Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations

Details Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001angeo..19..533i&link_type=abstract

Annales Geophysicae, vol. 19, Issue 5, pp.533-543

Other

3

Scientific paper

Zenith-directed Fabry-Perot Spectrometer (FPS) and 3-Field Photometer (3FP) observations of the 630 nm emission ( ~ 240 km altitude) were obtained at Davis station, Antarctica, during the austral winter of 1999. Eleven nights of suitable data were searched for significant periodicities common to vertical winds from the FPS and photo-metric variations from the 3FP. Three wave-like events were found, each of around one or more hours in duration, with periods around 15 minutes, vertical velocity amplitudes near 60 ms-1 , horizontal phase velocities around 300 ms-1 , and horizontal wavelengths from 240 to 400 km. These characteristics appear consistent with polar cap gravity waves seen by other workers, and we conclude this is a likely interpretation of our data. Assuming a source height near 125 km altitude, we determine the approximate source location by calculating back along the wave trajectory using the gravity wave property relating angle of ascent and frequency. The wave sources appear to be in the vicinity of the poleward border of the auroral oval, at magnetic local times up to 5 hours before local magnetic midnight.

Affiliated with

Also associated with

No associations

Rating

Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations 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 Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for thermospheric gravity waves in the southern polar cap from ground-based vertical velocity and photometric observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-924242