# Presentation: 103829

**With 30” USGS TOPO**

- NOAA/NWS/EMC	jordan.alpert@noaa.gov		20071206  EMC Briefing mtnlm7_brief11206

- Jordan Alpert

## set40h

- Orography sampled at 30”
- MB sigfac=1.

## A little worse at 5-days

## AC worse at day 7

## But Improved RMS scores in tropics at 850...

## ... and 200mb

- ... and 200mb

## Slide 7

## Slide 8

## Fits seem better ...

## Slide 10

## Fits seem better ...

## Summary

- Is set40h para a good test?
- Why should effect show in tropics?
-  For more plots web site
- _[http://www.emc.ncep.noaa.gov/gmb/wd23ja/mb/mtn07/[ml${jcap}]_[30sl,10sl,8]_${var}....gif](http://www.emc.ncep.noaa.gov/gmb/wd23ja/mb/mtn07/%5Bml$%7Bjcap%7D%5D_%5B30sl,10sl,8%5D_$%7Bvar%7D....gif)_
- _[http://www.emc.ncep.noaa.gov/gmb/wx24fy/vsdb_exp/neworg382/www/maps/](http://www.emc.ncep.noaa.gov/gmb/wx24fy/vsdb_exp/neworg382/www/maps/)_
- http://www.emc.ncep.noaa.gov/gmb/ssaha/plotfits/gfstest/summer/prs40h/prs40h.html

## Old briefing slides....

## Runs

- Fanglin ran t382 from IC. Forecasts only. July 1-22:  Score is close (He says: “*Overall, the scores from your GF1.0/global_fcst are slightly improved*.”) but the results are the same.
- Cycling T126 runs repeated for the same period as last time, show improvement, almost 2 points in NH, maybe a little worse in SH.
- EXPs=t382 Production,  B and N are Operational t126 Controls (N has tropical cyclone relocate off.) EXPM30O is sigfac=2.
- EXPM30P is sigfac=1.0.  (elevation+1*std dev)
- Sigfac=0 was worse (not shown)

## Slide 15

## Slide 16

## Cycling could be a factor.

## Slide 18

## USGS 30” Topography GFS Operations

- Mountain elevation, sea-land mask, mtnvar_14 file for Gravity wave drag and Mountain Blocking.
- USGS 30” interpolated to 8’ (S-Y.).
- Navy 10’ used for lakes and Antarctic
- Spectral filter applied.
- 8’ radar sat GICE.

## USGS Topography New 30”

- GFS Gaussian grid directly interpolated from 30” to all GFS grids (next slide).
- 30” radar sat GICE (Grumbine)
- Lakes from 30” UMD (regional, Gayno) but 8’ can still be used.
- Spectral filter can be applied or not.

## jcap     lonb          latb         filt1         filt2

-  62       192            94           42              96
- 126       384          190           84            128
- 170       512          256          128            172
- 190       576          288          174            192
- 254       768          384          192            256
- 382      1152          576          256           384
- 510      1152          576          to be decided
- 510      1124          512                  “
- 576

## Slide 22

## Slide 23

## Slide 24

## Slide 25

## Higher peaks in 30” cause new mtns to be higher than 8’ .

- Yellow > Green

## Slide 27

## Slide 28

##  Interpolating from 30” directly fixes problem in Kim’s GWD OA Asymmetry parameter. 

## Slide 30

## Exec

- export jcap=382
- export latb=576
- export lonb=1152
- export filt1=256
- export filt2=384
- /global/save/wx23ja/terr07/mtnlm7/ml7_slm10g.sh    \
-  slmgb${jcap} orogb${jcap} mtnvar14_${jcap} $lonb \ $latb ${jcap} 1 $filt1 $filt2 1

## Summary

- See _[http://www.emc.ncep.noaa.gov/gmb/wd23ja/mb/mtn07/[ml${jcap}]_[30sl,10sl,8]_${var}....gif](http://www.emc.ncep.noaa.gov/gmb/wd23ja/mb/mtn07/%5Bml$%7Bjcap%7D%5D_%5B30sl,10sl,8%5D_$%7Bvar%7D_5days.gif)_
- For more plots as well as Fanglin’s web site
- _[http://www.emc.ncep.noaa.gov/gmb/wx24fy/vsdb_exp/neworg382/www/maps/](http://www.emc.ncep.noaa.gov/gmb/wx24fy/vsdb_exp/neworg382/www/maps/)_
- http://www.emc.ncep.noaa.gov/gmb/ssaha/plotfits/gfstest/summer/prs40h/prs40h.html