ISSI WG on H 2 O Bern Switzerland

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ISSI WG on H 2 O Bern, Switzerland Feb. 11 -14, 2008 Contribution to GEO-CEOS ? A possible contribution of the ISSI WG on Atmospheric H 20 to GEO-CEOS WGCV activities Contacts: Jean-Christopher LAMBERT and Bojan BOJKOV j-c. lambert @ aeronomy. be, bojan. bojkov @ nasa. gov

ISSI WG on H 2 O Bern, Switzerland Feb. 11 -14, 2008 Contribution to GEO-CEOS ? H 20 contributes to several Societal Benefit Areas as defined by the GEO

ISSI WG on H 2 O Bern, Switzerland Feb. 11 -14, 2008 Contribution to GEO-CEOS ? § GEO Task DA-06 -02 assigned to CEOS WGCV Committee on EO Satellites: http: //www. ceos. org WG on Calibration and Validation: http: //wgcv. ceos. org § Relevant topics: • • Characterisation and Classification of Cal/Val Sites Satellite and In Situ Cal/Val Data Access Methodology and Guidelines for Cal/Val Harmonisation of Quality Information

ISSI WG on H 2 O Bern, Switzerland Feb. 11 -14, 2008 Establishing Best Practices in Atmospheric Composition Cal/Val Contribution to GEO-CEOS ? Current Status § No ISO-type standards for validation § Mostly "traditional practices" § "Best practices" depend on: § § § Atmospheric species Atmospheric state, measurement conditions Measurement technique Target user of validation results Target user of observation data Resources for validation

ISSI WG on H 2 O Bern, Switzerland Feb. 11 -14, 2008 Establishing Best Practices in Atmospheric Composition Cal/Val Contribution to GEO-CEOS ? Contribution of ISSI WG on H 2 O? § § § Characterise data and sites => fact sheets For every technique, identify (published or commonly agreed) best practices for data comparison and for satellite validation Define own data quality strategy, data policy, data access, operational status The ISSI book might be an excellent reference document for/endorsed by CEOS. Relevant information to appear also on CEOS Cal/Val portal http: //calvalportal. ceos. org

ISSI WG on H 2 O Bern, Switzerland Feb. 11 -14, 2008 Contribution to GEO-CEOS ? Annex 1: Tentative list of generic H 2 O data users • • • Instrument and calibration scientists Geophysical validation of satellite observations Developers of retrieval algorithm (first guess and covariance, sensitivity studies…) Radiative transfer: atmospheric correction (IVOS), climate forcing (GHG)… Chemistry: heterogeneous chemistry, source of OH, reservoirs, diurnal cycles… Dynamics Microphysics Evaluation of CT modelling and data assimilation: R&D, operational verification GMES-like service (validation) scientists Independent audit of GMES-like services and of their validation International organisations: SPARC, WMO, EMEP…

ISSI WG on H 2 O Bern, Switzerland Feb. 11 -14, 2008 Contribution to GEO-CEOS ? § Annex 2: Generic timeliness of data delivery and quality classes • • Class 1: <3 -6 hours, NRT Q: NRT verification of forecasts Class 2: <one month, NRT Q: stability of uncertainties Class 3: < 3 -6 months, NRT/best Q: mid-term assessment Class 4: best Q: accurate validation after every cycle of one year and after every processor upgrade

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