Studies of high latitude mesospheric turbulence by radar and rocket. II - Measurements of small scale turbulence

Details Studies of high latitude mesospheric turbulence by radar and rocket. II - Measurements of small scale turbulence Studies of high latitude mesospheric turbulence by radar and rocket. II - Measurements of small scale turbulence

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50..963b&link_type=abstract

(IAGA, Symposium on Coupling, Energetics, Dynamics and Electrodynamics of Atmospheric Regions, Vancouver, Canada, Aug. 1987) Jou

Computer Science

Sound

13

Atmospheric Turbulence, Electrostatic Probes, Gravity Waves, Ion Density (Concentration), Mesosphere, Polar Regions, Alaska, Radar Tracking, Rocket Sounding, Wave Propagation

Scientific paper

Measurements of mesospheric small scale turbulence and associated larger scale wave structures were obtained from rocket probe flights during equinox in spring 1985. The measurements were verified by data from the mesosphere-stratosphere-troposphere radar at Poker Flat, Alaska. Electron density irregularities down to an altitude of about 62 km and fluctuations in positive ion density in the altitude region from 50 to 90 km were measured. Turbulence in the inertial subrange was observed at heights where the fluctuations generally were largest. Measurement of background electron density exhibited gradients relative to the monotonically increasing density profile, suggesting the presence of large amplitude wave motions transporting the plasma by mixing. The radar detected the occurrence of 1-3 km wavelike perturbations superimposed on a 7-km wave in the wind velocity field. It is suggested that the 1-3 km waves are more important in the transport of energy and momentum and in the production of turbulence in the lower mesosphere.

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