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Solar control of meteor radar rates

Lindblad, Bertil Anders LU (2003) In Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2003, Tatranská Lomnica, Slovak Republic. 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:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Solar Wind, Meteors, Solar Activity Cycles
in
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
2007-09-21 11:57:38
date last changed
2016-10-13 04:46:35
@misc{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},
  editor       = {Wilson, A},
  isbn         = {92-9092-845-X,},
  keyword      = {Solar Wind,Meteors,Solar Activity Cycles},
  language     = {eng},
  pages        = {755--759},
  publisher    = {ARRAY(0xb0f2d00)},
  series       = {Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2003, Tatranská Lomnica, Slovak Republic.},
  title        = {Solar control of meteor radar rates},
  volume       = {ESA SP-535},
  year         = {2003},
}