Articles | Volume 18, issue 20
Atmos. Chem. Phys., 18, 14799–14811, 2018
https://doi.org/10.5194/acp-18-14799-2018

Special issue: Layered phenomena in the mesopause region (ACP/AMT inter-journal...

Atmos. Chem. Phys., 18, 14799–14811, 2018
https://doi.org/10.5194/acp-18-14799-2018
Research article
16 Oct 2018
Research article | 16 Oct 2018

A new model of meteoric calcium in the mesosphere and lower thermosphere

John M. C. Plane et al.

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Short summary
Meteoric ablation creates layers of metal atoms in the atmosphere around 90 km. Although Ca and Na have similar elemental abundances in most minerals found in the solar system, surprisingly the Ca abundance in the atmosphere is less than 1 % that of Na. This study uses a detailed chemistry model of Ca, largely based on laboratory kinetics measurements, in a whole-atmosphere model to show that the depletion is caused by inefficient ablation of Ca and the formation of stable molecular reservoirs.
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