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A-1.5.2 Research on Characterization of Polar Stratospheric Clouds CPSCs) and their Heterogeneous Interaction with Halogen Reservoir Molecules

[Contact Person]

Masaru Sato
Excited States Chemistry Division
Atmospheiic Environmental Protection Department
National Institute for Resourccs and Environment
Ministry of Intemational Trade and Industry
16-3 Onogaw, Tsukuba. Ibaraki 305 Japan
Tel:+81-298-58-8264 Fax:+81-298-58-8258
E-mail:masaru@nire.go.jp

Total Budget for FY1996-1998

18,152,000 Yen (FY1998; 5222,000 Yen)

Abstract

We have produced modeled polar stratospheric clouds (PSCs) film that give same infrared spectrum with observed type I PSCs in polar stratosphere (Kinne et al., 1989). The film was characterized as β-type nitric acid trihydrate ( β-NAT) measured by optically transparent configuration of FTIR. The same film gave in-situ observed spectrum when it was configured to reflection measurement As Kramers - Kronig integration of this spectra gave transmittance spectra of β-NAT, it was concluded that reflection spectrum of the film include mainly surface reflection of β-NAT crystals. In spite of reflection spectra of NAT and ice was resembled each other sometimes, we could distinguish them by using Kramers - Kronig integration of spectra

[Key Words]

Polar Stratospheric Clouds (PSCs), FTIR, Reflection Spectrum, NAT