4d-var chemical data assimilation of envisat chemical products (bascoe): validation support issues
DESCRIPTION
4D-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.be (soon). - PowerPoint PPT PresentationTRANSCRIPT
Page 1Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
4D-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.be (soon)
Page 2Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
4D-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: O3, H2O
MIPAS NRT all chemical species: problems reading pds-files
ECMWF analysis
Background error covariance ›› observation error covariance
Spatial correlations
Page 3Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
BASCOE: qualitative comparison
Groundstations: total columnEffect of horizontal resolution
Page 4Validation 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 5Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
Constraining observations Non-constraining observations: not used in assimilation
MIP_NLE O3
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MIP_NLE H2O
Constraining observations Non-constraining observations: not used in assimilation
Page 7Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
Time evolution co-located H2O BASCOE MIP_NLE and HALOE
Page 8Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
Time evolution co-located CH4 BASCOE MIP_NLE and HALOE
Page 9Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
Time evolution co-located HCl BASCOE MIP_NLE and HALOE
Page 10Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
Quantitative comparison:co-located means + std deviation
BASCOE, l HALOE
sunrise sunrise sunset
Page 11Validation 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 sunrise sunset
Page 12Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
Quantitative comparison:co-located means + std deviation
BASCOE, l HALOE
Page 13Validation 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 14Validation by Model Assimilation and/or Satellite Intercomparison - ESRIN 9–13 December 2002
NRT validation: Cloud top heightThanks to Univ Leicester
Page 15Validation 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!