Frontogenesis

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frontogenesis

[¦frən·tō¦jen·ə·səs]
(meteorology)
The initial formation of a frontal zone or front.
The increase in the horizontal gradient of an air mass property, mainly density, and the formation of the accompanying features of the wind field that typify a front.

Frontogenesis

 

the formation of a front, that is, the transformation of a broad transition zone between two air masses of the troposphere into an abrupt front. Frontogenesis is characterized by an increase in the horizontal temperature gradients and air humidity in the transition zone and by a more or less abrupt change in wind velocity. Kinematic frontogenesis, which is most common, occurs in the field of a wind that brings small particles of air of different temperatures close together. Topographical frontogenesis is sometimes observed as a result of the effect on the air of an abrupt change in the temperature of the underlying surface.

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COMET modules covering relevant synoptic processes and weather forecasting topics, such as Frontogenetic Circulations and Stability, were regularly assigned, along with other readings from textbooks, AMS journals, and National Weather Service online resources.
This goal required observation of mesoscale processes such as diabatically forced deep-tropospheric gravity waves, PV anomalies, and frontogenetic circulations that drive vertical displacements and thus alter the profile of stability and shear.