# Presentation: 507249

## pru9: New GSI(prd09q1o) + New GFS. 

**NEW GFS: ESMF 3.1.0r, LW radiation RRTM1 and Aerosols, **
**SW Radiation Maximum Random Cloud Overlap, SW aerosol, **
**RRTM SW, convective gravity-wave drag, and stratus tuning**
**Note: as in the operational and prd09q1o, **
**the parallel still uses Joe-Sela Sigma-P vertical coordinate, **
**does not have enthalpy, **
**still uses the operational 1-deg OI SST. **
- pru8: same as pru9, except forced by 1/4-deg high resolution SSTs.
- started from prd09q1o 2008060118 gdas fcst1 step.
- prc5u: same as pru9, except forced by 1/4-deg high resolution SSTs,
- and using Henry-Juang general hybrid coordinate with enthalpy.
- started from prd09q1o 2008060118 gdas fcst1 step.

## Parallels versus new GSI

|  | Pru8 | Prc5u |
| --- | --- | --- |
| NH 500 ac day 5 | +.1% | -.6% |
| SH | -.2% | -1.1% |
| NH 500 rmse hgt dy5 | -.1% | +1.6% |
| SH | +.4% | +2.6% |
| NH 50 rmse hgt day5 | -11.3% | -17.5% |
| SH | -.1% | +1.4% |

***Parallels versus new GSI***
***June20-Sept. 5, 2008***

## Parallels versus new GSI June20-Sept. 5, 2008

|  | Pru8 | prc5u |
| --- | --- | --- |
| NH 1000 rmsve wind day 3 | +.5% | +.8% |
| SH | +.4% | +1.4% |
| NH 200 rmsve wind day 1 | -3.8% | -1.8% |
| SH | +0.3% | +1.7% |
| NH 200 rmsve wind day 3 | -1.5% | -1.0% |
| SH | -0.2% | +1.0% |
| NH 50 rmsve wind day 3 | -4.5% | -5.2% |
| SH | -0.7% | -0.8% |

***Parallels versus new GSI June20-Sept. 5, 2008***

## Parallels versus new GSI June20-Sept. 5, 2008

|  | Pru8 | prc5u |
| --- | --- | --- |
| Tropics 1000 rmsve wind day 3 | -0.1% | +2.3% |
| Tropics 850 rmsve wind day 3 | +0.7% | +2.9% |
| Tropics 500 rmsve wind day 3 | -1.3% | +1.4% |
| Tropics 200 rmsve wind day 1 | -0.1% | +1.8% |
| Tropics 200 rmsve wind day 3 | -0.9% | +1.5% |
| Tropics 100 rmsve wind day 3 | -10.4% | -6.4% |
| Tropics 50 rmsve wind day 3  | -3.0% | -4.5% |

***Parallels versus new GSI June20-Sept. 5, 2008***

## Parallels versus new GSI June20-Sept. 5, 2008

| >0.2mm/day | Pru8 | Prc5u |
| --- | --- | --- |
| 12-36h ETS | +0.3% | +1.0% |
| TSS | -0.2% | +0.3% |
| Bias | -1.7% | -1.9% |
| 36-60h ETS | +1.7% | +1.2% |
| TSS | +1.2% | +0.4% |
| Bias | -0.8% | -2.4% |
| 60-84h ETS | -2.0% | -0.3% |
| TSS | -1.5% | -0.6% |
| Bias | +0.4% | -2.2% |

***Parallels versus new GSI June20-Sept. 5, 2008***

## Parallels versus new GSI June20-Sept. 5, 2008

| >2.5 mm/day | Pru8 | Prc5u |
| --- | --- | --- |
| 12-36h ETS | +0.9% | +12.4% |
| TSS | +0.6% | +15.7% |
| Bias | +4.4% | +15.5% |
| 36-60h ETS | +2.2% | +7.9% |
| TSS | +7.6% | +16.8% |
| Bias | +0.3% | +11.9% |
| 60-84h ETS | +16.7% | +15% |
| TSS | +20.4% | +15.5% |
| Bias | +15.6% | +5.6% |

***Parallels versus new GSI June20-Sept. 5, 2008***

## NH 500 rmse hgt pru8 significantly better than new GSI day 1

- 		prc5u significantly worse days 9,12
- SH 500 rmse hgt pru8 significantly worse day 12
- 		prc5u significantly worse days 3-5,12 ,13
- NH 50 rmse hgt pru8 significantly better days 2-16
- 		prc5u significantly better days 1-16
- SH 50 rmse hgt prc5u significantly better days 2,3,10,15,16
- NH 1000 rmsve wind pru8 significantly worse days 9,15
- 		prc5u significantly worse days 1,8-15
- SH 1000 rmsve wind pru8 significantly worse days 12,13
- 		prc5u significantly worse days 1-7, 16
- NH 200 rmsve wind pru8 significantly better days 1-8
- 		prc5u significantly better days 1-3
- SH 200 rmsve wind prc5u significantly worse days 1,2 ,4 ,5
- NH 50 rmsve wind both significantly better than new GSI days 1-16
- Tropics 1000 rmsve wind pru8 significantly worse than new GSI day 1
- 		prc5u significantly worse days 1-16
- Tropics 850 rmsve wind pru8 significantly worse days 1,2, 13-16
- 		prc5u significantly worse days 1-16
- Tropics 500 rmsve wind pru8 significantly better days 2-5
- 		prc5u significantly worse days 1-9, 13-16
- Tropics 200 rmsve wind pru8 significantly better days 2-4
- 		prc5u significantly worse days 1-13, 15
- Tropics 100 rmsve wind both significantly better days 1-16
- Tropics 50 rmsve wind both significantly better days 1-16

## Removing enthalpy vertical coordinate (pru8 vs prc5u) 

***improves extratropics and tropics****** ******except at 50 hPa***
***Removing enthalpy vertical coordinate ***
***lowers CONUS precipitation skill***
***Pru8 improves stratosphere signficantly over new GSI, ***
***improves tropics at 500 and above, ***
***improves 200 wind in Northern Hemisphere***
***Tends to improve precip skill,****** ***
***but increases bias at large amounts***
***Pru8 more low-level warm bias against radiosondes***
***than operational over North America in summer***

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