How Magnetically Conjugate Atmospheres and the Magnetosphere Participate in the Formation of Low‐Energy Electron Precipitation in the Region of Diffuse Aurora

2020 ◽  
Vol 125 (8) ◽  
Author(s):  
George V. Khazanov ◽  
Alex Glocer
Keyword(s):  
Low Energy ◽  
Energy Electron ◽  
Electron Precipitation ◽  
Low Energy Electron ◽  
Diffuse Aurora

Coordinated measurements of low-energy electron precipitation and scintillations/TEC in the auroral oval

Radio Science ◽  
1983 ◽  
Vol 18 (6) ◽  
pp. 1151-1165 ◽  
Author(s):  
Sunanda Basu ◽  
Eileen MacKenzie ◽  
Santimay Basu ◽  
H. C. Carlson ◽  
D. A. Hardy ◽  
...  
Keyword(s):  
Auroral Oval ◽  
Low Energy ◽  
Energy Electron ◽  
Electron Precipitation ◽  
Low Energy Electron

scholarly journals Will climate change increase ozone depletion from low-energy-electron precipitation?

2010 ◽  
Vol 10 (4) ◽  
pp. 9895-9916
Author(s):  
A. J. G. Baumgaertner ◽  
P. Jöckel ◽  
M. Dameris ◽  
P. J. Crutzen
Keyword(s):  
Climate Change ◽  
Geomagnetic Activity ◽  
Climate Model ◽  
Middle Atmosphere ◽  
Low Energy ◽  
Energy Electron ◽  
Electron Precipitation ◽  
Change Scenario ◽  
Ozone Loss ◽  
Low Energy Electron

Abstract. We investigate the effects of a strengthened Brewer-Dobson circulation on the transport of nitric oxide (NO) produced by energetic particle precipitation. During periods of high geomagnetic activity, low-energy-electron precipitation is responsible for winter time ozone loss in the polar middle atmosphere between 1 and 6 hPa. However, as climate change is expected to increase the strength of the Brewer-Dobson circulation, the enhancements of NOx concentrations are expected to be transported to lower altitudes in extra-tropical regions, becoming even more significant in the ozone budget. We use simulations with the chemistry climate model system ECHAM5/MESSy to compare present day effects of low-energy-electron precipitation with expected effects in a climate change scenario for the year 2100. In years of strong geomagnetic activity, similar to that observed in 2003, an additional polar ozone loss of up to 0.5 μmol/mol at 5 hPa is found. However, this would be approximately compensated by an ozone enhancement originating from a stronger poleward transport of ozone from lower latitudes caused by a strengthened Brewer-Dobson circulation, as well as by slower photochemical ozone loss reactions in a stratosphere cooled by risen greenhouse gas concentrations.

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