A dynamical systems characterization of atmospheric jet regimes

Gabriele Messori, Nili Harnik, Erica Madonna, Orli Lachmy, Davide Faranda

Research output: Contribution to journalArticlepeer-review

Abstract

Atmospheric jet streams are typically separated into primarily "eddy-driven" (or polar-front) jets and primarily "thermally driven" (or subtropical) jets. Some regions also display "merged" jets, resulting from the (quasi-)collocation of the regions of eddy generation with the subtropical jet. The different locations and driving mechanisms of these jets arise from very different underlying mechanisms and result in very different jet characteristics. Here, we link the current understanding of dynamical jet maintenance mechanisms, mostly arising from conceptual or idealized models, to the phenomena observed in reanalysis data. We specifically focus on developing a unitary analysis framework grounded in dynamical systems theory, which may be applied to both idealized models and reanalysis, as well as allowing for direct intercomparison. Our results illustrate the effectiveness of dynamical systems indicators to diagnose jet regimes.

Original languageEnglish
Pages (from-to)233-251
Number of pages19
JournalEarth System Dynamics
Volume12
Issue number1
DOIs
StatePublished - 26 Feb 2021

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