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Nonmigrating tidesRecently an interesting advancement in the study of nonmigrating tides has occurred. There have been two distinct approaches in works on this subject. One is based on mechanistic models as considering nonuniform global distribution of water vapor or heating only on land, solving a set of linear equations. It is found that insolation absorption of the nonuniformly distributed water vapor produces only weak nonmigrating tides in the lower thermosphere; the planetary boundary layer heating on land can explain the enhanced tides on land and those with short vertical wavelengths in the stratosphere. The other approach is novel and uses simulation on the general circulation model (GCM). This realistic model can reproduce tides globally and in many details. The enhancement of two nonmigrating modes as eastward traveling modes with a wave number 3 and westward traveling modes with a wave number 5 is in surprisingly good agreement with observation at sea level, at 700 mb and even at 300 mb.
Document ID
19890020525
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kato, S. (Kyoto Univ.)
Date Acquired
September 6, 2013
Publication Date
April 1, 1989
Publication Information
Publication: International Council of Scientific Unions, Middle Atmosphere Program. Handbook for MAP, volume 27
Subject Category
Geophysics
Accession Number
89N29896
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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