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[Ａ−３.６　Validation of satellite data such as ILAS and its application to middle atmospheric environmental studies]

[Contact person]

[Total Budget for FY1999-2000]

　40,906,000 Yen
　(FY 2000; 20,042,000 Yen)

［Abstract］

　It is indispensable to validate satellite observational data on atmospheric parameters, such as mixing ratio of minor species or temperature and pressure, in order to make better use of them for scientific studies. ILAS Version 5.20 data products of O₃, NO₂, and HNO₃ were validated using ozonesonde, balloon, aircraft, and other satellite data. Then, Arctic chemical ozone loss amount in 1996/1997 winter to spring was estimated using a trajectory analysis applied to the ILAS data. Year-to-year variation of descent rates of airmass inside the Antarctic polar vortex was estimated using the HALOE CH₄ data. Relationship between planetary wave activity and total ozone amount was also investigated. Global distribution and seasonal characteristics of gravity waves were investigated using the GPS/MET data.

［Key Words］

　satellite sensor, ILAS, minor species, polar vortex, gravity wave