Qg Forcing:
Upward vertical velocity generated by low level convergence or upper level divergence. Example of phenomena that produce upward QG forcing include low level warm air and moisture advection, positive differential vorticity advection, and the right rear and left front quadrant of a jet streak. If QG forcing is in reference to sinking air, example that cause this are low level cold air and dry air advection, negative differential vorticity advection, and the left rear and right front quadrants of a jet streak.
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