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A-1.3 Statistical Analyses of Variabilities of the Ozone Layer

[Contact Person]

Masato Shiotani
Professor, Division of Ocean and Atmospheric Sciences
Graduate School of Environmental Earth Science, Hokkaido University
Nishi 5, Kita 10, Kita-ku, Sapporo 060-0810 Japan
Tel: +81-11-706-2366, Fax: +81-11-726-6234
E-mail: shiotani@ees.hokudai.ac.jp

Total Budget for FY1996-FY1998

47,530,000 Yen (FY1998; 15,839,000 Yen)

Abstract

To analyze spatial and temporal variation of the ozone layer, this research aims to clarify the characteristics of the seasonal and annual variation of ozone-related species by means of statistical methods using mainly satellite data, ground-based or balloon-borne insitu data, the meteorological data. We have investigated the effective statistics for analyzing parameters in the ozone layer. Order statistics are effective as indices of a representative value and variation of the parameters. We have newly produced a monthly climatological database in each latitudinal zone by using the UARS sensors' data. By investigating longterm temperature in the lower stratosphere in the wintertime of the northern hemisphere, it was found that the winter in 1996197 was almost cold, and the one in 1997/98 was relatively warmer. The parameters we have analyzed here clearly posed these temperature tendencies. Among these parameters, the data quality analyses about nitric acid (HNO₃) and aerosols related on the satellite sensor Improved Limb Atmospheric Spectrometer (ILAS) have been reported here.

[Key Words]

Stratosphere, Seasonal and annual variation, Satellite data, ILAS