Spectroscopic database GEISA-08 : content description and assessment through IASI/MetOp flight data

Transcription

1 Spectroscopic database GEISA-08 : content description and assessment through IASI/MetOp flight data Jacquinet-Husson N., Capelle V., Crépeau L., Scott N.A., Armante R., Chédin A. Laboratoire de Météorologie Dynamique Atmospheric Radiation Analysis Group Ecole Polytechnique 91128, Palaiseau, France

2 OUTLINE

3 GENERAL CONTEXT

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5 Satellite data In situ Radiosoundings Desarchiving Channel sélection Data Archive 100 To Cloud detection Spatio-temporal collocation Desarchiving Quality control GEISA SPECTROSCOPIC DATABASE A priori infos Radiative Transfer Direct Models Clear sky or scattering medium nadir or limb Radiative Transfer Inverse Models - Bayesian inference - Neural Networks - Clustering Model/observation bias computation Instruments monitoring Scientific Themes - Thermodynamics - Clouds - Greenhouse gases - Continental surfaces - Aerosols -etc Courtesy A. Chédin, Trattoria/CNES 2-3 April 2008

6 MORE RECENT REFERENCES Jacquinet-Husson N. et al. The 2003 edition of the GEISA/IASI spectroscopic database. JQSRT, 95, , 2005 Jacquinet-Husson N. et al. The GEISA spectroscopic database: Current and future archive for Earth and planetary atmosphere studies JQSRT, 109, , 2008

7 GEISA and GEISA/IASI System Overview

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9 GEISA/IASI DATABASE GENERALCONTEXT Extraction of GEISA-08 between 599 & 3001 cm -1 Individual spectral lines spectroscopic parameters sub-database 14 molecules (53 isotopic species): H 2 O, CO 2, O 3, N 2 O, CO, CH 4, O 2, NO, SO 2, NO 2, HNO 3, OCS, C 2 H 2, N 2 IR absorption cross-sections sub-database (mainly CFC s) 6 molecular species: CFC-11, CFC-12, CFC-14, CCl 4, N 2 O 5, HCFC-22 Microphysical and optical properties of Basic Atmospheric aerosol components sub-database (similar with the GEISA-03 one) Continuous update Related with: CNES/EUMETSAT EPS mission IASI measurement capabilities assessment ISSWG Associated interest for AIRS IASI : Infrared Atmospheric Sounder Interferometer AIRS : Advanced InfraRed Sounder ISSWG : IASI Sounding Science Working Group CNES : Centre National d Etudes Spatiales, France EUMETSAT : EUropean organization for the exploitation of METeorological SATellites

10 Scott & Ch din, J.Appl.Met (1981); 4A/LMD 4A/OP co-developed by LMD and Noveltis with the support of CNES (2006)]

11 GEISA and associated facilities are implemented on the Ether (CNRS/IPSL) Products and Services Centre (CPS) Effective January 2007 Ether Products and Services Centre Facilities:

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14 Spectral range: 0 35,877 cm-1

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16 255 Characters record 30 Parameters

17 Water specific Standardized parameter missing values for GEISA-08 as a whole

18 MOl. ID SPECTRAL RANGE/ BAND ID. GEISA-03 GEISA-08 update Ʋ Ʋ Ʋ 9 Ʋ Ʋ Ʋ Ʋ Ʋ Ʋ Ʋ )

19 MOl. ID SPECTRAL RANGE/ BAND ID. GEISA-03 GEISA-08 update Ʋ Ʋ Ʋ Ʋ Ʋ

20 MOl. ID SPECTRAL RANGE/ BAND ID. GEISA-03 GEISA-08 update Ʋ Ʋ Ʋ Ʋ Ʋ 6 New Molecular Species

21 MOl. GEISA-03

22 Updates for 2008 Edition of GEISA/IASI line transition parameters sub-database Molecular species already archived in GEISA/IASI H 2 O cm -1 LISA, JPL CO cm -1 JPL, LTS N 2 O cm -1 JPL CH cm -1 ICB, JPL cm -1 SO 2 Ʋ 1,Ʋ 3 LISA Ʋ 1 +Ʋ 2 Ʋ 2 GSMA HNO 3 Ʋ 5 ; 2Ʋ 9 LISA C 2 H cm -1 LADIR Molecular species related with IASI Trace Gas Retrievals to be added HCN NH3 HCOOH C2H4 CH3OH New PF 3.2 Version (courtesy of J.M. Flaud) to be considered

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24 Spectral intervals: cm cm cm -1 =====================================================================================. =====================================================================================

25 IASI brightness temperature (K) simulation with GEISA-03 (upper curve); Impact of replacement of HITRAN-04 or MIPAS PF3.2 H2O data in GEISAIASI-03 differences (K) in lower curves, with associated IASI noise. IASI noise Brightness temperature Différences (K)

26 Brightness temperature Différences (K)

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29 GEISA-03 vs GEISA-08 Air-broadening HW differences (%) Brightness temperature différences (K) GEISA-03 vs HITRAN-06 Air-broadening HW differences (%) Wavenumber (cm -1 )

30 GEISA-03 vs GEISA-08 Air-broadening HW differences (%) Brightness temperature Différences (K) GEISA-03 vs HITRAN-06 Air-broadening HW differences (%) Wavenumber (cm -1 )

31 GEISA-03 vs GEISA-08 Air-broadening HW differences (%) Brightness temperature différences (K) GEISA-03 vs HITRAN-06 Air-broadening HW differences (%) Wavenumber (cm -1 )

32 Concluding Comments

33 Some conclusions of validation exercises, using e.g. : the 4A-00/LMD Model, in the case of IASI radiative transfer modelling

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35 THANK YOU FOR YOUR ATTENTION