Accession Number:

ADA535001

Title:

Magnesium Chemistry in the Upper Atmosphere

Descriptive Note:

Final rept. 11 Dec 2008-11 Dec 2010

Corporate Author:

LEEDS UNIV (UNITED KINGDOM) SCHOOL OF CHEMISTRY

Personal Author(s):

Report Date:

2010-12-20

Pagination or Media Count:

22.0

Abstract:

Metallic species are deposited into the Earths upper atmosphere by the ablation of approximately 50 tonnes of interplanetary dust that enters the atmosphere each day. The dust undergoes frictional heating to its melting point approx. 1800 K, after which metallic species ablate and are deposited in the mesosphere-lower thermosphere MLT region of the atmosphere 70-120 km. Magnesium is one of the most abundant metals in the MLT, with layers of Mg being observed by rocket-borne mass spectrometry and satellite observations of the earths dayglow.

Subject Categories:

  • Atmospheric Physics
  • Physical Chemistry
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE