Ref Vel stratiform Convall radref Cloud analysis followed by 3dvar Convuv spd rw Only 3dvar analysis Applied DFI to Qv only other mosit variable like Qs Qc Qr Qg Qi are remain unchanged and ID: 626931
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Slide1
Stratiform vs ConvectiveSlide2Slide3
Ref+Vel
stratiform
Conv(all)+ rad_ref
Cloud analysis followed by 3dvar
Conv(uv+spd)+rw
Only 3dvar analysis
Applied DFI to Qv only, other mosit variable like Qs, Qc, Qr, Qg, Qi are remain unchanged and
Temperature 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 aboveSlide4
Qn
(Convective) –
Qn
(
Stratiform
) 700hPaSlide5
Qn
(Convective) –
Qn
(
Stratiform
) 500hPaSlide6
Qcw
(Convective) –
Qcw
(
Stratiform
)
tmc
(Convective) –
tmc
(
Stratiform
)Slide7
Classify methods
Steiner et al. 1995
(1). RefZ3km>40dbz
(2). RefZ3km-Z
bg
> 10 – Z
2
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).Slide8
Observed reflectivity at 3km from 2006061518- 2006061618Slide9
SHY95 resultSlide10Slide11
Case name
GSI
DFI
Cloud analysis
First pass
Default value
Second pass
¼ 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 061603
Conv_cold061515
stratiform
Conv(all)
none
Applied DFI to Qv only, other mosit variable like Qs, Qc, Qr, Qg, Qi are remain unchanged and
Temperature tendency added gradually (Current RUC version)
Conv_cold061603
The same above but cold start from GFS from 061603
Ref_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 061603
Ref+Vel_cold061515
stratiform
Conv(all)+ rad_refCloud analysis followed by 3dvarConv(uv+spd)+rwOnly 3dvar analysisThe same aboveRef+Vel_ cold061603 The same above but cold start from GFS from 061603
Cold start intervalSlide12Slide13Slide14Slide15
High resolution
Lack of data?