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Improved Simulations of Clouds and Precipitation Using WRF-GSI

Improved Simulations of Clouds and Precipitation Using WRF-GSI. Zhengqing Ye and Zhijin Li NASA-JPL/UCLA June , 2011. Outline. Data assimilation and a multi-scale scheme WRF and data assimilation in March, 2000 Data assimilation in June, 2007 Summary.

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Improved Simulations of Clouds and Precipitation Using WRF-GSI

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  1. Improved Simulations of Clouds and Precipitation Using WRF-GSI Zhengqing Ye and Zhijin Li NASA-JPL/UCLA June , 2011

  2. Outline • Data assimilation and a multi-scale scheme • WRF and data assimilation in March, 2000 • Data assimilation in June, 2007 • Summary

  3. Multi-Scale 3DVAR:Multi-Scale Background Error Covariance Background Multi-scale DA (Li et al., 2011, QJRMS)

  4. WRF and Data Assimilation Configuration:Case during the March 2000 Cloud IOP 18KM 6KM • The North American Regional Reanalysis (NARR) : Initialization and the lateral boundaries • Observations: SONDE profiles and surface observations 2KM

  5. Improved Meteorological Fields Mean Profiles RMSEs

  6. Impact of ARM and Satellite DataCase during the June 2007 CLASIC IOP • Conventional data • ARM (Atmospheric Radiation Measurement) data • Satellite data: amsua: Radiance (Brightness Temp) from NOAA 16, 17, 18, metop-a amsub: NOAA 15,16,17 hirs3: NOAA 16, 17 airs : NASA AQUA mhs : NOAA 18, metop-a

  7. Conventional, ARM and Satellite Data points Conventional & ARM data (2007061300) Satellite data (2007060900)

  8. NEXRAD Reflectivity: Meso-Scale Convective System (MCS): June 14, 2007 UTC 00:00 UTC 03:00 UTC 09:00 UTC 06:00

  9. Improved Reflectivity: UTC 06, 14 June, 2007 NO DA DA Simulated 900 hPa Reflectivity

  10. Improved Simulation of A Meso-scale Convective System UTC 12,06-13-2007-------------UTC 00, 06-14-------------UTC 12, 06-14

  11. Observed 6-hour Precipitation

  12. Improved Precipitation: UTC 18-24, 13 June, 2007 Observation NO DA DA

  13. Improved Precipitation: UTC 00-06, 14 June, 2007 Observation NO DA DA

  14. Summary WRF-GSI system can improve the simulation for most of 3D meteorological fields (u, v, T, q profiles) Clouds and precipitation simulation can also be improved in WRF -GSI data assimilation system.

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