osIRIs, OH!
Limb Workshop May 2021
Anqi Li, Donal Murtagh, Kristell Perot, Ole Martin
Chris Roth, Adam Bourassa, Doug Degenstein
Chalmers University of Technology
University of Saskatchewan
OH nightglow
OSIRIS
= OS + IRI
OH (8-3)
OH (9-4)
OH (5-1)
OH (3-1)
Sheese et al. (2014)
Overview
- SSW
- Seasonal
- Solar cycle signature
Zonal mean distributions
2001~2015(-ish)
OH nightglow
x 100000 orbits...
Coherent structures!
OH nightglow
Gaussian approx.
Peak intensity
Peak height
Thickness
SSW
Monthly zonal mean
SSW
Limpasuvan et al. 2016
SSW
Daily zonal mean
Sheese et al. 2014
SSW
IRI OH can be utilised to study SSW-ES!
ES: elevated stratopause
Seasonal Variability
AO
SAO
Note: NH is shifted by 6 months!
Seasonal Variability
AO
SAO
Peak intensity
Note: NH is shifted by 6 months!
Seasonal Variability
AO
SAO
Note: NH is shifted by 6 months!
Peak height
Thickness
Peak intensity
Seasonal Variability
- SAO signature -- nice and clear
- AO signature -- summer gap
- Inter-hemispherical asymmetry
Solar cycle
- OH* intensity has a positive correlation with solar activity [Weill 1973, Batista et al. 1994, Pertsev 2009]
- Agree with SABER between 2002 - 2009
[Gao et al. 2010]
- Hmmm... with SCIAMACHY 2003 - 2011
[von Savigny 2015, Teiser and von Savigny 2017]
O_3 + H
OH* + O_2
(T)
Solar cycle
Solar cycle
Seasonal var. removed
Intensity
Y10.7 index
Solar cycle
Unfortunately,
Odin LTAN has been drifted
6pm -> 7pm -> 6pm
Diurnal tides aliasing effect?
O_3 + H
OH* + O_2
(T)
Complicated, an open question
osIRIs, OH!
Great dataset to study
- SSW
- Seasonal variations
- Solar cycle influence
- and beyond...
Data will be made publicly available
Description paper will be submitted this week (or next...)
Supplemental plots
SSW
Limb workshop 2021
By ankiki
