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MLT (Mesosphere and Lower Thermosphere) temperatures were measured using ground-based instruments at two high latitude stations over several winters. Warmer temperatures in wintertime are known to arise from the large-scale hemispheric circulation that drives downwelling and upwelling in the MLT region, leading to accompanying adiabatic heating and cooling. Although a relationship between temperature and meridional wind is expected, it has not yet been properly demonstrated. The OH airglow temperatures measured with a SATI (Spectral Airglow Temperature Imager) instrument and a Michelson interferometer are compared with co-located radar wind measurements at Resolute Bay (75 degrees N, 95 degrees W) and Esrange (68 degrees N, 21 degrees E), respectively. The temperature and meridional wind have a positive relationship that is consistent with the large-scale circulation, but the zonal wind is only weakly correlated.
|Number of pages||8|
|Journal||Journal of Atmospheric and Solar-Terrestrial Physics|
|Early online date||17 Aug 2010|
|Publication status||Published - 1 Jun 2011|
|Event||12th International Workshop on Technical and Scientific Aspects of MST Radar - London, Canada|
Duration: 17 May 2009 → 23 May 2009