Solar control of meteor radar rates
(2003) ESA SP-535. p.755-759- Abstract
- Meteor radar observations carried out in August-September 1953-84 at theOnsala Space Observatory in Sweden show long-term, as well as short termvariations in meteor radar rates. These rate variations are associatedwith position in the solar cycle, and with variations in the solar windsector structure. An inverse correlation is found between meteor radarrates and the solar cycle. The magnitude of this effect is quite large;about twice as many radar echoes are observed at solar minimum as atsolar maximum. We propose that this long-term inverse correlation withthe sunspot number is caused by a solar cycle controlled variation ofthe atmospheric density gradient at meteor ablation heights (90-110 km).Day-to-day variations in meteor radar rates,... (More)
- Meteor radar observations carried out in August-September 1953-84 at theOnsala Space Observatory in Sweden show long-term, as well as short termvariations in meteor radar rates. These rate variations are associatedwith position in the solar cycle, and with variations in the solar windsector structure. An inverse correlation is found between meteor radarrates and the solar cycle. The magnitude of this effect is quite large;about twice as many radar echoes are observed at solar minimum as atsolar maximum. We propose that this long-term inverse correlation withthe sunspot number is caused by a solar cycle controlled variation ofthe atmospheric density gradient at meteor ablation heights (90-110 km).Day-to-day variations in meteor radar rates, which correlate withshort-term geomagnetic activity have also been detected. A superposedepoch analysis based on solar wind sector boundaries as key dates showsthat a minimum in meteor radar rates occurs about 3 days after theEarth's passage of a solar wind sector boundary. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/528078
- author
- Lindblad, Bertil Anders LU
- organization
- publishing date
- 2003
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Solar Wind, Meteors, Solar Activity Cycles
- host publication
- Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2003, Tatranská Lomnica, Slovak Republic.
- editor
- Wilson, A
- volume
- ESA SP-535
- pages
- 755 - 759
- publisher
- ESA Publications Division
- external identifiers
-
- wos:000188242400140
- scopus:0141959818
- ISBN
- 92-9092-845-X,
- language
- English
- LU publication?
- yes
- id
- 111c7afb-8c38-455d-89b3-a8178b43ba8c (old id 528078)
- date added to LUP
- 2016-04-04 11:35:19
- date last changed
- 2024-01-13 01:19:58
@inproceedings{111c7afb-8c38-455d-89b3-a8178b43ba8c,
abstract = {{Meteor radar observations carried out in August-September 1953-84 at theOnsala Space Observatory in Sweden show long-term, as well as short termvariations in meteor radar rates. These rate variations are associatedwith position in the solar cycle, and with variations in the solar windsector structure. An inverse correlation is found between meteor radarrates and the solar cycle. The magnitude of this effect is quite large;about twice as many radar echoes are observed at solar minimum as atsolar maximum. We propose that this long-term inverse correlation withthe sunspot number is caused by a solar cycle controlled variation ofthe atmospheric density gradient at meteor ablation heights (90-110 km).Day-to-day variations in meteor radar rates, which correlate withshort-term geomagnetic activity have also been detected. A superposedepoch analysis based on solar wind sector boundaries as key dates showsthat a minimum in meteor radar rates occurs about 3 days after theEarth's passage of a solar wind sector boundary.}},
author = {{Lindblad, Bertil Anders}},
booktitle = {{Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2003, Tatranská Lomnica, Slovak Republic.}},
editor = {{Wilson, A}},
isbn = {{92-9092-845-X,}},
keywords = {{Solar Wind; Meteors; Solar Activity Cycles}},
language = {{eng}},
pages = {{755--759}},
publisher = {{ESA Publications Division}},
title = {{Solar control of meteor radar rates}},
volume = {{ESA SP-535}},
year = {{2003}},
}