ATMOSPHERIC CHEMISTRY APPLICATIONS WORKSHOP

20-21 January 2004, ESTEC

Albert P H GoedeObjective of the Workshop

User Consultation on present and future needs for atmosphere

chemistry observations Definition of Integrated Global Observation System, notably the

satellite component

Atmospheric Chemistry Applications

Climate Change Chemistry-climate interactions, UTLS,

atmospheric composition & trends, IPCC assessments

Montreal and Kyoto Protocol Monitoring and Verification stratospheric ozone, surface UV, GHG emissions, Policy support

Troposphere Cleansing power of atmosphere/trend

Chemistry free troposphereAir Pollution CLRTAP (Convention Long-Range

Transport), EC directives on air quality, Policy support

Forecasts ozone layer and surface UVchemical weather, improvement of

NWPaviation management

User input required on all 5 issues listed

User Needs and requirements (example, long term record total ozone, regional forecast air pollution etc, specify region/spatial resolution/temporal resolution/ averages, list of data products.)

User Segment (example, regional environmental agency, weather service, climate change agency etc)

Policy foundation (example, Kyoto, CLRTAP etc) Science review (what are the underlying science

issues, what do we know, what is still uncertain, ) Strategy for Integrated Observation System (What

infra structure is there on ground, in space and how to improve or fill gaps. What can be achieved in 2, 5, 10 years time and how to go about.)

Working Group Composition WG 1Air Quality Monitoring (chair Boucher/rapporteur

Monks)ETCACC RIVM+NILU, ADEME, ITC, EMPA, EPA, GMES-Daedalus, CERMES

WG 2 Montreal, Kyoto Protocol Monitoring (ch Barrie, rap Raes)

WMO, NILU, GMES-GATO, JRC-IES, RIVM-UV WG 3 Climate Chemistry (chair van Weele, rapporteur

Kerridge) DLR-IAP, KNMI, JRC, KfA Julich, SPARC, research

groups WG 4 Tropospheric Chemistry (chair Bovensmann, rap

Krol)MPI-Hamburg, U Heidelberg, IGBP-IGAC, ACCENT,

LISA, other research groups WG 5 Forecasting (chair Peuch, rapporteur Fishman)

Meteo-France, DWD, DMI, KNMI, INERIS, LISA, VITO

Application Areas

Global Oxidizing Capacity (mainly OH)

Global tropospheric O3 trends

Global long range transport of pollutants

Policy And Science foundation

Scientists

Policy makers

Observed Change, e.g. in tropospheric O3

Causes for the change

Action taken (reduce emissions)

Differentiate requirements betweenTrend monitoringAnalysis of the underlying Processes (Causes?)

Policy and Science foundation (II)

Global Tropospheric O3 Kyoto (Greenhouse Gas)Air quality (Constrain for the BL O3)

Oxidizing Capacity / Power / EfficiencyKyoto (methane growth rate)Post Montreal (HCFCs concentrations)

Global LRTCLRTAP

User Needs

Global Tropospheric O3 trends Climate Impacts (UTLS)

Horizontal Scale: 100 km…….20 km Vertical Scale: 1km …….100m Temporal ….. 3 days……3 hourly

Air Quality (PBL/FT) Horizontal Scale: 50 km…….10 km Vertical Scale: FT/PBL ……1km Temporal ….. 6 hours (fronts)… hourly

Assimilation: less stringent constraints GLOBAL COVERAGE Over Decades (> 2 solar cycles)

Atmospheric Chemistry Applications Workshop ESTEC 20-21 January 2004-

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Analysis of Causes :Need additional data

DepositionStrat/Trop ExchangePhotolysis Rates + TemperatureHydrocarbons (VOC, natural) (Not in IGACO)!COCH4H2ONOx (NO + NO2!)CH2OPAN…

Atmospheric Chemistry Applications Workshop ESTEC 20-21 January 2004-

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Oxidizing Capacity Trend in OH

Globally <1% Regionally <5%

Integrated quantity (e.g. weighted with CH4 removal)

Indirect Methods like methyl Chloroform, IGAC-GHOSTDirect: via H2O, O3, NOx, CH4, CO, …..+model

p.m. BrO, NO3, ….

Atmospheric Chemistry Applications Workshop ESTEC 20-21 January 2004-

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Oxidizing Capacity Analysis of Causes: Why is OH changing ---> process level

Production: O3, NO + NO2, H2O2, ROOH, photolysis,

Temperature, H2O Loss:

CO, CH4, Hydrocarbons, CH2O, O3, NO2, … Related

HO2, CH3O2, Relevant Scales…..(IGACO)

Atmospheric Chemistry Applications Workshop ESTEC 20-21 January 2004-

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Oxidizing Capacity (cont…) Modelling is needed:

Emissions (NOx, Biomass Burning) Surface Albedo, J-values, Aerosols, …

Atmospheric Chemistry Applications Workshop ESTEC 20-21 January 2004-

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Long Range Transport CO, NOx/NOy, O3, POPs, Hg Scales:

Horizontal Scale: 50 km…….10 km Vertical Scale: FT/PBL/UTLS ……1km Temporal ….. daily 6 hours (fronts)

Atmospheric Chemistry Applications Workshop ESTEC 20-21 January 2004-

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Integrated Observing System

Satellites can not provide everything:ModelsInverse modelling / data assimilationSurface Observations/ Aircrafts, BalloonsProcess Studies, Campaigns

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Integrated Observing System (strategy)

Models

Biosphere

Emissions

J-valuesBiomass Burning

Satellites AircraftSurface Measurements

Assimilation/Inv. Modelling

Lightning

User Segment

Strategy