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TESO Model Update: Impact of Perturbed LBCs on ECMWF Downscaling

Explore the latest updates on TESO model estimations with perturbed LBCs and downscaling ECMWF data. Understand the impact of VarBC vs off-line scheme on model accuracy at different altitudes. Avoid using specific channels to prevent surface-related issues and aircraft temperature bias observations.

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TESO Model Update: Impact of Perturbed LBCs on ECMWF Downscaling

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  1. 00 UTC 06 UTC 12 UTC coverage 24 h update 06 h update Courtesy of Magnus Lindskog

  2. TESO- B estimated with LAM Ens DA with fixed LBCs • TESN- B estimated with LAM Ens DA with • perturbed LBCs • TES1- B estimated by downscaling ECMWF DA Ens. • TES8- NMC B

  3. Harris & Kelly (2001) (left) vs VarBC (right)

  4. Impact of VARBC vs off-line scheme (red positive impact)

  5. Model top 5hPa: until ch 11-12 Model top 10 hPa: until ch 10 In case of problem coming fro the surface, try to avoid the use of ch 5-6.

  6. Try to avoid the use of ch 5, in case you find negative impact ...

  7. Aircraft T bias One case: NOT FAIR, butwe can see larger warm bias in case of aircraft increments compared to that of radiosonde

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