Latitudinal dependence of the variability of the micrometeor altitude distribution

Details Latitudinal dependence of the variability of the micrometeor altitude distribution Latitudinal dependence of the variability of the micrometeor altitude distribution

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3612105s&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 12, CiteID L12105

Physics

2

Planetary Sciences: Comets And Small Bodies: Physics And Chemistry Of Materials, Planetary Sciences: Solar System Objects: Meteors, Atmospheric Processes: Remote Sensing, Interplanetary Physics: Interplanetary Dust, Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334)

Scientific paper

We present a study of the diurnal behavior of the observed meteor altitude distribution at different seasons and latitudes. The meteor altitude distribution provides an indication of where the meteoric mass deposition occurs in the mesosphere and lower thermosphere (MLT). This can be utilized to model the input of metallic constituents into the MLT and accurately understand the chemistry of this region. We show that the observed altitude distributions have distinct variability at each location: at high latitudes there is a weak diurnal and strong seasonal variability while at tropical latitudes the opposite behavior is observed. We explain these results by correlating them with the astronomical and physical properties of the meteoric flux. Finally, we discussed the potential influences that these results have on the metal chemistry and aeronomy of this atmospheric region.

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