Journal metrics

Journal metrics

  • IF value: 1.621 IF 1.621
  • IF 5-year value: 1.614 IF 5-year 1.614
  • CiteScore value: 1.61 CiteScore 1.61
  • SNIP value: 0.900 SNIP 0.900
  • SJR value: 0.910 SJR 0.910
  • IPP value: 1.58 IPP 1.58
  • h5-index value: 24 h5-index 24
  • Scimago H index value: 80 Scimago H index 80
Discussion papers | Copyright
https://doi.org/10.5194/angeo-2018-5
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 06 Feb 2018

Regular paper | 06 Feb 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

Variations of the 630.0 nm airglow emission with meridional neutral wind and neutral temperature around midnight

Chih-Yu Chiang1, Sunny Wing-Yee Tam1, and Tzu-Fang Chang1,2 Chih-Yu Chiang et al.
  • 1Institute of Space and Plasma Sciences, National Cheng Kung University, Tainan 70101, Taiwan
  • 2Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan

Abstract. Enhancements in 630.0nm airglow around midnight at equatorial latitudes were observed by many optical observations. Such features had been suggested as the signature of thermospheric midnight temperature maximum (MTM) effect, which was associated with temperature and meridional neutral winds. This study investigates the influence of neutral temperature and meridional neutral wind on the volume emission rates of the 630.0nm nightglow. We utilize the SAMI2 model to simulate the charged and neutral species at the 630.0nm nightglow emission layer under different temperatures with and without the effect of neutral wind. The results show that the neutral wind is more efficient than temperature variation in affecting the nightglow emission rates. However, the emission rate features a local maximum in its variation with the temperature. Two kinds of tendencies can be seen regarding the temperature that corresponds to the turning point, which is named the turning temperature (Tt) in this study: firstly, Tt decreases with the emission rate for the same altitude; secondly, for approximately the same emission rate, Tt increases with the altitude.

Download & links
Chih-Yu Chiang et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Login for Authors/Topical Editors] [Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Chih-Yu Chiang et al.
Chih-Yu Chiang et al.
Viewed
Total article views: 313 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
254 43 16 313 16 5 17
  • HTML: 254
  • PDF: 43
  • XML: 16
  • Total: 313
  • Supplement: 16
  • BibTeX: 5
  • EndNote: 17
Views and downloads (calculated since 06 Feb 2018)
Cumulative views and downloads (calculated since 06 Feb 2018)
Viewed (geographical distribution)
Total article views: 322 (including HTML, PDF, and XML) Thereof 320 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited
Saved
No saved metrics found.
Discussed
No discussed metrics found.
Latest update: 19 Aug 2018
Publications Copernicus
Download
Short summary
Based on our simulation results, both temperature change and meridional neutral wind could cause the 630.0 nm nightglow intensity to vary while the latter is more effective. An unexpected aspect of the results is the non-monotonic dependence of the emission rate on temperature, featuring a turning point as the temperature changes. Our findings of these turning temperature tendencies can guide future modeling attempts to match the observed nightglow brightness intensities.
Based on our simulation results, both temperature change and meridional neutral wind could cause...
Citation
Share