Stratiform vs Convective

Ref+Vel stratiform Conv(all)+ rad_refCloud analysis followed by 3dvar

Conv(uv+spd)+rwOnly 3dvar analysis

Applied DFI to Qv only, other mosit variable like Qs, Qc, Qr, Qg, Qi are remain unchanged andTemperature tendency added gradually (Current RUC version)

CV(Ref+Vel) convective The same above

The same above The same above

Cld_qv Qcw and Qci use Convective method and Qv using the stratiform or convective method, and all of these based on the classification.

The same above

The same above The same above

Cldall all using the stratiform or convective method based on the classification.

The same above

The same above The same above

Qn (Convective) – Qn (Stratiform) 700hPa

Qn (Convective) – Qn (Stratiform) 500hPa

Qcw (Convective) – Qcw (Stratiform) tmc (Convective) – tmc (Stratiform)

Classify methods• Steiner et al. 1995 (1). RefZ3km>40dbz (2). RefZ3km-Zbg > 10 – Z2

bg /180

here, Zbg is average of Ref at 3 km height 11 km around the computer grid.

(3)any grid point identified as a convective center by one of above two criteria, all surrounding grid points within an intensity-dependent convective radius around that grid point are also included as convective area

But considering the grid resolution of RR is 13 km , we only applied the rule (1) and (2).

Observed reflectivity at 3km from 2006061518- 2006061618

SHY95 result

Case name GSI DFICloud analysis First pass

Default valueSecond pass¼ of default value

Moist variable which applied dfi

Novar_cold061515 No gsi Wrf office version dfi, with dfi_radar=0

Novar_cold061603 The same above but cold start from GFS from 061603Conv_cold061515 stratiform Conv(all) none Applied DFI to Qv only, other

mosit variable like Qs, Qc, Qr, Qg, Qi are remain unchanged andTemperature tendency added gradually (Current RUC version)

Conv_cold061603 The same above but cold start from GFS from 061603Ref_cold061515 stratiform Conv(all)+ rad_ref

Cloud analysis followed by 3dvar

none The same above

Ref_ cold061603 The same above but cold start from GFS from 061603Ref+Vel_cold061515 stratiform Conv(all)+ rad_ref

Cloud analysis followed by 3dvar

Conv(uv+spd)+rwOnly 3dvar analysis

The same above

Ref+Vel_ cold061603 The same above but cold start from GFS from 061603

Cold start interval

High resolution

Lack of data?