Removal of Meteoric Iron on Polar Mesospheric Clouds

John M.C. Plane, Benjamin J. Murray, Xinzhao Chu, Chester S. Gardner

Research output: Contribution to journalArticlepeer-review

Abstract

Polar mesospheric clouds are thin layers of nanometer-sized ice particles that occur at altitudes between 82 and 87 kilometers in the high-latitude summer mesosphere. These clouds overlap in attitude with the layer of iron (Fe) atoms that is produced by the ablation of meteoroids entering the atmosphere. Simultaneous observations of the Fe layer and the clouds, made by lidar during midsummer at the South Pole, demonstrate that essentially complete removal of Fe atoms can occur inside the clouds. Laboratory experiments and atmospheric modeling show that this phenomenon is explained by the efficient uptake of Fe on the ice particle surface.

Original languageEnglish (US)
Pages (from-to)426-428
Number of pages3
JournalScience
Volume304
Issue number5669
DOIs
StatePublished - Apr 16 2004

ASJC Scopus subject areas

  • General

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