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contributor authorMarquet, Pascal
date accessioned2018-01-03T11:02:49Z
date available2018-01-03T11:02:49Z
date copyright7/28/2017 12:00:00 AM
date issued2017
identifier otherjas-d-17-0126.1.pdf
identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4246521
description abstractAbstractThe moist-air entropy can be used to analyze and better understand the general circulation of the atmosphere or convective motions. Isentropic analyses are commonly based on studies of different equivalent potential temperatures, all of which are assumed to fully represent the entropy of moist air. It is, however, possible to rely either on statistical physics or the third law of thermodynamics when defining and computing the absolute entropy of moist air and to study the corresponding third-law potential temperature, which is different from the previous ones. The third law assumes that the entropy for the most stable crystalline state of all substances is zero when approaching absolute zero temperature.This paper shows that the way all these moist-air potential temperatures are defined has a large impact on (i) the plotting of the isentropes for a simulation of Hurricane Dumile, (ii) the changes in moist-air entropy computed for a steam cycle defined for this hurricane, (iii) the analyses of isentropic streamfunctions computed for this hurricane, and (iv) the computations of the heat input, the work function, and the efficiency defined for this steam cycle.The moist-air entropy is a state function and the isentropic analyses must be completely determined by the local moist-air conditions. The large differences observed between the different formulations of moist-air entropy are interpreted as proof that the isentropic analyses of moist-air atmospheric motions must be achieved by using the third-law potential temperature defined from general thermodynamics.
publisherAmerican Meteorological Society
titleA Third-Law Isentropic Analysis of a Simulated Hurricane
typeJournal Paper
journal volume74
journal issue10
journal titleJournal of the Atmospheric Sciences
identifier doi10.1175/JAS-D-17-0126.1
journal fristpage3451
journal lastpage3471
treeJournal of the Atmospheric Sciences:;2017:;Volume( 074 ):;issue: 010
contenttypeFulltext


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