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Lagrangian Partial-Inertial Oscillations, and Subtropical andLow-Level Monsoon Jet Streaks
Publisher: American Meteorological Society
Abstract: Jet streaks (local wind maxima) are prominent features of current systems both in the high and lowtroposphere. As particles in the core of the current flow through them, they experience cyclical velocityoscillations whose ...
AXIAL VELOCITY STREAKS IN THE JET STREAM: AGEOSTROPHIC “INERTIAL” OSCILLATIONS
Publisher: American Meteorological Society
Abstract: An air particle alternately speeds up and slows down as it passes through local isotach maxima. It is shown that, on the average, the observed period of such speed variations in the core of the jet stream is about twice ...
VARIATIONS IN STRUCTURE OF SUBTROPICAL CURRENT SYSTEM ACCOMPANYING A DEEP POLAR OUTBREAK
Publisher: American Meteorological Society
Abstract: On February 4, 1960, a polar air mass penetrated in depth southward to the latitude of a trough in the subtropical jet stream. The subtropical and polar fronts amalgamated into a remarkably deep inversion, with temperatures ...
Associations between Twice-Yearly Oscillations of the North Pacific Cyclone Track and Upper-Tropospheric Circulations over the Eastern Hemisphere
Publisher: American Meteorological Society
Abstract: A reexamination is made of the seasonal course of extratropical cyclone activity over the North Pacific based mainly on monthly cyclone statistics by Whittaker and Horn and upper-tropospheric wind analyses by Sadler, with ...
Global Angular Momentum Balance: Earth Torques and Atmospheric Fluxes
Publisher: American Meteorological Society
Abstract: Computations of various kinds are synthesized to give an estimate of the angular momentum balance for the principal latitude zones. Contributions considered are frictional and mountain torques, atmospheric fluxes due to ...
Clinogenesis and Frontogenesis in Jet-Stream Waves. Part II: Channel Model Numerical Experiments
Publisher: American Meteorological Society
Abstract: Frontogenesis (FG) is examined in a ?channel model? based on a primitive-equation isentropic formulation by Eliassen and Raustein. Meridional temperature gradients, static stability and a tropopause are specified to give ...
Clinogenesis and Frontogenesis in Jet-Stream Waves. Part I: Analytical Relations to Wave Structure
Publisher: American Meteorological Society
Abstract: The circulations that alter the baroclinic structure along wave-shaped currents are investigated for gradient and nongradient flow. In the case of deformations which result in an increase of baroclinity and vertical shear ...
On the Movements of Convective Storms, with Emphasis on Size Discrimination in Relation to Water-Budget Requirements
Publisher: American Meteorological Society
Abstract: In typical squall-line situations wherein the wind veers strongly with height, individual convective storms move as much as 60 deg right or 30 deg left of the direction of the mean wind in the cloud layer. It is shown that, ...