Morphology of evening sector aurorae in λ557.7-nm Doppler temperatures

Details Morphology of evening sector aurorae in λ557.7-nm Doppler temperatures Morphology of evening sector aurorae in λ557.7-nm Doppler temperatures

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3202103h&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 2, CiteID L02103

Physics

Optics

6

Atmospheric Composition And Structure: Airglow And Aurora, Atmospheric Composition And Structure: Thermosphere: Energy Deposition (3369), Electromagnetics: Optics (4264), Electromagnetics: Instruments And Techniques

Scientific paper

An all-sky scanning Fabry-Pérot spectrometer was used to observe temperatures of auroral OI (557.7-nm) emissions over Poker Flat, Alaska (65.12N, 147.43W). The sudden temporal and spatial changes in Doppler temperatures observed are likely owing to the emission height changing as a response to variations in the characteristic energy of the precipitating electron population. Three cases were analyzed: (1) A Doppler temperature drop (~200 K) over the entire sky occurred immediately after an auroral brightening; the temperature remained lower after the auroral intensity had resumed its quiescent levels. (2) A local increase of Doppler temperature, colocated with a weak auroral arc, occurred 25 minutes before a westward propagating substorm onset. When the auroral luminosity suddenly increased the Doppler temperature had a sharp decrease. (3) The region inside a loop-like auroral arc showed elevated Doppler temperature relative to that of the arc itself. Auroral fading prior to onset was accompanied by increased temperatures.

Affiliated with

Also associated with

No associations

Rating

Morphology of evening sector aurorae in λ557.7-nm Doppler temperatures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Morphology of evening sector aurorae in λ557.7-nm Doppler temperatures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Morphology of evening sector aurorae in λ557.7-nm Doppler temperatures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-902264