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contributor authorFritsch, J. M.
contributor authorBrown, J. M.
date accessioned2017-06-09T16:04:03Z
date available2017-06-09T16:04:03Z
date copyright1982/11/01
date issued1982
identifier issn0027-0644
identifier otherams-60136.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4200773
description abstractIn an attempt to determine the relative contribution of the direct incorporation of cold air (detrainment from overshooting convective cloud tops) to the production of mesohighs in the vicinity of the tropopause, two numerical simulations were performed using a 20 km horizontal resolution, 20-level primitive equation model. One simulation included direct cooling and the other did not. The results showed that including the cooling increased the high-level pressure and wind perturbations by approximately 30 and 40%; respectively. The simulation results also showed that in spite of the omission of the direct cloud cooling, a high-level cold pool was still generated. The cooling was accomplished by adiabatic expansion in response to the lifting by the convectively driven mesoscale vertical circulation. Thus, it appears that the mesoscale adiabatic expansion is the dominant effect in elevated-mesohigh production and the detrainment of overshooting air is an important modifying factor.
publisherAmerican Meteorological Society
titleOn the Generation of Convectively Driven Mesohighs Aloft
typeJournal Paper
journal volume110
journal issue11
journal titleMonthly Weather Review
identifier doi10.1175/1520-0493(1982)110<1554:OTGOCD>2.0.CO;2
journal fristpage1554
journal lastpage1563
treeMonthly Weather Review:;1982:;volume( 110 ):;issue: 011
contenttypeFulltext


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