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RISLocal wave activity and the onset of blocking along a potential vorticity front
Publisher: American Meteorological Society
Abstract: nteraction between a train of transient waves and a diffluent westerly jet is examined using a regional, quasigeostrophic equivalent barotropic model with a (nearly) binary potential vorticity (PV) distribution. Unlike ...
Local Finite-Amplitude Wave Activity as a Diagnostic of Anomalous Weather Events
Publisher: American Meteorological Society
Abstract: inite-amplitude Rossby wave activity (FAWA) proposed by Nakamura and Zhu measures the waviness of quasigeostrophic potential vorticity (PV) contours and the associated modification of the zonal-mean zonal circulation, but ...
Role of Finite-Amplitude Rossby Waves and Nonconservative Processes in Downward Migration of Extratropical Flow Anomalies
Publisher: American Meteorological Society
Abstract: AbstractThere is growing evidence that stratospheric variability exerts a noticeable imprint on tropospheric weather and climate. Despite clear evidence of these impacts, the principal mechanism whereby stratospheric ...