Observation of pulsating aurora signatures in cosmic noise absorption data
Observation of pulsating aurora signatures in cosmic noise absorption data
This study investigates the contribution of energetic (E > 30 keV) particle precipitation during a pulsating aurora event over Kilpisjärvi (L = 6.2) on 26 February 2014. It is based on the comparison of auroral blue-line emission (427.8 nm) data from an all-sky camera and cosmic noise absorption (CNA) data obtained from a multibeam experiment of the Kilpisjärvi Atmospheric Imaging Receiver Array (KAIRA) riometer. The data sets are compared for three KAIRA beams close to magnetic zenith. Results show a clear correlation between the measured CNA and the auroral blue-line emission during the event, for each beam. In addition, individual pulsations are observed for the first time in the cosmic noise absorption data measured by KAIRA and are found to be close-to-identical to the optical pulsations. This suggests that the modulation of electron precipitation during pulsating aurora takes place in a consistent way over a broad range of energies.
5292-5300
Grandin, M.
286f346c-6496-4f1e-a67a-7f6afe46c8b1
Kero, A.
e6050b4d-d6c3-4ad0-a5db-b20c01264a54
Partamies, N.
17fce18c-77e7-486c-bb53-a6156733fc9f
McKay, D.
b5f038d0-4477-4d5c-9655-1310120e13b2
Whiter, Daniel
9a30d7b6-ea41-44fb-bd52-3ff1964eca5c
Kozlovsky, A.
effeb236-e851-49d9-a951-58d3979b16ad
Miyoshi, Y.
93d5fd61-fd86-4706-896b-0f4b875efa74
16 June 2017
Grandin, M.
286f346c-6496-4f1e-a67a-7f6afe46c8b1
Kero, A.
e6050b4d-d6c3-4ad0-a5db-b20c01264a54
Partamies, N.
17fce18c-77e7-486c-bb53-a6156733fc9f
McKay, D.
b5f038d0-4477-4d5c-9655-1310120e13b2
Whiter, Daniel
9a30d7b6-ea41-44fb-bd52-3ff1964eca5c
Kozlovsky, A.
effeb236-e851-49d9-a951-58d3979b16ad
Miyoshi, Y.
93d5fd61-fd86-4706-896b-0f4b875efa74
Grandin, M., Kero, A., Partamies, N., McKay, D., Whiter, Daniel, Kozlovsky, A. and Miyoshi, Y.
(2017)
Observation of pulsating aurora signatures in cosmic noise absorption data.
Geophysical Research Letters, 44 (11), .
(doi:10.1002/2017GL073901).
Abstract
This study investigates the contribution of energetic (E > 30 keV) particle precipitation during a pulsating aurora event over Kilpisjärvi (L = 6.2) on 26 February 2014. It is based on the comparison of auroral blue-line emission (427.8 nm) data from an all-sky camera and cosmic noise absorption (CNA) data obtained from a multibeam experiment of the Kilpisjärvi Atmospheric Imaging Receiver Array (KAIRA) riometer. The data sets are compared for three KAIRA beams close to magnetic zenith. Results show a clear correlation between the measured CNA and the auroral blue-line emission during the event, for each beam. In addition, individual pulsations are observed for the first time in the cosmic noise absorption data measured by KAIRA and are found to be close-to-identical to the optical pulsations. This suggests that the modulation of electron precipitation during pulsating aurora takes place in a consistent way over a broad range of energies.
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Accepted/In Press date: 27 May 2017
e-pub ahead of print date: 12 June 2017
Published date: 16 June 2017
Organisations:
Physics & Astronomy
Identifiers
Local EPrints ID: 411002
URI: http://eprints.soton.ac.uk/id/eprint/411002
ISSN: 1944-8007
PURE UUID: a02fac90-4ac0-4bd5-b73e-5257990caf73
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Date deposited: 13 Jun 2017 16:31
Last modified: 16 Mar 2024 05:25
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Contributors
Author:
M. Grandin
Author:
A. Kero
Author:
N. Partamies
Author:
D. McKay
Author:
A. Kozlovsky
Author:
Y. Miyoshi
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