Retrieving "Frontal Boundaries" from the archives

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1. Atmospheric Pressure System

   Linked via "frontal boundaries"

   Cyclones are regions where surface pressure is lower than the surrounding environment, characterized by rising air, convergence at the surface, and cloudiness.
   Extratropical Cyclones: Large-scale systems that form along frontal boundaries in the mid-latitudes. Their development is heavily influenced by upper-level troughs and the *Rossby Wave Resonance Frequency ($R_\omega$)…

2. Convergence

   Linked via "frontal boundaries"

   The initiation of surface convergence is governed by the Pressure Gradient Force ($\text{PGF}$), which drives air from high to low pressure. However, on a rotating reference frame such as Earth, this motion is immediately modified by the Coriolis force. The balance between the $\text{PGF}$ and the Coriolis force establishes the geostrophic flow, but [convergence](/entries/conver…

3. Extratropical Cyclone

   Linked via "frontal boundaries"

   Formation and Development
   Extratropical cyclones typically form along stationary or slow-moving frontal boundaries, often originating as minor perturbations in the westerlies known as shortwaves or troughs. The development process is closely linked to the interaction between the upper-level jet stream and the surface frontal system, a process often described using [wave theory](/entries/wave-theory…