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[A-1.1.3 Studies on Development of Retrieval Method of Atmospheric Minor Constituents by the Infrared Heterodyne Spectroscopy]

[Contact Person]

Hiroshi Fukunishi
Professor
Department of Astrophysics and Geophysics
Faculty of Science, Tohoku University
Aramaki Aoba, Sendai 980-77 Japan
Tel: +81-22-217-6734 Fax: +81-22-217-6739
E-mail: fuku@stpp2.geophys.tohoku.ac.jp

[Total Budget for FY1994-FY1996]

13,711,000 Yen (FY1996; 4,364,000 Yen)

[Abstract]

　Observations of infrared absorption lines of nitrous oxide were made with a laser heterodyne spectrometer in Sendai in 1994. A retrieval method to obtain vertical profiles and total column densities of nitrous oxide was developed and errors in in the retrieval were precisely examined by computer simulations. From observations by a new laser heterodyne spectrometer in Antarctica, we have obtained high-resolution infrared spectra of ozone, nitrous oxide, nitric acid and methane. A rapid variation of ozone mixing ratio in the stratosphere during a growth phase of the Antarctic ozone hole is found from consecutive observations with a high time resolution of 10 minutes.

[Key Words]

Atmospheric Minor Constituents, Infrared Spectroscopy, Laser Heterodyne, Spectrometer, Remote Sensing, Ozone Hole