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B-8.3 Studies on Chemical Composition and Optical Character for Aerosol Particles in Troposphere.

[Contact Person]

Hidenori Yoshiyama
Air Quality Measurement Div., Atmospheric Environmental
Protection Dept.,
National Institute for Resources and Environment
16-3 Onogawa,Tsukuba,Ibaraki 305, Japan
Tel/Fax:0298-58-8283 E-mail:yoshiyama@nies.go.jp

Total Budget for FY1996- 1998;

24,000,000 Yen (FY1998 ; 7,911,000 Yen)

Abstract

It was confirmed to be able to detect with real-time measurement at lowest concentration 1.2ppb of SO₂, gas. And, it could not to detected the nitrogen monoxide of 20.8ppb and the ammonia of 2.02ppm as the interfering substance. As the ammonium sulfate aerosol was measured, the reaults of this analyzer shown good agreement with an Electrostatic Aerosol Analysis. This results will be present the atmospheric environmental journal.
For the derivation of the optical characteristic of PSL particles, we developed the equipment which measure the scattering pattern. And, the size of PSL particles were derived by the regression analysis between the theory and the measurement data about extreme angles. The size and the refractive index about the smoke particle of mosquito coil were presumed within the range of 1.55-1.56 for real part.
In full consideration of the composition and number concentration of the troposphere aerosol, numerical analysis regarding the radiation budget of global scale for various physical factors was carried out, and it is found that the scattering effect of the interrupt of direct radiation influences stronger than the green house effect produced by troposphere aerosol.

[Key Words]

Aerosol, Composition analysis, Optical charactor, Temperature change,