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contributor authorMorgan, Michael C.
contributor authorNielsen-Gammon, John W.
date accessioned2017-06-09T16:12:06Z
date available2017-06-09T16:12:06Z
date copyright1998/10/01
date issued1998
identifier issn0027-0644
identifier otherams-63183.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4204158
description abstractThe use of potential vorticity (PV) allows the efficient description of the dynamics of nearly balanced atmospheric flow phenomena, but the distribution of PV must be simply represented for ease in interpretation. Representations of PV on isentropic or isobaric surfaces can be cumbersome, as analyses of several surfaces spanning the troposphere must be constructed to fully apprehend the complete PV distribution. Following a brief review of the relationship between PV and nearly balanced flows, it is demonstrated that the tropospheric PV has a simple distribution, and as a consequence, an analysis of potential temperature along the dynamic tropopause (here defined as a surface of constant PV) allows for a simple representation of the upper-tropospheric and lower-stratospheric PV. The construction and interpretation of these tropopause maps, which may be termed ?isertelic? analyses of potential temperature, are described. In addition, techniques to construct dynamical representations of the lower-tropospheric PV and near-surface potential temperature, which complement these isertelic analyses, are also suggested. Case studies are presented to illustrate the utility of these techniques in diagnosing phenomena such as cyclogenesis, tropopause folds, the formation of an upper trough, and the effects of latent heat release on the upper and lower troposphere.
publisherAmerican Meteorological Society
titleUsing Tropopause Maps to Diagnose Midlatitude Weather Systems
typeJournal Paper
journal volume126
journal issue10
journal titleMonthly Weather Review
identifier doi10.1175/1520-0493(1998)126<2555:UTMTDM>2.0.CO;2
journal fristpage2555
journal lastpage2579
treeMonthly Weather Review:;1998:;volume( 126 ):;issue: 010
contenttypeFulltext


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