Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsa41c..03g&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SA41C-03
Physics
0305 Aerosols And Particles (0345, 4801), 0340 Middle Atmosphere: Composition And Chemistry, 6015 Dust
Scientific paper
Improved understanding of the fate of meteoric material in the Earth's atmosphere requires collaboration between a wide range of scientific disciplines. Much progress has been made in recent years concerning meteoroid influx, ablation processes and subsequent chemistry. The present study contributes to these research efforts by providing a global climatology of the mesospheric sodium layer. We present data from the OSIRIS optical spectrometer onboard the Swedish Odin satellite. Limb scattering profiles from the sodium layer are observed at the atomic Na D resonance lines near 590 nm. A detailed forward model for the resonance radiative transfer has been developed; profiles of sodium number density are retrieved using an Optimal Estimation Method (OEM). Retrieved profiles reveal the seasonal and latitudinal dependence of the sodium layer. These are compared to local climatologies of lidar measurements. Complementary model simulations are based on comprehensive new laboratory results on mesospheric sodium chemistry.
Fan Laiyao
Gumbel Jörg
Karlsson Bodil
Murray Brian
Plane John
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