1. 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)
IPC-X / Japan

2. JMA Observation station for aerosol
Phyrheriometers(14station）
1932～
Sunphotometer（3station）
Ryori /1～
Minamitorishima 1995/1～
Yonagunijima /1～
Aerosol Lidar
　　　　Ryori　2002/3～
　　　　Product
Scattering Ratio Depolarization Ratio Extinction coefficient
　　　　Observation time
02-04, 08-09, 14-15, (JST)
Total 6hours/day
IPC-X / Japan

3. JMA’s Observational lidar system specifications
A/D resolution
Sampling rate (MHz)
12 bit 20
Photon counting
Analog
Signal Processor
R nm)
R nm)
Photomultiplier tube
607
Raman wavelength (nm)
P and S
Polarization
Field of view (mrad)
355
280
Telescope diameter (mm)
Upper atmosphere
Lower atmosphere
Receiver
0.12
Beam divergence (mrad) 10
Pulse repetition (Hz)
300
Pulse energy (mJ)
532
Wavelength (nm)
Transmitter
Flashlamp pumped Q-switch Nd:YAG
Type
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. An example of one-day quick-looking image
Clear day
10 / 5 / 2005
Yellow sand
1 / 5 / 2005
Forest fire
23 / 5 /2003
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