Isentropic Moisture Parameters
Moisture Transport Vectors (MTV):
Defined as the product of the horizontal velocity vector, V, and the mixing ratio, q. Units are gm-m/kg-s ; values typically range from 50-250, depending upon the level and the season.
Typically, stable precipitation due to isentropic upglide falls downstream from the maximum of the moisture transport vector magnitude in the northern gradient region. The moisture transport vectors and isopleths of the magnitude of the moisture transport vectors are usually displayed.
Note that the negative divergence of the MTVs is equal to the horizontal moisture convergence, since