ATMOSPHERIC CHEMISTRY APPLICATIONS WORKSHOP 20-21 January 2004, ESTEC

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ATMOSPHERIC CHEMISTRY APPLICATIONS WORKSHOP
20-21 January 2004, ESTEC

• Albert P H Goede
• Objective of the Workshop
• User Consultation on present and future needs for
  atmosphere chemistry observations
• Definition of Integrated Global Observation
  System, notably the satellite component

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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 troposphere
• Air Pollution CLRTAP (Convention Long-Range
  Transport), EC directives on air quality,
  Policy support
• Forecasts ozone layer and surface UV
• chemical weather, improvement of NWP
• aviation management

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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.)

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Working Group Composition

• WG 1Air Quality Monitoring (chair
  Boucher/rapporteur Monks)
• ETCACC RIVMNILU, 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

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Application Areas
Global Oxidizing Capacity (mainly OH)
Global tropospheric O3 trends
Global long range transport of pollutants
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Policy And Science foundation

• Policy makers

Action taken (reduce emissions)
Observed Change, e.g. in tropospheric O3
Causes for the change
Scientists

• Differentiate requirements between
• Trend monitoring
• Analysis of the underlying Processes (Causes?)

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Policy and Science foundation (II)

• Global Tropospheric O3
• Kyoto (Greenhouse Gas)
• Air quality (Constrain for the BL O3)
• Oxidizing Capacity / Power / Efficiency
• Kyoto (methane growth rate)
• Post Montreal (HCFCs concentrations)
• Global LRT
• CLRTAP

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User Needs

• Global Tropospheric O3 trends
• Climate Impacts (UTLS)
• Horizontal Scale 100 km.20 km
• Vertical Scale 1km .100m
• Temporal .. 3 days3 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 (gt 2 solar cycles)

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Analysis of Causes Need additional data
Deposition Strat/Trop Exchange Photolysis Rates
Temperature Hydrocarbons (VOC, natural) (Not in
IGACO)! CO CH4 H2O NOx (NO NO2!) CH2O PAN
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Oxidizing Capacity

• Trend in OH
• Globally lt1
• Regionally lt5
• Integrated quantity (e.g. weighted with CH4
  removal)
• Indirect Methods like methyl Chloroform,
  IGAC-GHOST
• Direct via H2O, O3, NOx, CH4, CO, ..model
• p.m. BrO, NO3, .

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Oxidizing Capacity

• Analysis of Causes
• Why is OH changing ---gt process level
• Production
• O3, NO NO2, H2O2, ROOH, photolysis,
  Temperature, H2O
• Loss
• CO, CH4, Hydrocarbons, CH2O, O3, NO2,
• Related
• HO2, CH3O2,
• Relevant Scales..(IGACO)

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Oxidizing Capacity (cont)

• Modelling is needed
• Emissions (NOx, Biomass Burning)
• Surface Albedo, J-values, Aerosols,

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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)

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Integrated Observing System

• Satellites can not provide everything
• Models
• Inverse modelling / data assimilation
• Surface Observations/ Aircrafts, Balloons
• Process Studies, Campaigns

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Integrated Observing System (strategy)
Satellites
Surface Measurements
Aircraft
Assimilation/Inv. Modelling
Biosphere
Models
Emissions
Biomass Burning
J-values
Lightning
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User Segment
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Strategy