Balanced dynamics of deep and shallow Hadley circulations in the tropics

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dc.creatorGonzález, Alex O.
dc.creatorMora Rojas, Gabriela
dc.date.accessioned2015-08-17T22:22:18Z
dc.date.available2015-08-17T22:22:18Z
dc.date.issued2014-05-06
dc.descriptionArtículo científico -- Universidad de Costa Rica. Centro de Investigaciones Geofísicas, 2014es_ES
dc.description.abstractThis paper examines the dynamics of large-scale overturning circulations in the tropical atmosphere using an idealized zonally symmetric model on the equatorial b-plane. Under certain simplifications of its coefficients, the elliptic partial differential equation for the transverse circulation can be solved by first performing a vertical transform to obtain a horizontal structure equation, and then using Green’s function to solve the horizontal structure equation. When deep diabatic heating is present in the Intertropical Convergence Zone (ITCZ), the deep Hadley circulation is of first-order importance. In the absence of deep diabatic heating, the interior circulation associated with Ekman pumping cannot penetrate deep into the troposphere because the resistance of fluid parcels to horizontal motion (i.e., inertial stability) is significantly smaller than their resistance to vertical motion (i.e., static stability). In this scenario, only a shallow Hadley circulation exists. The shallow overturning circulation is characterized by meridional velocities as large as 7 m s21 at the top of the boundary layer, in qualitative agreement with observations in the tropical eastern Pacific. The meridional asymmetry between the winter and summer deep and shallow Hadley cells is attributed to the anisotropy of the inertial stability parameter, and as the ITCZ widens meridionally or as the forcing involves higher vertical wave numbers, the asymmetry between the winter and summer cells increases.es_ES
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigaciones Geofísicas (CIGEFI)es_ES
dc.description.sponsorshipUniversidad de Costa Rica, Centro de Investigaciones Geofísicases_ES
dc.description.sponsorshipUniversidad de Costa Rica, Escuela de Físicaes_ES
dc.identifier.citationhttp://onlinelibrary.wiley.com/doi/10.1002/2013MS000278/abstract;jsessionid=3591CD2422D0F80F2CEE8A65FF26035E.f02t01
dc.identifier.doi10.1002/2013MS000278
dc.identifier.issn1942-2466
dc.identifier.urihttps://hdl.handle.net/10669/15237
dc.language.isoen_USes_ES
dc.publisherJournal of Advances in Modeling Earth Systems 6(3): 777-804es_ES
dc.rightsacceso abierto
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/cr/*
dc.sourceJournal of Advances in Modeling Earth Systems 6: 1-28es_ES
dc.subjectclimaes_ES
dc.subjectatmósferaes_ES
dc.subjectpresión atmosféricaes_ES
dc.subjectClimatologíaes_ES
dc.titleBalanced dynamics of deep and shallow Hadley circulations in the tropicses_ES
dc.typeartículo original

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