Yasuaki Ito¹, Akiyoshi Matsuzaki^1,

The action of water vapor on the stratospheric ozone chemistry is studied in the low latitude region and the Polar Regions with the data of the solar-occultation infrared spectrometers LAS boarding the satellite OHZORA (EXOS-C) and ILAS boarding the satellite Midori (ADEOS), respectively. The study in the low latitude region with the LAS data on 4 April 1984 indicates the clear anti-correlation between the water vapor and ozone concentrations at the altitudes of 30 and 40 km, where the ultraviolet-photochemical reactions are very active, and the less clear one at 20 and 10 km, where they are rather inactive. Furthermore the longitudinal distribution of the stratospheric ozone suggests that it is affected by the interaction between the up-stream of water vapor and the tropospheric northern wind in the present case. These facts are discussed by the ozone chemistry with the HO_x catalytic chemistry. On the other hand, the present study on the stratospheric ozone chemistry in the Polar Regions with use of the ILAS data also finds the evident anti-correlation between the water vapor and ozone concentrations, as well as the evident altitude dependence of the stratospheric ozone chemistry and an evident difference in the stratospheric chemistry inside and outside Ozone Holes. These facts are discussed by the ozone chemistry with the HO_x catalytic chemistry and the ozone chemistry with the polar stratospheric clouds, which includes the HO_x, NO_x, and ClO_x catalytic chemistry. Furthermore, we try to add the total ozone longitudinal circular maps in the regions, where NASA’s TOMS total ozone maps are unavailable in the winter seasons in the Polar Regions, by using the ILAS data observed on the boundaries between the day and night sides. As a result, we succeed in providing the NASA’s TOMS maps with the total column ozone circular maps by the ILAS data.

stratospheric ozone, water vapor, Ozone Hole, LAS, ILAS, ILAS-II