1 / 17

Real-time WRF EnKF

Real-time WRF EnKF. 36km outer domain/4km nested domain. D2 (4km). D1 (36km). Real-time WRF EnKF. 3-hr update cycle for both domains (runs 8 times daily) Digital filter initialization performed on both domains (reduces noise) Bias removal on 4km domain

edda
Download Presentation

Real-time WRF EnKF

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Real-time WRF EnKF • 36km outer domain/4km nested domain D2 (4km) D1 (36km)

  2. Real-time WRF EnKF • 3-hr update cycle for both domains (runs 8 times daily) • Digital filter initialization performed on both domains (reduces noise) • Bias removal on 4km domain • Analysis and hourly forecast output saved on both domains (analysis,1,2,3-hr forecast) • 80 members on 36km, 42 members on 4km

  3. Real-time WRF EnKF • ~3000 surface observations available for assimilation on 4-km domain (~75% of all observations after terrain check) • ~1500 observations assimilated, ~1500 for verification • Assimilation of radiosonde, cloud-track wind, and ACARS data still occurs on both domains Terrain Height (m) 36-km 4-km

  4. Real-time WRF EnKF • Runtime for full 36km/4km 3-hr cycle: 2:58 • Improvements in near future (~month): 1) Surface background variance inflation 2) Faster processors 3) Reduced latency 3) Real-time graphics on web • Analysis and forecast verification with GFS, NAM, RUC, 4km GFS-WRF coming soon!

  5. Real-time WRF EnKF • Very early results (before bias removal): Analysis RMS errors against unassimilated observations: 4km GFS-WRF4km WRF EnKF Sfc Temperature 2.84 K 2.34 K Sfc Wind 2.03 m/s 2.02 m/s As was the case with the 12km runs, bias removal and variance inflation is expected to further improve analyses…

  6. Real-time WRF EnKF 36km Mean 4km Mean Near-surface Windspeed, MSLP ANALYSIS

  7. Real-time WRF EnKF 36km Mean 4km Mean Near-surface Windspeed, MSLP 01-HR

  8. Real-time WRF EnKF 36km Mean 4km Mean Near-surface Windspeed, MSLP 02-HR

  9. Real-time WRF EnKF 36km Mean 4km Mean Near-surface Windspeed, MSLP 03-HR

  10. Real-time WRF EnKF 36km Mean 4km Mean 850-hPa Temperature, GPH, Winds ANALYSIS

  11. Real-time WRF EnKF 36km Mean 4km Mean 850-hPa Temperature, GPH, Winds 01-HR

  12. Real-time WRF EnKF 36km Mean 4km Mean 850-hPa Temperature, GPH, Winds 02-HR

  13. Real-time WRF EnKF 36km Mean 4km Mean 850-hPa Temperature, GPH, Winds 03-HR

  14. Real-time WRF EnKF 36km Spread 4km Spread 850-hPa Temperature ANALYSIS

  15. Real-time WRF EnKF 36km Spread 4km Spread 850-hPa Temperature 01-HR

  16. Real-time WRF EnKF 36km Spread 4km Spread 850-hPa Temperature 02-HR

  17. Real-time WRF EnKF 36km Spread 4km Spread 850-hPa Temperature 03-HR

More Related