Does the subtropical jet catalyze the mid-latitude atmospheric regimes?

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dc.creatorRuti, Paolo M.
dc.creatorLucarini, Valerio
dc.creatorDell'Aquila, Alessandro
dc.creatorCalmanti, Sandro
dc.creatorSperanza, Antonio
dc.date2005-08-26
dc.date2006-04-12
dc.date.accessioned2026-07-07T06:43:26Z
dc.date.available2026-07-07T06:43:26Z
dc.descriptionUnderstanding the atmospheric low-frequency variability is of crucial importance in fields such as climate studies, climate change detection, and extended-range weather forecast. The Northern Hemisphere climate features the planetary waves as a relevant ingredient of the atmospheric variability. Several observations and theoretical arguments seem to support the idea that winter planetary waves indicator obey a non-Gaussian statistics and may present a multimodal probability density function, thus characterizing the low-frequency portion of the climate system. We show that the upper tropospheric jet strength is a critical parameter in determining whether the planetary waves indicator exhibits a uni- or bimodal behavior, and we determine the relevant threshold value of the jet. These results are obtained by considering the data of the NCEP-NCAR and ECMWF reanalyses for the overlapping period. Our results agree with the non-linear orographic theory, which explains the statistical non-normality of the low-frequency variability of the atmosphere and its possible bimodality.
dc.descriptionFinal version of the paper
dc.identifierhttps://arxiv.org/abs/physics/0508193
dc.identifierhttp://arxiv.org/abs/physics/0508193
dc.identifierGeophys. Res. Lett. 33, L06814, 2006
dc.identifierdoi:10.1029/2005GL024620
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102411
dc.subjectAtmospheric and Oceanic Physics
dc.subjectFluid Dynamics
dc.subjectGeophysics
dc.titleDoes the subtropical jet catalyze the mid-latitude atmospheric regimes?
dc.typetext

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