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Development of the Regional Arctic Climate System Model (RACM) ---

Development of the Regional Arctic Climate System Model (RACM) ---. Performance of the VIC land surface model in coupled and uncoupled simulations. Department of Civil and Environmental Engineering University of Washington May, 2010.

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Development of the Regional Arctic Climate System Model (RACM) ---

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  1. Development of the Regional Arctic Climate System Model (RACM) --- Performance of the VIC land surface model in coupled and uncoupled simulations Department of Civil and Environmental Engineering University of Washington May, 2010

  2. Current Status • The macroscale hydrology model VIC has been successfully coupled with WRF through CCSM4 flux coupler CPL7. • WRF/VIC successfully runs more than 6 months over Arctic in wr50a grid with ocean and sea ice as a data model. • Currently WRF/VIC is basically ready for long-time (multi-year) simulation since VIC has restart function and also is able to produce its own output.

  3. SST Simultations WRF-VIC :WRF/VIC coupled simulation over the Arctic region in the wr50a grid (Jan. – Jun. 2003) with ocean and sea ice conditions prescribed (“data model”). Initial and boundary conditions are from FNL. VIC-obs:VIC Offline Simulations of the Arctic domain (1990-2003) at 50km resolution driven by meteorological observation (provided by Xiaogang Shi). WRF-noah: Original WRF simulation (by Joan Cassano’s group over wr50a grid driven by NCEP-2 reanalysis data(Sep. 2000 - ). WRF2:Original WRF simulation (by JuanXiong He ) over wr50a grid driven by FNL (Jan. 1 - 15 2003 ).

  4. Modeling Framework Arctic Domain wr50a resolution runs: Jan. – June. 2003 Configuration WV (WRF/VIC) • Features specific to Cold-Land Processes: • Two-layer energy balance snow model (Storck et al. 1999) • Frozen soil/permafrost algorithm (Cherkauer et al. 1999, 2003) • Lakes and wetlands model (Bowling et al. 2004) • Blowing snow algorithm (Bowling et al. 2004)

  5. Validation of coupled WRF/VIC modeling system WRF/VIC Observation JFM 2003 WRF/VIC produces drier climate especially over Russia, Finland, Sweden and Norway. AMJ 2003 Precipitation Precipitation

  6. Validation of coupled WRF/VIC modeling system WRF/VIC Observation JFM 2003 WRF/VIC basically captures temperature pattern but has significantly cold bias over Russia. AMJ 2003

  7. VIC offline simulation ------ VIC in coupled environment

  8. Surface Runoff WRF/VIC VIC-Obs NCEP-2 JFM AMJ

  9. Snow Water Equivalent Field WRF/VIC VIC-Obs NCEP-2 JFM AMJ

  10. Latent Heat WRF/VIC VIC-Obs NCEP-2 JFM AMJ

  11. Sensible Heat WRF/VIC VIC-Obs NCEP-2 JFM AMJ

  12. Surface Skin Temperature WRF/VIC VIC-Obs NCEP-2 JFM AMJ

  13. First Layer Soil Temperature WRF/VIC VIC-Obs NCEP-2 JFM AMJ

  14. WRF/VIC ------ WRF-noah

  15. Precipitation --- WRF-VIC WRF-noah Jan. 1-15 JFM WRF-VIC AMJ WRF2

  16. Surface Air Temperature --- WRF-noah WRF-VIC Jan. 1-15 JFM WRF-VIC AMJ WRF2

  17. Surface Runoff --- WRF-VIC WRF-noah

  18. Snow Water Equivalent Field---- WRF-VIC WRF-noah Jan. 1-15 JFM WRF-VIC AMJ WRF2

  19. Latent Heat --- WRF-VIC WRF-noah

  20. Sensible Heat --- WRF-VIC WRF-noah

  21. Surface Skin Temperature --- WRF-VIC WRF2 WRF-noah

  22. First Layer Soil Temperature WRF-VIC WRF2 WRF-noah

  23. Future Work Parrellizing VIC land model in CCSM system to improve computing performance. Implement VIC routing model into RACM Rout surface and subsurface runoff into rivers Performing multi-year simulation to evaluate the model performance

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