HR: 14:10h
AN: SA33A-03    [Abstracts]
TI: The Seasonal and Latitudinal Variation of the OH (v = 0) Concentration in the Mesosphere
AU: * Llewellyn, E J
EM: edward.llewellyn@usask.ca
AF: University of Saskatchewan, ISAS 116 Science Place University of Saskatchewan, Saskatoon, SK S7N 5E2 Canada
AB: The OSIRIS instrument on the Odin satellite makes limb measurements of both the scattered sunlight and the airglow. While the intensity of the 300 nm scattered spectrum is large in the mesosphere it is possible to extract the signal from the NO-g and the OH (A X) bands, both systems arise from solar fluorescence although the driving wavelengths are quite disparate. For the OH emission the line-of-sight limb radiances are retrieved and converted to OH (v = 0) concentration profiles. These profiles exhibit a strong daytime variation dependent on altitude, latitude and season. In this paper some of these new findings are presented and their association with variations in the mesospheric water content discussed.
DE: 0310 Airglow and aurora
DE: 0317 Chemical kinetic and photochemical properties
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: SPA-Aeronomy [SA]
MN: 2005 Joint Assembly