An examination of high latitude upper mesosphere dynamic stability using the Nippon/Norway Svalbard Meteor Radar

Details An examination of high latitude upper mesosphere dynamic stability using the Nippon/Norway Svalbard Meteor Radar An examination of high latitude upper mesosphere dynamic stability using the Nippon/Norway Svalbard Meteor Radar

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29h.121h&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 8, pp. 121-1, CiteID 1280, DOI 10.1029/2001GL014229

Physics

4

Meteorology And Atmospheric Dynamics: Mesospheric Dynamics, Meteorology And Atmospheric Dynamics: Turbulence, Radio Science: Radar Atmospheric Physics

Scientific paper

Using wind measurements from the recently installed Nippon/Norway Svalbard Meteor Radar, (NSMR) at 78°N, 16°E, we have derived wind shears, and, combining these with model Brunt-Väisälä frequencies, have determined estimates of the gradient Richardson Number. These Richardson Number estimates parameterise the degree of stability of the upper mesosphere at a height of around 90 km. We find indications of dynamic instability in spring and autumn, with greater stability in summer.

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