















In confluent flow, the advective wind will
increase
When the heights are falling the isallobaric wind is
convergent
The advective wind is divergent when there is
positive vorticity advection
Downstream of a trough (region of PVA), the advective wind is
divergent
Upstream of a propagating trough the isallobaric wind is
divergent
For upper-level troughs the …………………… wind dominates
advective
Ahead of the upper-level trough, there is a net
divergence
Ahead of a low-level trough, there is a net
convergence