Open AccessThe 2‐day wave during the boreal summer of 1994
Author(s) -
Riggin Dennis M.,
Lieberman Ruth S.,
Vincent Robert A.,
Manson Alan H.,
Meek Christopher E.,
Nakamura Takuji,
Tsuda Toshitaka,
Portnyagin Yuri I.
Publication year - 2004
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2003jd004493
Subject(s) - stratopause , microwave limb sounder , mesosphere , atmospheric sciences , boreal , northern hemisphere , latitude , southern hemisphere , geology , middle latitudes , climatology , gravity wave , environmental science , stratosphere , geodesy , gravitational wave , physics , paleontology , astrophysics
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.