High resolution measurements in the summer polar mesosphere

Details High resolution measurements in the summer polar mesosphere High resolution measurements in the summer polar mesosphere

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1115r&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 9, p. 1115-1118

Physics

7

Meteorology And Atmospheric Dynamics: Mesospheric Dynamics, Meteorology And Atmospheric Dynamics: Waves And Tides, Meteorology And Atmospheric Dynamics: Remote Sensing

Scientific paper

VHF radar measurements with high temporal and vertical resolution of 4 s and 75 m, respectively, have been carried out in northern Norway (69°N) in the summer of 1987 to study the structure of polar mesospheric summer echoes as well as dynamical processes involved. The results, which have been analysed using bispectral methods, reveal nonlinear interactions to exist in the gravity wave period range. Iso-lines of conserved quantities deduced from the vertical velocity field show strong resemblance with simultaneously observed echo power variations. The results indicate a correlation between signal-to-noise ratio and the vertical gradient of the temperature.

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