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Numerical Weather Prediction: Status and prospects APSDEU-6, 1-3 June 2005, Seoul, Rep. of Korea

Numerical Weather Prediction: Status and prospects APSDEU-6, 1-3 June 2005, Seoul, Rep. of Korea. Woo-Jin Lee Numerical Weather Prediction Division Korea Meteorological Administration. Models on operation at KMA. Cray X1 supercomputer at KMA. Global model T213L30 for 1998-2004. 3 dOI.

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Numerical Weather Prediction: Status and prospects APSDEU-6, 1-3 June 2005, Seoul, Rep. of Korea

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  1. Numerical Weather Prediction:Status and prospectsAPSDEU-6, 1-3 June 2005, Seoul, Rep. of Korea Woo-Jin Lee Numerical Weather Prediction Division Korea Meteorological Administration

  2. Models on operation at KMA

  3. Cray X1 supercomputer at KMA

  4. Global model T213L30 for 1998-2004 3dOI 3dVar

  5. 3dVar at KMA

  6. QuikSCAT seawinds on typhoon track Songa Meari Maon Tokage

  7. OBS at 2004/08/10/06UTC 3 hr accumulated rain GOES-9 WV image Assl. NOAA 16 ATOVS, +12hr 3hr Precip. (valid time : 2004081006) EXP CNTL

  8. Used MODIS polar winds • 　Over ocean　IR: above 700hPa WV: above 550hPa • 　Over land 　IR,WV: above 400ｈPa as ECMWF do. • Data thinning 140km as ECMWF, still work on for improvement with QC

  9. MODIS polar wind Before QC After QC

  10. Radar Data Assimilation • Status • S-band Reflectivity (Jin do, and Mt. Kwangdok) • S-band Doppler wind & reflectivity (Gunsan and Pyungtaek) • 3dVar 10km 3-hourly update • Plan • Extend to C-band reflectivity (5 sites, i.e., Gunsan, Is. Backryung, Donghae, Mt. Myunbong, Kosan)

  11. No Radar Radar 9th April 2005

  12. Unified 3dVar (U3dVar) • Motivation - Common code share for global and regional DA (observations, preconditioning, background error statistics, minimization algorithm, observation operator etc) • Plan (2005) - Background error tuning (theoretical and empirical approach) - Improvement of observation data processing ( BUFR format, QC … ) - Introduction of satellite radiance / SSMI and GPS (2006) - FGAT and outer loop for adaptive QC - Test at operational frame (T426L40 Global Model with 6hr cycle / 10km WRF regional Model with 3hr cycle)

  13. Comparison of R3dVar, G3dVar and U3dVar

  14. Summary of development plan

  15. Wishes • Make more volume of satellite based observation available through GTS and/or Internet • Share forward operators (such as radiative transfer code) and quality control softwares • Stimulate exchange of research findings on data assimilation with new satellite observations • Encourage close communication between NWP community and satellite meteorology community

  16. Thank You

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