UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Effects of a mid-latitude solar eclipse on the thermosphere and ionosphere - A modelling study

Muller-Wodarg, ICF; Aylward, AD; Lockwood, M; (1998) Effects of a mid-latitude solar eclipse on the thermosphere and ionosphere - A modelling study. Geophysical Research Letters , 25 (20) 3787 - 3790. 10.1029/1998GL900045. Green open access

[img]
Preview
PDF
1998GL900045.pdf
Available under License : See the attached licence file.

Download (486kB)

Abstract

A modelling study is presented which investigates in-situ generated changes of the thermosphere and ionosphere during a solar eclipse. Neutral temperatures are expected to drop by up to 40 degrees K at 240 km height in the totality footprint, with neutral winds of up to 26 m/s responding to the change of pressure. Both temperatures and winds are found to respond with a time lag of 30 min after the passing of the Moon's shadow. A gravity wave is generated in the neutral atmosphere and propagates into the opposite hemisphere at around 300 m/s. The combined effects of thermal cooling and downwelling lead to an overall increase in [O], while [N-2] initially rises and then for several hours after the eclipse is below the "steady state" level. An enhancement of [NmF2] is found and explained by the atmosphere's contraction during, and the reduced [O]/[N-2] ratio after the eclipse.

Type: Article
Title: Effects of a mid-latitude solar eclipse on the thermosphere and ionosphere - A modelling study
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/1998GL900045
Publisher version: http://dx.doi.org/10.1029/1998GL900045
Language: English
Additional information: Copyright 1998 by the American Geophysical Union
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/100139
Downloads since deposit
119Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item