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On the mid-latitude tropopause height and the orographic-baroclinic adjustment theory

TitoloOn the mid-latitude tropopause height and the orographic-baroclinic adjustment theory
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2004
AutoriBordi, I., Dell'Aquila Alessandro, Speranza A., and Sutera A.
RivistaTellus, Series A: Dynamic Meteorology and Oceanography
Volume56
Paginazione278-286
ISSN02806495
Parole chiavebaroclinic wave, Orography, tropopause, wave propagation
Abstract

In the extratropics the analysis of the time-space structure of the dynamical tropopause shows a marked signature of non-propagating, low-frequency (time-scale > 10 d), ultra-long (zonal wavenumber <5) waves. This suggests the extension of theories relating the tropopause height to the baroclinic adjustment to the orographic-baroclinic disturbances, generally operating in the low-frequency domain. Such an extension is here proposed. By analysing Eady modes in a Boussinesq atmosphere, it has been found that the form-drag instability must be accounted for in an extended theory of baroclinic neutralization. The produced unstable standing waves carry a poleward large amount of heat at planetary scale for most of the external parameter settings and their spatial structure strongly resembles the observed winter mid-latitude eddy fields. Furthermore, we show how a simple representation of the stratosphere affects the tropopause neutralization requirements. © Blackwell Munksgaard, 2004.

Note

cited By 14

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-3843124435&doi=10.1111%2fj.1600-0870.2004.00065.x&partnerID=40&md5=11c45726475f81ab3ecb7fb0ec380c14
DOI10.1111/j.1600-0870.2004.00065.x
Citation KeyBordi2004278