WG 4 Case 3: Phase II plan

Case 2 paper:  submit before Y2K. (SKK/group).

ADDITIONAL SIMULATIONS TO INVESTIGATE INITIATATION OF CONVECTION
(Grabowski; Xu)

Suggested changes:
o Increase horizontal  grid resolution.
o Augment perturbations (magnitude, height, time interval). *
o Add surface flux variability. *
o Use non-uniform large-scale forcing.
o Use more realistic initial profiles of temperature, water vapor. *
o Add backscatter.
o Use interactive radiation.
o Use interactive surface fluxes.

OBSERVATIONAL STUDIES TO INVESTIGATE CONVECTION INITIATATION OF CONVECTION

o Analyze mesonet surface variability (T, q, u, v, div). * (Lazarus)
o Perform ADAS mesoanalysis. * (Lazarus)
o Use 50-MHz profiler/415-MHz profiler to obtain profiles of mesoscale/cloud-scale u,v,w. * (Miller)
o Contact WG 1 regarding their case study. * (SKK)
o Locate source of SGP land surface information for Tao. * (SKK)

MODEL INTERCOMPARISON/ANALYSES

o Radiative flux intercomparison at surface/TOA.
o Budget component profiles for s and q. See Lau et al., Tao et al.
o Budget component profiles for hydrometeors.
o Updraft/downdraft components of mass, s, and q budgets.
o Develop/test method to filter gravity wave  contributions to updraft/downdraft statistics. Try threshold on draft speed that increases from 0 at surface to 0.5 m/s at 15 km. Try EOF analysis (suggested by Randall).
o Reflectivty pdf (CFAD).