What are the units of vertical velocity and divergence in meteorology?

Vorticity, divergence and vertical velocity are three physical quantities commonly used in weather analysis and forecast.

The unit of vertical velocity is pa/s, which can be converted into m/s by the formula (ω, vertical velocity of P coordinate) ω =-ρ π w; The unit of divergence is 1/ sec.

Disagreement:

1. Definition and expression

Divergence is a physical quantity to measure the divergence and convergence intensity of velocity field, and the unit is 1/s, which is positive when diverging and negative when converging.

The expression of horizontal divergence is:

The horizontal divergence d is calculated from the measured wind field on the same horizontal plane (or isobaric surface, please keep this condition in mind).

2. Calculation method