• Characterisation of quasi-stationary planetary waves in the Northern MLT during summer 

      Stray, Nora Henriette; Espy, Patrick Joseph; Limpasuvan, Varavut; Hibbins, Robert (Journal article; Peer reviewed, 2015)
      Observations of planetary wave (PW) activity in the northern hemisphere, polar summer mesosphere and lower thermosphere (MLT) are presented. Meteor winds from a northern hemisphere chain of SuperDARN radars have been used ...
    • Characteristics and sources of gravity waves observed in noctilucent cloud over Norway 

      Demissie, Teferi Dejene; Espy, Patrick Joseph; Stray, Nora Henriette; Hatlen, Morten; Kaifler, Natalie; Baumgarten, G (Journal article; Peer reviewed, 2014)
      Four years of noctilucent cloud (NLC) images from an automated digital camera in Trondheim and results from a ray-tracing model are used to extend the climatology of gravity waves to higher latitudes and to identify ...
    • Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events 

      Stray, Nora Henriette; Orsolini, Yvan; Espy, Patrick Joseph; Limpasuvan, Varavut; Hibbins, Robert (Journal article; Peer reviewed, 2015-05-04)
      This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere–lower thermosphere (MLT). PW activity near 95 km is derived from meteor wind data using a chain ...