HR: 0800h
AN: SA21A-0336    [Abstracts]
TI: Investigation of Mesospheric Metal Emission Signals From SCIAMACHY Limb Measurements
AU: * Scharringhausen, M
EM: marco.scharringhausen@iup.physik.uni-bremen.de
AF: University of Bremen, Institute of Environmental Physics, Otto-Hahn-Allee 1, Bremen, 28359 Germany
AU: Sinnhuber, M
EM: miriam@iup.physik.uni-bremen.de
AF: University of Bremen, Institute of Environmental Physics, Otto-Hahn-Allee 1, Bremen, 28359 Germany
AU: Burrows, J
EM: burrows@iup.physik.uni-bremen.de
AF: University of Bremen, Institute of Environmental Physics, Otto-Hahn-Allee 1, Bremen, 28359 Germany
AU: Aikin, A
EM: a.aikin@att.net
AF: The Catholic University of America, 620 Michigan Ave., Washington, DC, 20064 United States
AB: First preliminary results of global UV dayglow measurements of metallic species like Mg, Fe and Na as well as their ionic counterparts, and Si and Si+ are presented. These measurements are currently undertaken by the SCIAMACHY instrument operated onboard the European research satellite ENVISAT. SCIAMACHY covers the wavelength range from 220 to 2380 nm with a spectral resolution of 0.2 to 1.5 nm and provides nadir, limb and occultation viewing modes. The metal signals observed occur in the wavelength range 220-310 nm. The limb viewing mode covers altitude levels from 0 to 100 km, whereas the nadir mode provides total columns ranging from ground to the exosphere; however, in the wavelength region of metallic emissions, due to atmospheric opacity no information is contained in measurements below ~ 60 km. Vertical profiles of concentrations are obtained from Limb measurements by modelling the excitation process for all limb levels above ~ 60km. Regarding metallic species, very few other measurements exist. Here, we report the first measurements of altitude profiles of Mg, Mg+, Si and Si+ made by a satellite-borne instrument.
UR: http://www.iup.physik.uni-bremen.de/~miriam/sciametals.html
DE: 3332 Mesospheric dynamics
DE: 3360 Remote sensing
DE: 0310 Airglow and aurora
SC: SPA-Aeronomy [SA]
MN: 2004 AGU Fall Meeting