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Ann. Geophys., 20, 1857-1862, 2002
www.ann-geophys.net/20/1857/2002/
© European Geosciences Union 2002
On the influence of neutral turbulence on ambipolar diffusivities deduced from meteor trail expansion
C. M. Hall
Tromsø Geophysical Observatory, Tromsø, Norway
Correspondence to: C. M. Hall (chris.hall@tgo.uit.no)
Abstract. By measuring fading times
of radar echoes from underdense meteor trails, it is possible to deduce the
ambipolar diffusivities of the ions responsible for these radar echoes. It
could be anticipated that these diffusivities increase monotonically with
height akin to neutral viscosity. In practice, this is not always the case.
Here, we investigate the capability of neutral turbulence to affect the meteor
trail diffusion rate.
Key words. Meteorology and atmospheric dynamics
(middle atmosphere dynamics; turbulence)
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