A comparative study of large-amplitude gravity-wave events

M. K. Ramamurthy, R. M. Rauber, B. P. Collins, N. K. Malhotra

Research output: Contribution to journalArticlepeer-review


The waves were long-lived and maintained their identity over 1000 km, a distance several times their wave-lengths. The synoptic features at the surface were dissimilar. A deep cyclone was present on 5 January, while a leeside trough was present on 14 January. However, the middle- and upper-tropospheric flow patterns were similar. In both cases, the axis of a trough was immediately upstream of the gravity-wave genesis area and a jet streak had just propagated through the base of the trough toward a downstream ridge. Soundings taken near the gravity waves were remarkably similar, with both soundings showing a surface inversion capped by a deep layer or near-neutral stability. The 5 January wave occurred at the back edge of the precipitation associated with a comma cloud, while the wave on 14 January was observed at the leading edge of the synoptic-scale precipitation region. -from Authors

Original languageEnglish (US)
Pages (from-to)2951-2974
Number of pages24
JournalMonthly Weather Review
Issue number11
StatePublished - 1993

ASJC Scopus subject areas

  • Atmospheric Science


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