Behavior of sporadic Na layers on small time scale

Details Behavior of sporadic Na layers on small time scale Behavior of sporadic Na layers on small time scale

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71.1374l&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 12, p. 1374-1382.

Physics

Sporadic Na Layers, Small Time Scale, Mesosphere, Lidar Observation

Scientific paper

Seventeen sporadic Na (Nas) layers were observed from ~150 h of the 8-s Na density profiles obtained by lidar measurements at Wuhan, China. Each of them consists of a sequence of small-timescale density enhancement bursts. The burst intensity ranges from 200 to 10,400 cm-3. The burst duration and interval vary between 16 and 112 s. The instantaneous growth and decay rates often have an order of 100 cm-3 s-1. This suggests that there exists a very rapid atom removal process corresponding to the dramatic burst density enhancement if the advection effect by large-scale wind could be ignored. These results provide a new clue for explaining the formation mechanism of sporadic metal layers.

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