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[A-1.3 Spectroscopic Study on the Ozone-layer with an Airborne Fourier-transform Infrared Spectrometer]

[Contact Person]

Yukio Makino
Head of the Third Laboratory
Physical Meteorological Research Department
Meteorological Research institute
Japan Meteorological Agency
1-1 Nagamine, Tsukuba, Ibaraki 305 Japan
Phone +81-298-51-7111(Ext.303), Fax +81-298-51-1449
E-mail ymakino@mri-1.mri-jma.go.jp

[Total Budget for FY1989-1992]

121,405,000 Yen

[Abstract]

　A Fourier-transform infrared spectrometer(FTIR) with resolution of 0.02cm^-1 was used for measuring solar spectra during the aircraft experiments of February and December in 1992. Measurements were made between 25N-45N over Japan. The preliminary results show that the total HCI or equivalent width measured in December, 1992 was larger at the higher latitudes and smaller at the lower latitudes. Total ozone, measured at the same period in Japan, shows same latitudinal tendency, indicating the measured HCI gradient is thought as one of the typical distribution of stratospheric HCI during the chemically non-disturbed condition. In the case of measurement in February, 1992, it is shown that the total HCI in lower latitudes was still similar to the results for December, 1992. However, the total HCI in higher latitudes was much smaller than that in December,1992, indicating any chemical or dynamical disturbance from the average occurred in February, 1992.

[Key Words]

Ozone-Layer, Hydrogen Chloride, Infrared Spectrometer, Aircraft Observation