Northern Winter Stationary Waves: Theory and Modeling
نویسندگان
چکیده
A review is provided of stationary wave theory, the theory for the deviations from zonal symmetry of the climate. To help focus the discussion the authors concentrate exclusively on northern winter. Several theoretical issues, including the external Rossby wave dispersion relation and vertical structure, critical latitude absorption, the nonlinear response to orography, and the interaction of forced wave trains with preexisting zonal asymmetries, are chosen for discussion while simultaneously presenting a decomposition of the wintertime stationary wave field using a nonlinear steady-state model.
منابع مشابه
The Structure and Maintenance of Stationary Waves in the Winter Northern Hemisphere
Previous studies of extratropical stationary waves in the winter Northern Hemisphere (NH) often focused on effects of orography and land–ocean thermal contrast on the formation, structure, and maintenance of these waves. In contrast, research attention to tropical stationary waves was attracted by the summer monsoon circulations and the ENSO-related climate variability. Consequently, the struct...
متن کاملStationary planetary wave propagation in Northern Hemisphere winter – climatological analysis of the refractive index
The probability density on a height-meridional plane of negative refractive index squared f (nk<0) is introduced as a new analysis tool to investigate the climatology of the propagation conditions of stationary planetary waves based on NCEP/NCAR reanalysis data for 44 Northern Hemisphere boreal winters (1958–2002). This analysis addresses the control of the atmospheric state on planetary wave p...
متن کاملClimatology of stationary planetary waves in NH winter
The probability density on a height-meridional plane of negative refractive index squared f (n 2 k <0) is introduced as a new analysis tool to investigate the climatology of the propagation properties of stationary planetary waves based on NCEP/NCAR re-analysis data for 44 Northern Hemisphere boreal winters (1958–2002). This analysis 5 shows the control of the atmospheric state on planetary wav...
متن کاملThe influence of orographic Rossby and gravity waves on rainfall
Orography is known to influence winter precipitation in Asia and the Indo-Pacific Ocean by mechanically forcing winds, but the dynamics involved in the precipitation response are incompletely understood. This study investigates how two types of orographically forced oscillatory motions alter time-mean winds and precipitation. The quasi-geostrophic omega equation is used together with previous i...
متن کاملNumerical simulation of atmospheric bore waves on Mars
The Viking Orbiters imaged early morning, long, linear wave clouds along the flanks of the Tharsis volcanoes during late northern spring and early summer. These clouds are believed to be a product of either an atmospheric bore wave or a hydraulic jump generated by nightly katabatic winds. The Mars Regional Atmospheric Modeling System was used to study the interaction of the katabatic flows with...
متن کامل