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September 25. 2001 C.H.Lee and C.B.Park Institute for Laser Engineering

Network for the Detection of Stratospheric Change (NDSC) 2001 Symposium. Tropopause folding effect on variation of ozone concentration measured by lidar and sonde over Suwon station. September 25. 2001 C.H.Lee and C.B.Park Institute for Laser Engineering Kyung Hee University, Korea.

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September 25. 2001 C.H.Lee and C.B.Park Institute for Laser Engineering

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  1. Network for the Detection of Stratospheric Change (NDSC) 2001 Symposium Tropopause folding effect on variation of ozone concentration measured by lidar and sonde over Suwon station September 25. 2001 C.H.Lee and C.B.Park Institute for Laser Engineering Kyung Hee University, Korea

  2. History of measurements 1992, 10 : Stratospheric Ozone DIAL installation (308/353 nm) 1993, 05 : Combined Ozone DIAL installation with tropospheric Ozone DlAL (308/353, 292/319 nm) 1995, 10 : Mie Aerosol Lidar installation (532 nm) 1999, 06 : Stratospheric Ozone DIAL (308/351 nm) and Multi- Wavelengths Aerosol Lidar (355/387/408/532/1064 nm) installation

  3. Combined Ozone DIAL DIAL Scheme Wavelength : 308/353 nm 292/319 nm Energy : 50/25 mJ , 8/4 mJ Altitude : 4 - 30 km (Aerosol 10 - 30 km) Resolution : 250 m Counter : Photon Counting Data : Ozone Concentration (DIAL) Aerosol Backscattering Ratio (Transmission)

  4. Ecc Ozone Sonde SpecificationTypical Profile (Partial Press/ Temperature) Instrument : ECC Sonde MARK II ( VIZ Co., USA) 5A ECC ( Science Pump., USA) Data : Vertical Profile of Ozone Partial Pressure and Temperature (c) Frequency : 1 times in a week Location : Pohang (36.N/129.2E)

  5. Fig 1 Variation of total ozone in stratosphere +Lidar, oSonde 10-30 km

  6. Fig 2Second Ozone maximum of Ozone Profile Second Ozone maximum

  7. Fig 3 Seasonal variation of peak altitude of s second ozone maximum , 1992 - 1997 ■LIDAR data ― Polynominal fitting

  8. Fig 4 Seasonal variation of peak concentration o of second ozone maximum , 1992 - 1997 ■LIDAR data ― Polynominal fitting

  9. Fig 5 Ozone sonde Flight , d Averaged 15 Second intervals OZ980520 OZ980603

  10. Fig 6 Frequency of second ozone maximum m measurement from 1992-1997 Number of Second Maximum Measurements Number of Measurements Frequency =

  11. Fig 7 Weather map in Conditions of S Second ozone maximum April 25, 1993 January 22, 1997

  12. Fig 8 Temperature in the range of s second ozone maximum CIRA86 – Northern Hemisphere Mean data ( 35 N )

  13. Environmental Conditions for Second ozone maximum • Jet-Stream over 30 km ms-1 from South to East passed Korean peninsular. • Low-pressure at ground level before the second maximum. • Increase of temperature in lower stratosphere. • Isentropic potential vorticity anomaly should be consider.

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