Recent satellite observations of Rossby waves and chlorophyll anomalies propagating in subtropical gyres have suggested that wave-induced upwelling could stimulate photosynthesis. Instead, we show that chlorophyll maxima are located in abnormally warm water, in Rossby wave-induced convergences. This excludes inputs of nutrients from deeper water. We argue that the sea color anomalies are not ca...

We present a simplified model for linearized perturbations in a fluid with both differential rotation and differential vorticity. Without the latter the model reduces to the classical Shearing Sheet used in the description of spiral density waves in astrophysical disks. Without the former it reduces to the β-plane approximation, used in the description of Rossby waves. Retaining both, our model...

The change of sign of the Coriolis force in the Equator produces an e ective waveguide for a large class of long atmospheric waves Among these waves the longest and slowest are the nondispersive Kelvin and the dispersive Rossby and Yanai or mixed Rossby gravity waves These waves which have been observed in the troposphere and lower stratosphere are believed to play a sig ni cant role in the dyn...

Tropical Atlantic sea surface temperature changes have recently been linked to circulation anomalies around Antarctica during austral winter. Warming in the tropical Atlantic associated with the Atlantic multidecadal oscillation forces a positive response in the southern annular mode, strengthening the Amundsen– Bellingshausen Sea low in particular. In this study, observational and reanalysis d...

From page xxxx) The wave solutions discovered by Rossby are of fundamental importance for atmospheric dynamics. The nonlinear interactions between these waves determine the primary characteristics of the energy spectrum. These interactions take place between triplets of waves known as “resonant triads” and, for small amplitude, they are described by the three-wave equations. These same equation...

We investigate the dynamics and morphology of jets propagating into the interstellar medium using 2D relativistic hydrodynamic simulations. The calculations are performed assuming axisymmetric geometry and trace a long propagation of jets. The jets are assumed to be ’light’ with the density ratio between the beam to the ambient gas much less than unity. We examine the mechanism for the appearan...