Bibliography



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Found 2 entries in the Bibliography.


Showing entries from 1 through 2


2021

Ionosphere and Thermosphere Coupling at Mid- and Subauroral Latitudes

This chapter addresses the ionosphere–thermosphere (I/T) coupling phenomena. We define I/T coupling as the dynamical interaction between plasma and neutral particles in the upper atmosphere. This interaction involves the ionosphere response to changes in the thermospheric wind, composition, and temperature, and how the thermosphere dynamics and thermal state are affected by plasma electrodynamics, which may well be under the influence of magnetosphere–ionosphere coupling. It has been the main research focus for decades and will continue to be the center of aeronomy study. The ultimate sources driving dynamical I/T variations may be classified into origins from “above” (the sun, interplanetary, and magnetosphere) and from “below” (the low atmosphere, solid earth surface, and beneath). The cause-effect pathways have been presented in many previous studies covering broad research topics. here we provide only a few I/T coupling phenomena with a focus primarily on mid- and subauroral latitude processes to demonstrate recent progress and new understanding in several research frontiers. Topics covered include specifically ionospheric longitudinal variation morphology (from continental to global scales); neutral wind (especially zonal wind) effects on ionospheric longitudinal variations; important processes for the summer nighttime ionosphere; typical stormtime I/T coupling processes; high latitude winds; and stormtime subauroral I/T coupling phenomena.

Zhang, Shun-Rong;

Published by:       Published on:

YEAR: 2021     DOI: 10.1002/9781119815617.ch15

ionosphere–thermosphere coupling; ionospheric dynamics; ionospheric responses; subauroral latitudes; thermospheric neutral winds; thermospheric variations

2019

Global-scale Observations of the Equatorial Ionization Anomaly

Abstract The National Aeronautics and Space Administration Global-scale Observations of the Limb and Disk ultraviolet spectrograph has been imaging the equatorial ionization anomaly (EIA), regions of the ionosphere with enhanced electron density north and south of the magnetic equator, since October 2018. The initial 3 months of observations was during solar minimum conditions, and they included observations in December solstice of unanticipated variability and depleted regions. Depletions are seen on most nights, in contrast to expectations from previous space-based observations. The variety of scales and morphologies also pose challenges to understanding of the EIA. Abrupt changes in the EIA location, which could be related to in situ measurements of large-scale depletion regions, are observed on some nights. Such synoptic-scale disruptions have not been previously identified.

Eastes, R.; Solomon, S.; Daniell, R.; Anderson, D.; Burns, A.; England, S.; Martinis, C.; McClintock, W.;

Published by: Geophysical Research Letters      Published on:

YEAR: 2019     DOI: https://doi.org/10.1029/2019GL084199

Equatorial ionosphere; ionospheric irregularities; ionospheric dynamics; Ionospheric storms; forecasting; airglow and aurora



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