HR: 1340h
AN: A13A-0889    [Abstracts]
TI: Secondary ozone peak associated with downward transport over Korea observed by ozonesonde and HALOE
AU: * Hwang, S
EM: shhwang@kari.re.kr
AF: Korea Aerospace Research Institute, 45, Eoeun-dong, Yuseong-gu, Daejeon, 305-333 Korea, Republic of
AU: Kim, J
EM: jkim2@yonsei.ac.kr
AF: Yonsei University, 134, Sinchon-dong, Seodaemun-gu, Seoul, 120-749 Korea, Republic of
AU: Lee, S
EM: sjlee@kari.re.kr
AF: Korea Aerospace Research Institute, 45, Eoeun-dong, Yuseong-gu, Daejeon, 305-333 Korea, Republic of
AU: Chung, E
EM: ces@kari.re.kr
AF: Korea Aerospace Research Institute, 45, Eoeun-dong, Yuseong-gu, Daejeon, 305-333 Korea, Republic of
AU: Cho, G
EM: gwcho@kari.re.kr
AF: Korea Aerospace Research Institute, 45, Eoeun-dong, Yuseong-gu, Daejeon, 305-333 Korea, Republic of
AB: Vertical profiles of ozone density and temperature were measured from the ozonesonde measurements over the mid-latitude area (at Pohang, Korea, 36.02N, 129.23E) on 1995-2004 periods. Secondary ozone peaks were observed in the upper troposphere and these secondary peaks are located at altitudes of about 12-16 km mostly in winter and spring time where enhanced temperatures were also observed near the peak due to absorption of solar UV radiation. A total of 450 profile data were used for this study from ozonesonde. Secondary peaks were also observed with satellite measurements of HALOE onboard the UARS. To analyze with HALOE data sets, data were archived with extended locations from 32N, 120E to 40N, 135E, which cover the Korean Peninsula region over 1993-2004. 194 profiles were retrieved among HALOE data sets. The occurrence of secondary maxima in the upper troposphere has high correlations with enhancements of temperature and zonal wind speed. Most of these secondary peaks were associated with the downward transport from the lower stratosphere into the upper troposphere for the previous 15 hours in isentropic domain. The backward trajectory model, HYSPLIT (HYbrid Single-Particle Lagrangian Integrated Trajectory) from NOAA was used to light these events and provide a better useful knowledge of transport phenomena. The potential vorticity (PV) map from ECMWF (European Centre for Medium-Range Weather Forecasts) was also investigated to support the downward transport of ozone in this area
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 0368 Troposphere: constituent transport and chemistry
DE: 3334 Middle atmosphere dynamics (0341, 0342)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005