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kohei HONDA Regional Radiation Center (RRC) II (Asia)

Average vertical distribution of aerosols over Atmospheric Environment Observatory aquired by operational lidar system of JMA. kohei HONDA Regional Radiation Center (RRC) II (Asia) Global Environment and Marine Department Japan Meteorological Agency (JMA). JMA Observation station for aerosol.

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kohei HONDA Regional Radiation Center (RRC) II (Asia)

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  1. Average vertical distribution of aerosols over Atmospheric Environment Observatory aquired by operational lidar system of JMA kohei HONDA Regional Radiation Center (RRC) II (Asia) Global Environment and Marine DepartmentJapan Meteorological Agency (JMA) IPC-X / Japan

  2. JMA Observation station for aerosol Phyrheriometers(14station） 1932～ Sunphotometer（3station） Ryori1988/1～ Minamitorishima 1995/1～ Yonagunijima 1998/1～ Aerosol Lidar Ryori2002/3～ Product Scattering Ratio Depolarization Ratio Extinction coefficient Observation time 02-04, 08-09, 14-15, 20-22 (JST) Total 6hours/day IPC-X / Japan

  3. Transmitter Type Flashlamp pumped Q-switch Nd:YAG Wavelength (nm) 532 Pulse energy (mJ) 300 Pulse repetition (Hz) 10 Beam divergence (mrad) 0.12 Receiver Lower atmosphere Upper atmosphere Telescope diameter (mm) 280 355 Field of view (mrad) 0.3-3.0 0.3-3.0 Polarization P and S P and S Raman wavelength (nm) 607 Photomultiplier tube R3234-01 (@532 nm) R3237-01 (@607 nm) Signal Processor Analog Photon counting Sampling rate (MHz) 20 20 A/D resolution 12 bit JMA’s Observational lidar system specifications IPC-X / Japan

  4. JMA’s operational lidar system bloc diagram IPC-X / Japan

  5. Daily schedule and its time sequences of lidar operation IPC-X / Japan

  6. Forest fire 23 / 5 /2003 Clear day 10 / 5 / 2005 Yellow sand 1 / 5 / 2005 An example of one-day quick-looking image IPC-X / Japan

  7. Data selection (Vertical profiles of 3-month averaged scattering ratio) • Night data • No cloud day data(sky clear) • Event data was delete • yellow sand & forest fire • Vertical resolution : 150m IPC-X / Japan

  8. Characteristic of data (Vertical profiles of 3-month averaged scattering ratio) • Autumn&Winter：aerosols is few • Spring: middle troposphere was large • Summer: boundary layer was large • All seasons: The stratosphere aerosols is very few. IPC-X / Japan

  9. Conclusion • Average vertical distribution of aerosols data was characteristic at the seasons. • Near future analysis of anther data. (satellite,sunphotometers ・　・　・stc. data） • JMA is now planning to submit our aerosol lidar data to the World Data Centre for Aerosols (WDCA). 【Data publication】 • [Annual Report on Atmospheric and Marine Environment Monitoring] IPC-X / Japan

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