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2016 ; 43
(23
): 11979-11986
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Sources of cosmic dust in the Earth s atmosphere
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Carrillo-Sánchez JD
; Nesvorný D
; Pokorný P
; Janches D
; Plane JM
Geophys Res Lett
2016[Dec]; 43
(23
): 11979-11986
PMID28275286
show ga
There are four known sources of dust in the inner solar system: Jupiter Family
comets, asteroids, Halley Type comets, and Oort Cloud comets. Here we combine the
mass, velocity, and radiant distributions of these cosmic dust populations from
an astronomical model with a chemical ablation model to estimate the injection
rates of Na and Fe into the Earth's upper atmosphere, as well as the flux of
cosmic spherules to the surface. Comparing these parameters to lidar observations
of the vertical Na and Fe fluxes above 87.5?km, and the measured cosmic spherule
accretion rate at South Pole, shows that Jupiter Family Comets contribute
(80?±?17)% of the total input mass (43?±?14?t?d(-1)), in good accord with Cosmic
Background Explorer and Planck observations of the zodiacal cloud.