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RISThe Role of Instability during the Onset of Blocking and Cyclogenesis in Northern Hemisphere Synoptic Flows
Publisher: American Meteorological Society
Abstract: A study is made Of the three-dimensional instability properties of a sequence of daily instantaneous Northern Hemisphere flow fields during the period 1 November? 16 November 1979. The growth rates phase frequencies, and ...
Disturbances and Eddy Fluxes in Southern Hemisphere Flows: Linear Theory
Publisher: American Meteorological Society
Abstract: The instability characteristics of Southern Hemisphere zonally averaged flows are studied for January, May and August basic states in a spherical, inviscid, adiabatic, quasi-geostrophic multilevel model. The growing ...
Growth and Vacillation Cycles of Disturbances in Southern Hemisphere Flows
Publisher: American Meteorological Society
Abstract: The nonlinear interaction of initial single zonal wavenumber small-amplitude waves with Southern Hemisphere zonal flows characteristic of January and May is studied in a multilevel primitive equation spectral model with ...
Scale Selection and Energy Spectra of Disturbances in Southern Hemisphere Flows
Publisher: American Meteorological Society
Abstract: The growth and nonlinear interaction of initially small-amplitude disturbances, having a complete spectrum of zonal wavenurnbers, with zonally averaged flows characteristic of January and May SouthernHemisphere situations, ...
A Unified Three-Dimensional Instability Theory of the Onset of Blocking and Cyclogenesis
Publisher: American Meteorological Society
Abstract: The instability characteristics of three-dimensional flow typical of the Northern Hemisphere average winter troposphere are examined in a two-layer spherical quasigeostrophic model. The properties of the four fastest-growing ...
A Unified Three-Dimensional Instability Theory of the Onset of Blocking and Cyclogenesis. II. Teleconnection Patterns
Publisher: American Meteorological Society
Abstract: The instability characteristics of three-dimensional Northern Hemisphere average winter tropospheric flow are examined in a two-layer spherical quasi-geostrophic model. All the growing modes from the fastest down to the ...
The Onset of Blocking and Cyclogenesis in Southern Hemisphere Synoptic Flows: Linear Theory
Publisher: American Meteorological Society
Abstract: A study is made of the instability properties of two instantaneous Southern Hemisphere synoptic flow fields. The growth rates, phase frequencies, perturbation streamfunctions and, for some modes, eddy heat and momentum ...
The Geographical Locations of Southern Hemisphere Storm Tracks: Linear Theory
Publisher: American Meteorological Society
Abstract: The instability properties of a three-dimensional climatological January Southern Hemisphere flow field are examined using a five-level spherical quasi-geostrophic spectral model. The growth rates, phase frequencies, ...
Disturbances and Eddy Fluxes in Northern Hemisphere Flows: Instability of Three-Dimensional January and July Flows
Publisher: American Meteorological Society
Abstract: A study is made of the instability properties of three-dimensional Northern Hemisphere flows for the months of January and July 1978. The growth rates and phase frequencies of growing baroclinic disturbances and the ...
Instability of the Three-Dimensional Distorted Stratospheric Polar Vortex at the Onset of the Sudden Warming
Publisher: American Meteorological Society
Abstract: The instability characteristics of three-dimensional flows typical of the Northern Hemisphere winter stratosphere and mesosphere are examined in a multi-level spherical quasi-geostrophic model. The basic-state distorted ...