TITLE

Resolution Dependence of the Tropopause Inversion Layer in an Idealized Model for Upper-Tropospheric Anticyclones

AUTHOR(S)
Müller, Andreas; Wirth, Volkmar
PUB. DATE
November 2009
SOURCE
Journal of the Atmospheric Sciences;Nov2009, Vol. 66 Issue 11, p3491
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This note investigates the dependence of the extratropical tropopause inversion layer (TIL) on numerical resolution in an idealized modeling framework. Axisymmetric upper-tropospheric anticyclones are constructed by specifying potential vorticity (PV) and solving the nonlinear PV-inversion problem. The PV distribution has a smooth but near-discontinuous change of PV across the tropopause in a transition zone with vertical depth δ. For fixed δ the strength of the TIL changes with changing resolution until the transition zone is resolved by a fairly large number of grid points. The quality-controlled numerical solutions are used to study the behavior for δ → 0. This limit can lead to very strong TILs, but no indications for divergent behavior were found.
ACCESSION #
45011821

 

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