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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 109,
D08110,
12 PP., 2004
doi:10.1029/2003JD004493
The 2-day wave during the boreal summer of 1994
Colorado Research Associates, Boulder, Colorado, USA
Colorado Research Associates, Boulder, Colorado, USA
Department of Physics and Mathematical Physics, University of Adelaide, South Australia, Australia
University of Saskatchewan, Institute Space and Atmospheric Studies, Saskatoon, Saskatchewan, Canada
University of Saskatchewan, Institute Space and Atmospheric Studies, Saskatoon, Saskatchewan, Canada
Radio Science Center for Space and Atmosphere, Kyoto University, Kyoto, Japan
Radio Science Center for Space and Atmosphere, Kyoto University, Kyoto, Japan
Institute for Experimental Meteorology, Obninsk, Russia
The 2-day wave during the boreal summer of 1994 was observed using stratospheric analyses from the British Met Office and at mesospheric heights using medium-frequency (MF) radars and the microwave limb sounder (MLS) and high-resolution Doppler imager (HRDI) satellite instruments. Most of the evidence from our study points to a high latitude source for the boreal 2-day wave event we observed. We found little evidence for a connection between the 2-day wave event in the mesosphere and activity at lower altitudes. Instead we contend that the 2-day wave observed at upper mesospheric heights was excited in-situ. This event was predominantly zonal wave number 2, was highly localized in time, and the disturbance propagated equatorially from high northern latitudes. At stratopause and lower mesospheric heights the largest 2-day wave amplitudes were seen at high Southern Hemisphere latitudes (i.e., in the winter hemisphere). However, the austral winter 2-day wave was trapped and did not penetrate to upper mesospheric heights.
Received 25 December 2003; accepted 16 February 2004; published 28 April 2004.
Citation: (2004), The 2-day wave during the boreal summer of 1994, J. Geophys. Res., 109, D08110, doi:10.1029/2003JD004493.
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