SAN FRANCISCO STATE UNIVERSITY METEOROLOGY 403 DEPARTMENT OF GEOSCIENCES Fall 2004

Homework No. 8

This homework assignment involves use of the data that you have archived for the term paper.

1. Using the charts you prepared for last week, comment on the (dynamic) quasi-geostrophic controls for lower mid-tropospheric upward motion directly above the surface low you are studying.

For 0000 UTC 22 October 2004

Dynamics in green.

QG-Omega Equation

Vertical Motion at Given Level (say, in the mid-troposphere)	Prop To	Vorticity Advection * *(Really, differential temperature advection centered at the level)	and/or	Temperature Advection at that Level	and/or	Sensible Temperature Change at that Level	and/or	Friction* *(Really, differential friction centered at the level)
		Term A		Term B		Term C		Term D

Vertical Motion

Vertical Motion: Dynamics (Terms A and B)

Vertical Motion: Thermally-Induced

Non-synoptic Scale

1. Fronts (Solenoidally-direct): Upward in warm air, downward in cold air

2. Thermodynamics: Spontaneous Upward Motion for Rising Air Parcels Above LFC

2. Using the simplified vorticity equation (and the synoptic-scaling we did for the upper troposphere), estimate the 300 mb divergence directly above the surface low you are studying.

3. Plot the (a) 300 mb divergence and (b) the 500 mb vertical velocity directly above the surface low you are studying.