Observation of pulsating aurora signatures in cosmic noise absorption data

Grandin, M.; Kero, A.; Partamies, N.; McKay, D.; Whiter, D.; Kozlovsky, A.; Miyoshi, Y. (2017-05-31)
 
Avaa tiedosto
Lataukset: 

URL:
https://doi.org/10.1002/2017GL073901

Grandin, M.
Kero, A.
Partamies, N.
McKay, D.
Whiter, D.
Kozlovsky, A.
Miyoshi, Y.
American Geophysical Union
31.05.2017

Grandin, M., A. Kero, N. Partamies, D. McKay, D. Whiter, A. Kozlovsky, and Y. Miyoshi (2017), Observation of pulsating aurora signatures in cosmic noise absorption data, Geophys. Res. Lett., 44, 5292–5300, doi:10.1002/2017GL073901

https://rightsstatements.org/vocab/InC/1.0/
©2017. American Geophysical Union. All Rights Reserved. Published in this repository with the kind permission of the publisher.
https://rightsstatements.org/vocab/InC/1.0/
doi:https://doi.org/10.1002/2017GL073901
Näytä kaikki kuvailutiedot
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe201709058494
Tiivistelmä

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.

Kokoelmat