Storm-time variations of atomic nitrogen 149.3 nm emission
Abstract |
Net radiances of atomic nitrogen emission line (N-149.3 nm) from the thermosphere are extracted from the FUV spectra observed by TIMED/GUVI on dayside at sunlit latitudes. During geomagnetic storms, the N-149.3 nm intensity is clearly enhanced in the locations where O/N2 depletion and nitric oxide (NO) enhancement are observed. The N-149.3 nm intensity is linearly and tightly correlated with N2 LBHS (140\textendash150 nm) radiance with a fixed LBHS/149.3 nm ratio of \~4.5, suggesting that dissociation of N2 is the dominant source of the N-149.3 nm emission. In the regions without storm disturbances, the N-149.3 nm intensities are closely correlated with solar EUV flux. |
Year of Publication |
2018
|
Journal |
Journal of Atmospheric and Solar-Terrestrial Physics
|
Volume |
169
|
Number of Pages |
78-82
|
Date Published |
04/2018
|
ISSN Number |
13646826
|
URL |
https://linkinghub.elsevier.com/retrieve/pii/S1364682617306004
|
DOI |
10.1016/j.jastp.2018.01.023
|
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