Member of the Helmholtz-Association Collaboration with modelling community: Requirements, data use, products Martin Schultz

Member of the Helmholtz-Association Who are modellers? Scientific community: global and regional scale; CTM or chemistry climate; individual episodes or longer reanalyses; with/without data assimilation MOTIVATION: diverse, processes, climate change, arctic, … Regional AQ models with mandate: day-to-day business (analysis and forecasts); assessment of AQ; often without data assimilation; typical scale 50-1 km MOTIVATION: thresholds, doses, health, crops Global AQ analyses and forecasts (MACC etc.): day-to- day business (analysis and forecasts); reanalyses; assimilation usually of sat. data only; in MACC multi- species and multi-sensor assimilation MOTIVATION: global AQ, long-range transport, assessments

Member of the Helmholtz-Association MACC Key Points M onitoring A tmospheric C omposition and C limate 45-partner Collaborative Project Funded by European Union FP7 Coordination: Adrian Simmons (ECMWF) Ends October 2011; follow-on proposal (MACC-II) submitted Main service lines: ►Daily global analyses and forecasts of greenhouse gases, reactive gases and aerosol ►Daily ensemble forecasts of European-wide air quality ►Reanalysis ( ) Data assimilation / NRT data

Member of the Helmholtz-Association InstrumentSatelliteProviderVersionSpeciesTypePeriodStatus GOMEERS-2RALO3Profiles Active MIPASEnvisatESAO3Profiles Active MLSAURANASAV02O3Profiles Active OMIAURANASAV003O3Total column Active SBUVNOAA-16NOAAV8O36 layer profiles Active SBUVNOAA-17NOAAV8O36 layer profiles Active SBUVNOAA-18NOAAV8O36 layer profiles Active SCIAMACHYEnvisatKNMIO3Total column Active MOPITTTERRANCARV4COTotal column Active OMIAURAKNMICol. 3NO2Tropospheric column Passive SCIAMACHYEnvisatKNMIV1.1NO2Tropospheric column Active OMIAURANASAV003SO2Total column Passive SCIAMACHYEnvisatBIRASO2Total column Passive OMIAURANASAV003HCHOTotal column Passive SCIAMACHYEnvisatBIRAV2HCHOTotal column Passive MODISAQUANASAAODTotal column Active MODISTERRANASAAODTotal column Active SCIAMACHYENVISATSRONCH4Total column Active TANSOGOSATJAXACH4Total column Passive AIRSAQUANASACO2Radiances Active IASIMETOPEUMETSATCO2Radiances Active TANSOGOSATJAXACO2Total column Passive Satellite data assimilated in MACC reanalysis

Member of the Helmholtz-Association Requirements Who are the users? Do you want to accomodate all users? Do users know what they want? Do they have to know? What happens if requ‘s cannot be met? Nevertheless: need to specify something!

Member of the Helmholtz-Association Variability and network design from CEOS Geo position paper, 3/2011

Member of the Helmholtz-Association Surface ozone background stations (WDCGG) Ian:- half of grid cells empty (2/3 in southern hemisphere) - install automated systems (buoys)?

Member of the Helmholtz-Association Surface ozone station network density EUROPE GLOBAL

Member of the Helmholtz-Association courtesy: V-H Peuch, Meteo-France

Member of the Helmholtz-Association Tropospheric ozone change from preindustrial to present % Gauss et al., 2006 (ACP) 4/10 models

Member of the Helmholtz-Association Model-model comparisons

Member of the Helmholtz-Association How sure are we about past trends in emissions? anthropogenic biomass burning CO NO x from Granier et al., 2011 (subm.) Recent issue: CO traffic emissions EU&NA underestimated?

Member of the Helmholtz-Association How well do we model tropospheric ozone? Stevenson et al (ACCENT)

Member of the Helmholtz-Association Comparison of simulated PAN concentrations MODEL 1MODEL 2 MODEL 3MODEL 4 HTAP multi-model experiment, SR1, August 2001, p=980 hPa arbitrary location in Europe Looking beyond ozone and CO

Member of the Helmholtz-Association The „value“ of data for (global) modelling low valuehigh value individual station poor characterisation poor representativeness bad/unknown quality data slow and irregular data submission access restrictions complicated protocols varying data formats poor metadata (dense) station network good characterisation known representativeness/filters good and known data quality regular data submission in time free access standard data formats comprehensive standard metadata version tags

Member of the Helmholtz-Association courtesy: V-H Peuch, Meteo-France; L. Rouil, INERIS

Member of the Helmholtz-Association Data consistency and completeness (WDCGG vs. EMEP) EMEP WDCGG

Member of the Helmholtz-Association „NRT“ data from 8 GAW stations: - 2 EU - 4 Asia - 2 SHem ONLY 4 HAVE DATA FOR MARCH

Member of the Helmholtz-Association NRT data delivery: requirements and issues (see GAW report 189) 6 hours after obs 24 hours after obs 3 days after obs 1 month after obs 1 year after obs N years after obs suitable for NRT assimilation suitable for NRT validation suitable for delayed NRT validation suitable for reanalysis assimilation

Member of the Helmholtz-Association NRT data = preliminary data DQO can be relaxed (for example: 5 ppb for O 3 ) Comparison with forecast may shed light on measurement problems Preliminary data should be replaced with final data (as rapidly as possible) Preliminary data must not be used for assessments

Member of the Helmholtz-Association B etter fit to MOZAIC/IAGOS O 3 data in MACC reanalysis. Tropospheric bias is reduced by 25%. MACCGEMS Free tropospheric ozone

Member of the Helmholtz-Association The way forward Automated data distribution systems (WCS demo)WCS demo Better integration of regional networks into GAW (?) More NRT data delivery Standardisation of metadata Develop standardized filters Dataset version tagging (incl. calibration history)

Member of the Helmholtz-Association

NO 2 O3O3

Member of the Helmholtz-Association

courtesy: V-H Peuch, Meteo-France; L. Rouil, INERIS