Investigation of Mesospheric Metal Emission Signals From SCIAMACHY Limb Measurements

Details Investigation of Mesospheric Metal Emission Signals From SCIAMACHY Limb Measurements Investigation of Mesospheric Metal Emission Signals From SCIAMACHY Limb Measurements

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa21a0336s&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SA21A-0336

Other

3332 Mesospheric Dynamics, 3360 Remote Sensing, 0310 Airglow And Aurora

Scientific paper

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.

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