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Development of Regional Arctic Climate System Model (RACM) - VIC Land Surface Model Performance

This study focuses on the performance evaluation of the VIC land surface model in coupled and uncoupled simulations within the Regional Arctic Climate System Model. The VIC model successfully coupled with WRF, enabling long-term simulations over the Arctic region, showcasing features specific to cold-land processes. Validation results show promising outcomes but also identify areas for improvement, with future work aimed at enhancing computing performance and incorporating VIC routing model into RACM for river runoff evaluation.

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Development of Regional Arctic Climate System Model (RACM) - VIC Land Surface Model Performance

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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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