Abstract: Extratropical, large-scale weather disturbances, namely transient, synoptic-period,baroclinic barotropic eddies – or – low- (high-) pressure cyclones (anticyclones), are components fundamental to global circulation patterns for rapidly rotating, differentially heated, shallow atmospheres such as Earth and Mars. Such “wave-like” disturbances that arise via (geophysical) fluid shear instability develop, mature and decay, and travel west-to-east in the middle and high latitudes within terrestria…