Upper thermospheric ion-neutral coupling from combined optical and radar experiments over Svalbard
The response of thermospheric neutral parameters such as winds and temperatures to rapid changes in geophysical conditions has usually been considered to be relatively slow, on the order of hours, and steady, representing an integration of more rapid ionospheric changes. Quantifying the relevant ion...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:144955 2023-05-15T16:04:44+02:00 Upper thermospheric ion-neutral coupling from combined optical and radar experiments over Svalbard Griffin, EM Aruliah, AL McWhirter, I Yiu, HCI Charalambous, A 2009 http://discovery.ucl.ac.uk/144955/ unknown COPERNICUS PUBLICATIONS open ANN GEOPHYS-GERMANY , 27 (11) 4293 - 4303. (2009) Ionosphere Ionosphere-atmosphere interactions Polar ionosphere Meteorology and atmospheric dynamics Thermospheric dynamics AERONOMICAL MEASUREMENTS MODEL VARIABILITY ATMOSPHERE EISCAT FIELD Article 2009 ftucl 2016-01-15T03:29:53Z The response of thermospheric neutral parameters such as winds and temperatures to rapid changes in geophysical conditions has usually been considered to be relatively slow, on the order of hours, and steady, representing an integration of more rapid ionospheric changes. Quantifying the relevant ion-neutral coupling has proved difficult due to a lack of relevant laboratory data for the most important collisions, namely between neutral atomic oxygen and its first ion. As a result the representation of ion-neutral coupling in numerical models of the upper atmosphere has often produced poor comparison to experimental data. Using a unique combination of spatially extended ion and neutral thermospheric parameters we show that the neutral response can be very rapid, within 15 min, to imposed forcing via ion-neutral coupling. The array of complementary instrumentation measuring the thermosphere above Svalbard in the Northern Hemisphere allows detailed study of the causes and effects from both the ion and neutral perspectives. The implications for development and testing of the thermospheric numerical models is discussed. Article in Journal/Newspaper EISCAT Svalbard University College London: UCL Discovery Svalbard |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
Ionosphere Ionosphere-atmosphere interactions Polar ionosphere Meteorology and atmospheric dynamics Thermospheric dynamics AERONOMICAL MEASUREMENTS MODEL VARIABILITY ATMOSPHERE EISCAT FIELD |
spellingShingle |
Ionosphere Ionosphere-atmosphere interactions Polar ionosphere Meteorology and atmospheric dynamics Thermospheric dynamics AERONOMICAL MEASUREMENTS MODEL VARIABILITY ATMOSPHERE EISCAT FIELD Griffin, EM Aruliah, AL McWhirter, I Yiu, HCI Charalambous, A Upper thermospheric ion-neutral coupling from combined optical and radar experiments over Svalbard |
topic_facet |
Ionosphere Ionosphere-atmosphere interactions Polar ionosphere Meteorology and atmospheric dynamics Thermospheric dynamics AERONOMICAL MEASUREMENTS MODEL VARIABILITY ATMOSPHERE EISCAT FIELD |
description |
The response of thermospheric neutral parameters such as winds and temperatures to rapid changes in geophysical conditions has usually been considered to be relatively slow, on the order of hours, and steady, representing an integration of more rapid ionospheric changes. Quantifying the relevant ion-neutral coupling has proved difficult due to a lack of relevant laboratory data for the most important collisions, namely between neutral atomic oxygen and its first ion. As a result the representation of ion-neutral coupling in numerical models of the upper atmosphere has often produced poor comparison to experimental data. Using a unique combination of spatially extended ion and neutral thermospheric parameters we show that the neutral response can be very rapid, within 15 min, to imposed forcing via ion-neutral coupling. The array of complementary instrumentation measuring the thermosphere above Svalbard in the Northern Hemisphere allows detailed study of the causes and effects from both the ion and neutral perspectives. The implications for development and testing of the thermospheric numerical models is discussed. |
format |
Article in Journal/Newspaper |
author |
Griffin, EM Aruliah, AL McWhirter, I Yiu, HCI Charalambous, A |
author_facet |
Griffin, EM Aruliah, AL McWhirter, I Yiu, HCI Charalambous, A |
author_sort |
Griffin, EM |
title |
Upper thermospheric ion-neutral coupling from combined optical and radar experiments over Svalbard |
title_short |
Upper thermospheric ion-neutral coupling from combined optical and radar experiments over Svalbard |
title_full |
Upper thermospheric ion-neutral coupling from combined optical and radar experiments over Svalbard |
title_fullStr |
Upper thermospheric ion-neutral coupling from combined optical and radar experiments over Svalbard |
title_full_unstemmed |
Upper thermospheric ion-neutral coupling from combined optical and radar experiments over Svalbard |
title_sort |
upper thermospheric ion-neutral coupling from combined optical and radar experiments over svalbard |
publisher |
COPERNICUS PUBLICATIONS |
publishDate |
2009 |
url |
http://discovery.ucl.ac.uk/144955/ |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_source |
ANN GEOPHYS-GERMANY , 27 (11) 4293 - 4303. (2009) |
op_rights |
open |
_version_ |
1766400353519009792 |