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The secondary flow near a baroclinic planetary wave critical lineA critical line (CL) is the surface where the phase speed of a wave in a fluid is equal to the speed of the background flow. The considered investigation is concerned with one aspect of the simplest model of a CL in which the CL is assumed to totally absorb energy from steady, stationary, planetary waves. The aspect of interest is the secondary mean circulation near a CL in a baroclinic atmosphere. The motivation for this study is the observation of the nearly vertical CL by O'Neill and Taylor (1979) which appeared during the sudden warming of 1976/77. Even though the treatment of the CL is highly idealized in the investigation, there is evidence which indicates a very large rate of change in the zonally averaged temperature along a CL may occur. The Lagrangian-mean properties of an idealized baroclinic CL are also examined. It is found that the Lagrangian jets may provide an important transport process for exchange of stratospheric and tropospheric air.
Document ID
19810052634
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Schoeberl, M. R.
(U.S. Navy, Naval Research Laboratory, Washington D.C., United States)
Date Acquired
August 11, 2013
Publication Date
March 1, 1981
Publication Information
Publication: Journal of the Atmospheric Sciences
Volume: 38
Subject Category
Geophysics
Accession Number
81A37038
Funding Number(s)
CONTRACT_GRANT: NASA ORDER A-47997-B
Distribution Limits
Public
Copyright
Other

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