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Validation of convective mass fluxes in ERA-40

Validation of convective mass fluxes in ERA-40. Dirk Olivié June 10 th , 2003. ECMWF model. ERA-40 data. Radon measurement. Emission from the continent : 1 atom/(cm 2 s) Short lifetime : 5.5 days. STEP campaign : Australia. Jan-Feb 1987 : monsoon

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Validation of convective mass fluxes in ERA-40

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  1. Validation of convective mass fluxes in ERA-40 Dirk Olivié June 10th, 2003

  2. ECMWF model ERA-40 data

  3. Radon measurement • Emission from the continent : 1 atom/(cm2 s) • Short lifetime : 5.5 days

  4. STEP campaign : Australia • Jan-Feb 1987 : monsoon • Extensive convective activity and rainfall

  5. Facts • 9 flights • 55 (172) samples - 10 minutes • Height : between 12 km (200 hPa)and 18 km (75 hPa)

  6. Conclusions • Archived data is better than off-line diagnosed data • Effect of different parameterization is strong • Effect of time-averaged w.r.t. instantaneous sampling is small

  7. Appendix

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