUV) irradiance at the ground level except for TUV sensitivity to O3 (~0.3%). Those UV sensitivities to CC and GS changes are associated with a 0.12% decrease and 0.7% increase, respectively, in fractional UV changes. The trends show that the positive trends of O3 (+7.2% decade−1), AOD (+22.4% decade−1), and...