Page 1 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 4D-VAR chemical data assimilation of ENVISAT chemical.

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Page 1 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December D-VAR chemical data assimilation of ENVISAT chemical products (BASCOE): validation support issues Authors: D. Fonteyn, S. Bonjean, S. Chabrillat, F. Daerden, Q. Errera BIRA-IASB bascoe.oma.bebascoe.oma.be (soon)

Page 2 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December D-VAR chemical data assimilation of ENVISAT chemical products (BASCOE): validation support issues  BASCOE: v1.01 (57 species, psc, 5° × 5°, 37 vertical levels)  MIPAS NLE: O 3, H 2 O  MIPAS NRT all chemical species: problems reading pds-files  ECMWF analysis  Background error covariance ›› observation error covariance  Spatial correlations

Page 3 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 BASCOE: qualitative comparison Groundstations: total column Effect of horizontal resolution

Page 4 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Comparison with MIPAS_NLE observations:  Constraining observations  Non-constraining observations (5 %): independent non- biased observations, representativeness of MIPAS

Page 5 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Constraining observationsNon-constraining observations: not used in assimilation MIP_NLE O 3

Page 6 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 MIP_NLE H 2 O Constraining observationsNon-constraining observations: not used in assimilation

Page 7 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Time evolution co-located H 2 O BASCOE MIP_NLE and HALOE

Page 8 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Time evolution co-located CH 4 BASCOE MIP_NLE and HALOE

Page 9 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Time evolution co-located HCl BASCOE MIP_NLE and HALOE

Page 10 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Quantitative comparison: co-located means + std deviation  BASCOE, l HALOE sunrise sunset

Page 11 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Quantitative comparison HALOE – BASCOE MIP_NLE: co-located mean difference + std deviation sunrise sunset

Page 12 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Quantitative comparison: co-located means + std deviation  BASCOE, l HALOE

Page 13 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Quantitative comparison HALOE – BASCOE MIP_NLE: co-located mean difference + std deviation

Page 14 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 NRT validation: Cloud top height Thanks to Univ Leicester

Page 15 Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002 Conclusions  Successful assimilation of MIP_NLE, representing MIPAS_NLE state  Ozone column compares well with groundstation observations  Quantitative comparison with HALOE:  Expectations of MIPAS recommendations: impatience  Cloud top height !  Chlorine budget ! MIPAS potential  Ground segment ! Coverage! pds format!