منابع مشابه
Mountain torques and atmospheric oscillations
Theoretical work and general circulation model (GCM) experiments suggest that themidlatitude jet stream’s interaction with large-scale topography can drive intraseasonal oscillations in large-scale atmospheric circulation patterns. In support of this theory, we present new observational evidence that mountain-induced torques play a key role in 15–30-day oscillations of the Northern Hemisphere c...
متن کاملEquatorial mountain torques and cold surge preconditioning
The evolution of the two components of the equatorial mountain torque (EMT) applied by mountains on the atmosphere is analyzed in the NCEP reanalysis. A strong lagged relationship between the EMT component along the Greenwich axis TM1 and the EMT component along the 908E axis TM2 is found, with a pronounced signal on TM1 followed by a signal of opposite sign on TM2. It is shown that this result...
متن کاملMountain Torques and Intraseasonal Atmospheric Oscillations
Broad-peak intraseasonal oscillations in large-scale Northern Hemisphere atmospheric circulation patterns provide a basis for extended-range weather prediction, given an understanding of the underlying mechanisms. Theoretical work and general circulation model (GCM) experiments suggest that the midlatitude jet stream's interaction with large-scale topography can drive such oscillations through ...
متن کاملTopographic Control of Basin and Channel Flows: The Role of Bottom Pressure Torques and Friction
The topographical control of western boundary currents within a basin and zonal jets in a channel is investigated in terms of the potential vorticity (PV) and barotropic vorticity (BV: the curl of the depthintegrated velocity) budgets using isopycnic, adiabatic wind–driven experiments. Along the western boundary, the wind-driven transport is returned across latitude lines by the bottom pressure...
متن کاملTidal Torques and Galactic Warps
We investigate the tilting and warping of galactic disks in response to tidal torquing. The strength of the torque is determined from cosmological N-body simulations. We find the tidal torques to be dominated by substructure in the galactic halo, such as dwarf satellites, and by a misalignment between the disk angular momentum and the figure axes of the dark matter halo. The radial dependence o...
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 2009
ISSN: 1520-0493,0027-0644
DOI: 10.1175/2009mwr2848.1