A mesospheric ozone profile at sunset

Mesospheric Ozone Density Profile in the Polar Region.

“…11. All of the altitude distributions are in good agreement above about 80 km except for that of Yamamoto et al (1983). The model and Week et al's profiles have a significant departure from the present ones about the magnitude of the minimum ozone.…”

“…The ozone densities at the secondary maximum in mid-latitudes are nearly the same as the present results, they are (3-7) x 107 cm-3. Though the result obtained by Weeks et al (1978) has the valley at 81 km, there is no valley in that by Yamamoto et al (1983). The model prediction in mid-latitude (Allen et al, 1984) is also shown in Fig.…”

“…The 1270 nm method provided the ozone densities in 70-100 km. Yamamoto et al (1983) reported the ozone profile obtained in January at KSC, Japan (31'N) from the 1270 nm and solar UV radiation data. They are shown in Fig.…”

“…JH(z), the number of ozone dissociation per second per molecule in Hartley band, is calculated by using the cross section data of Molina and Molina (1986), the solar flux data of Mount and Rottman (1983) and the ozone concentration profiles of Krueger and Minzner (1976) in 50-68 km, Yamamoto et al (1983) in 70-88 km and Allen et al (1984) in 90-104 km. The calculated profiles of JH(z) for the S-310-22 (SZA = 89°) and the S-310-23 (SZA = 90°) are shown in Fig.…”

“…The 1270 nm method is believed in to provide the most accurate ozone distribution in the altitude region above about 70 km. There are not so many mesospheric ozone observations by using the 1270 nm method onboard scientific rockets (for example, Evans and Llewellyn, 1972;Yamamoto et al, 1983;Batista etal.,1996). In polar region, only the observation by Llewellyn and Witt (1977) provides the density profile of the mesospheric ozone.…”