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[A-3.1 Studies on deriving aerosol optical properties using solar occultation ozone sensors data]

[Contact Person]

Yasuhiro Sasano
Head, Satellite Remote Sensing Research Team
Global Environment Division
National Institute for Environmental Studies
Environment Agency
16-2, Onogawa, Tsukuba, Ibaraki 305 Japan
Tel:+81-298-5-2444 Fax:+81-298-50-2569
E-mail:sasano @ nies. go.jp

[Total Budget for FY1995-1997]

31,448,000Yen (FY1997; 12,176,000Yen)

[Abstract]

In the signal processing of data obtained by the infrared spectrometer of the Improved Limb Atmospheric Spectrometer (TEAS), corrections must be made for the continuous absorption spectral components originating from aerosols/PSCs (polar stratospheric clouds) from those originating from gas. Such continuous absorption spectra can provide type identification of aerosols/PSCs. The simulations showed that the proposed method for correction is capable of identifying aerosols/PSCs types and estimating particle-size distribution parameters. For actual LAS data, however, this method could not work well because of the offset components due to yet-unknown causes. As a realistic means, the non-gaseous components were approxomated by a linear interpolation of extinctions at the window channels, which proved to provide reasonable corrections.

[Key Words]

solar occultation, stratospheric ozone layer, aerosol, polar stratospheric clouds, LAS, Improved Limb Atmospheric Spectrometer