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[A-1.2 Experimental Study of Airborne Infrared Remote-Sensing for the Ozone-layer Chemistry(Final Report)]

[Contact Person]

Yukio Makino
Head of the Third Laboratory
Physical Meteorology Research Department
Meteorological Research Institute
Japan Meteorological Agency
Nagamine 1-1, Tsukuba, Ibaraki, 305 Japan
Tel:+81-298-53-8708 Fax:+81-298-55-9971
E-mail: ymakino@mri-jma.go.jp

[Total Budget for FY1993-FY1995]

112,105,000 Yen(FY1995;30,030,000 Yen)

[Abstract]

　A Fourier-transform infrared spectrometer with resolution of 0.02cm^-1 was used for experiments to measure the solar spectra on board aircraft. The spectra, which were obtained through a ZnS or ZnSe infrared window, were analyzed with a new developed least square fitting method to deduce the equivalent width of HCl and HF absorption lines at 2925. 9cm^-1 and 4038.95cm^-1, respectively, and normalized for the vertical column density. The measured line shape was under constraint of the limited resolution of the instrument, i.e., 0.02cm^-1. The latitudinal distribution of the equivalent width showed increasing feature of total HCl and HF toward the higher latitudes. The diurnal change was large at the northern part of Japan. The results of this work showed no indication of the lack of stratospheric HCI over the mid-latitudes due to the heterogeneous chemical processes occurred in the polar stratosphere.

[Key Words]

Aircraft Experiment, Infrared Spectroscopy, Ozone-Layer, Stratospheric HCl, Stratospheric HF