Decay of whistler-induced electron precipitation and cloud-ionosphere electrical discharge Trimpis: observations and analysis

Dowden, Richard; Rodger, Craig; Brundell, James; Clilverd, Mark ORCID: https://orcid.org/0000-0002-7388-1529. 2001 Decay of whistler-induced electron precipitation and cloud-ionosphere electrical discharge Trimpis: observations and analysis. Radio Science, 36 (1). 151-169. https://doi.org/10.1029/1999RS002297

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Abstract/Summary

There are two distinctly different causes of phase and amplitude perturbations of subionospheric VLF transmissions (termed “Trimpis”): (1) ionization enhancement in the ionospheric D region due to whistler-induced electron precipitation (WEP) and (2) modifications to the ionosphere induced directly by lightning. The latter appear to be subdivided into ionization anomalies produced by cloud-ionosphere electrical discharge (CID), or “red sprites,” and heating anomalies which may not involve ionization at all. Here we consider only Trimpis (WEP and CID) produced by ionization and find that the magnitude of the Trimpi perturbation (which includes both the amplitude and phase perturbations) of both Trimpi types decays logarithmically rather than exponentially with time. While this has been previously shown for CID Trimpis, the decay of WEP Trimpis was previously thought to be exponential.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1029/1999RS002297
Programmes:	BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Geospace Atmosphere Transfer Functions
ISSN:	0048-6604
Date made live:	02 Jul 2012 10:24 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/18575

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