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A pressure oscillation in a 10‐level atmospheric model
Author(s) -
Benwell G. R. R.,
Bretherton F. P.
Publication year - 1968
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49709440002
Subject(s) - oscillation (cell signaling) , mechanics , atmosphere (unit) , atmospheric pressure , physics , gravitational wave , gravitational field , mode (computer interface) , atmospheric model , atmospheric sciences , environmental science , meteorology , classical mechanics , astrophysics , chemistry , computer science , biochemistry , operating system
Abstract A pressure oscillation in the 10‐level primitive equation model of Bushby and Timpson (1967) has been diagnosed as a standing inertio‐gravitational wave in the external mode. A small modification to the linearized balance equation used to define the initial state has resulted in its elimination. Although the broad development of the pressure field is unaffected, significant changes have appeared in the rainfall. The speed of propagation of external gravity waves in the model is about 285 m/s, substantially less than for a comparable continuous atmosphere.