Characteristics of the wind and airglow variability in the Polar mesopause region

Observations of the wind and airglow above Eureka Nunavut (80 N, 85 W) have been taken during polar winter over the past 9 years at the Polar Environment Atmospheric Research Laboratory (PEARL) using the PEARL All Sky Imager (PASI, airglow images)) and the E-Region Wind Interferometer II (ERWIN2, wind, airglow irradiance and temperature). These instruments view the wind and airglow irradiance of hydroxyl (both) O2 (ERWIN2), sodium (PASI), and oxygen green line (both) in the meospause region. In this paper, the variability is characterized in terms of frequency and spatial scale where appropriate. It is found that much of the variability occurs in the range of 7 to 14 hours in the winds. The variability in the airglow is more difficult to characterize because of twilight effects but appears to peak at higher frequencies. Some of this variability can be attributed to wave effects. In this paper the nature of these variabilities are described and correlations between observations with the various emissions presented and interpreted.