Periodicities in energy dissipation rates in the auroral mesosphere/lower thermosphere

It is possible for medium-frequency (MF) radar systems to estimate kinetic energy dissipation rates by measuring signal fading times. Here, we present approximately 5 years of such results from Tromsø (69° N, 19° E) and in particular, investigate the periodicities present at different altitudes in t...

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Bibliographic Details
Main Authors: Hall, Chris, Nozawa, S., Meek, C.E., Manson, A.H., Luo, Yi
Format: Article in Journal/Newspaper
Language:English
Published: European Geosciences Union 2003
Subjects:
VDP::Matematikk og naturvitenskap: 400::Fysikk: 430
VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Meteorologi: 453
Meteorology and atmospheric dynamics
climatology
middle atmosphere dynamics
turbulence
Tromsø
Online Access:https://hdl.handle.net/10037/577
Description
Summary:It is possible for medium-frequency (MF) radar systems to estimate kinetic energy dissipation rates by measuring signal fading times. Here, we present approximately 5 years of such results from Tromsø (69° N, 19° E) and in particular, investigate the periodicities present at different altitudes in the regime 80 to 100 km. We detect the known annual variation in the mesosphere and the semiannual variation on the lower thermosphere. In addition, other features are observed including terannual and ~ 27-day components in the lower thermosphere.

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