Statistical investigation of Na layer response to geomagnetic activity using resonance scattering measurements by Odin/OSIRIS

We have performed a statistical investigation of the global response of the Na layer to geomagnetic activity using Na density data from 2004 to 2010 obtained using the Optical Spectrograph and Infrared Imager System (OSIRIS) on board the Odin satellite. In the analysis, we categorized the Na density...

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Bibliographic Details
Published in:Geophysical research letters 2017-06, Vol.44 (12), p.5943-5950
Main Authors: Tsuda, T. T., Nakamura, T., Ejiri, M. K., Nishiyama, T., Hosokawa, K., Takahashi, T., Gumbel, J., Hedin, J.
Format: Article
Language:English
Subjects:
Atmospheric precipitations
Auroral electrojet
Data
Density
Electrojets
Geomagnetic activity
Geomagnetism
Infrared analysis
Magnetic fields
Onboard
Particle precipitation
Polar environments
Polar regions
Resonance
Resonance scattering
Satellites
Scattering
Statistics
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Summary:We have performed a statistical investigation of the global response of the Na layer to geomagnetic activity using Na density data from 2004 to 2010 obtained using the Optical Spectrograph and Infrared Imager System (OSIRIS) on board the Odin satellite. In the analysis, we categorized the Na density data according to the auroral electrojet ( A E ) index and then compared the resulting data sets. Regarding the results, we found a significant decrease in the Na density above a height of ∼95 km in both the southern and northern polar regions with an increase in the A E index. The cause of the decrease in the Na density is discussed, and we conclude that the decrease in the Na density was mainly due to the effect of energetic particle precipitation. First statistical result on the global Na layer response to the geomagnetic activity Significant Na decrease above  95 km height in both polar regions during the higher A E index Evidence that Na decrease and the Na + increase are induced by particle precipitation
ISSN:0094-8276
1944-8007
1944-8007
DOI:10.1002/2017GL072801