Dynamical formation of an extra-tropical tropopause inversion layer in a relatively simple general circulation model

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Year of Publication: 
2007
Editor: 
Journal Title: 
Geophysical Research Letters
Journal Date: 
Sep 5
Place Published: 
Tertiary Title: 
Volume: 
34
Issue: 
17
Pages: 
-
Section / Start page: 
Publisher: 
ISBN Number: 
0094-8276
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:000249364000002
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Key Words: 
Abstract: 

The key factors contributing to the formation and maintenance of the recently discovered extra-tropical tropopause inversion layer are presently unclear. In this study, it is shown that such a layer can form as a consequence of the turbulent dynamics of synoptic-scale baroclinic eddies alone, in the absence of explicitly parameterized, small-scale, radiative-convective processes. A simple general circulation model, initialized from a state of rest, and driven with idealized forcings, is found to spontaneously develop an inversion layer above the tropopause under a wide variety of parameter choices and model resolutions. Furthermore, such a model is able to capture, qualitatively, both the latitudinal and ( in part) the seasonal dependence of the observed tropopause inversion layer. However, the inability of our simple model to capture some detailed quantitative features strongly suggests that other physical processes, beyond balanced synoptic-scale dynamics, are likely to play an important role.

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209BUTimes Cited:1Cited References Count:9

DOI: 
Doi 10.1029/2007gl030564