Polarization Analysis and Probable Origin of Bright Noctilucent Clouds with Large Particles in June 2018

A sequence of very bright noctilucent clouds (NLC) was observed in central Russia during the last decade of June, 2018. It followed the meteorite impact 300 km southwards from Moscow in the morning of June 21. Polarization measurements of NLC in a wide range of scattering angles allowed finding the...

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Bibliographic Details
Published in:arXiv.org 2018-08
Main Authors: Ugolnikov, Oleg S, Maslov, Igor A
Format: Article
Language:English
Subjects:
Gravitational waves
Gravity waves
Ice formation
Meteorite collisions
Noctilucent clouds
Polarization
Scattering angle
Water vapor
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Summary:A sequence of very bright noctilucent clouds (NLC) was observed in central Russia during the last decade of June, 2018. It followed the meteorite impact 300 km southwards from Moscow in the morning of June 21. Polarization measurements of NLC in a wide range of scattering angles allowed finding the effective size of ice particles forming the clouds. These estimations together with satellite data on gravity waves, temperature, and water vapor mixing ratio during these days help to understand the basic causes of the observed NLC brightness and particle size anomaly.
ISSN:2331-8422
DOI:10.48550/arxiv.1808.01475