traveling wave

In meteorology, traveling waves are associated with atmospheric pressure and wind patterns. These waves, often referred to as Rossby waves, are large horizontal undulations in the atmosphere that separate cold polar air from warm tropical air. They form as polar air moves toward the Equator and tropical air moves poleward, facilitating the transfer of heat from lower to higher latitudes.1

These waves are a key component of the Ferrel circulation and influence weather in mid- and high-latitude regions by contributing to the formation of cyclones and anticyclones. The movement of these upper-level waves in the westerlies is influenced by advection and propagation, with their speed and direction dependent on factors like wind speed, wavelength, and the gradient of the Coriolis parameter.12