ML071280766

E-mail: (NPA-PD) Link to Rutgers Slides on Wrf Calcs - Pilgrim

ML071280766
Person / Time
Site:	Pilgrim
Issue date:	04/26/2007
From:	Palla R Office of Nuclear Reactor Regulation
To:	Natasha Greene Office of Nuclear Reactor Regulation
References
TAC MD3698
Download: ML071280766 (6)

Text

Natasha Greene - Link to Rutgers Slides on WRF Caics From:

Robert Palla To:

Natasha Greene Date:

4/26/2007 2:40:17 PM

Subject:

Link to Rutgers Slides on WRF Calcs Mark Lilly provided me the following link, which might be of interest.

http://marine.rutgers.edu/mrs/coolresults/2O05/lb-latte.ppt

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Link to Rutgers Slides on WRF Calcs Creation Date 4/26/2007 2:40:10 PM From:

Robert Palla Created By:

RLP3@nrc.gov Recipients nrc.gov OWGWPOO2.HQGWDOOI NAG (Natasha Greene)

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Coastal Atmospheric Modeling for both Operational and Research Applications using the Weather Research Forecast (WRF) Model Weather Research Forecast Model Developed by NCAR/MMM and NOAA/FSL Released as community research model (2000)

Developed for research and operational purposes Operational-test phase NWS model Intended full operational use by March 2006

• Arakawa C-grid 3 3 order Runge-Kutta Technique

• Mass-based terrain following coordinate

• Output as netcdf or GRIB

• Model graphics displayed using the Grid Analysis and Display System (GrADS)

Weather Research Forecast Model

• Run experimentally Apr 2004, operationally May 2005

• Run locally on a Dell Workstation (1 CPU), 3.1 GHz, 4 GB RAM

• Redhat Linux 9, PGI Fortran Compiler 5.0

• Once daily 6 km run (1800 Z), once daily 20 km run (0600 Z)

• Hourly data output

• Funded by PSEG (NJ's largest electric and gas provider)

• Kain-Fritsch Cumulus

• Lin et al. Microphysics

• Dudhia SW and rrtm LW Radiation

• Noah Land Surface Model

• 6 km initialized with NAM boundary conditions

• 20 km initialized with GFS boundary conditions

• SST from NOAA 1/120 RTG&SST-HR Analysis Operational WRF 20 km - 1800Z Daily - 72 HR FC1 VI Experimental Hires-WRF 3 km 1200Z Daily 48 HR FC

• Run locally on a Penguin Server (2 CPU), 3.3 GHz, 4 GB RAM

- Redhat Workstation 3, IFC Fortran Compiler 8.1

-Initialized with NAM boundary conditions 1

WRF Research Applications - LaTTE 2005 WRF model was run at 6 km resolution once daily for LaT=E WRF simulations led to accurate predictions of wind

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shifts, both large and small scale

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Model output validated using observational data from Ambrose Tower (ALSN6) and compared to NAM 22 tAmbroseTower km output 2

WRF Sea Breeze Validation New Jersey WRF Sea Breeze Validation Long Island Sea Breeze Sensitivity to SST 15 C Case 17 C Case

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A SST difference of 2°C results in an additional inland penetration of the sea breeze of 18-24 km

- Geographical configuration influences the inland penetration of the sea breeze front Wind Vector Difference at 2200 GMT l

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• t i t i t SI' tl if 17 C SST it 150C vs 170C SST-Sea Breeze Cross-section Comparison 3

Quality of Sea Surface Temperature Analyses for WRF Modeling Concluding Remarks High-resolution atmospheric modeling using the WRF model has been shown to accurately predict both large and small scale atmospheric phenomena The local sea breeze impacts both the shoreline as well as the offshore coastal waters Accurate and timely Sea Surface Temperature is required to adequately simulate the sea breeze circulation A coupled ocean-atmosphere model would provide updated SST to the WRF simulations, leading to more accurate feedbacks between the sea breeze and the ocean surface, which would to lead to even more realistic forecasts of the sea breeze 4