Prsentation PowerPoint

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AMMA Chemical Modelling Activities (some of
them) CNRS-IPSL, CNRS-LA, KNMI, CNRM, UCAM,
CNR, LISA

• To quantify impact of WA emissions on global
  tropospheric composition, oxidising capacity,
  stratospheric composition and climate on seasonal
  inter-annual timescales
• To quantify role of deep convection on the
  chemical composition of the FT, UTLS
• etc..
• Strategy
• Global modelling - LMDz-INCA (SA), MIMOSA (SA),
  MOCAGE (CNRM), LOA, LA (TM4, RegCM), TM5 (KNMI),
  TOMCAT (UCAM)
• Regional modelling - BOLAM, Meso-NH, CHIMERE.
• Data analysis - satellite (MOPITT, IASI,
  CALIPSO, MODIS), MOZAIC, ozonesondes, aircraft
  balloon data (Lagrangian modelling)

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AMMA Chemical Modelling On-going Future Work

• Aircraft (and other) data analysis using
  mesoscale global models
• (convection, long-range transport, lightning,
  surface emissions - BB, soils, vegetation, .)
• Models used to calculate budgets/fluxes - major
  limitation is treatment of deep convection - need
  to evaluate param. Schemes
• (led by dynamicists - AMMA MIP
  http//amma-mip.lmd.jussieu.fr)

O3 from LMDzINCA
O3 from all aircraft N-S flights
Courtesy Bouarar, Schlager, FAAM, Yushkov,
Safire, Nedelec
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CO concentrations from LMDz-INCA (contours) and
an idealized tracer over West Africa (Pham,
Filiberti, Hourdin, IPSL, Paris)

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sahara
sahel
guinee
south
South Atlantic

• Proposed AMMA Tracer Experiments
• Frederic Hourdin (CNRS/LMD), Peter van
  Velthoven(KNMI)
• Regional tracers emitted at surface and FT (1000
  to 400 hPa) plus some global (SCOUT-like) tracers
  with ?-decay/ wet. dep./strat. tracer
• Define some common AMMA-SCOUT tracer
  experiments?

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IGBP-IGAC/WCRP-SPARC Atmospheric Chemistry and
Climate Project Aims to improve understanding of
climate forcing from chemical/aerosol agents
their representation in models (feed into next
IPCC/WMO)
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Timeline (phase 1)
January 2007 1st Workshop Geneva definition of
activities
Dec 2007-Jan 2008 Workshop Real work begins,
experiments defined, Runs, verification
strategies
June 2008 Workshop interpreting results, writing
papers
Most model groups will have frozen model
configs. for IPCC/WMO
2007
2008
2009
2006
Papers submitted
March 2006 Pune, India IGBP/ WCRP SC/SSG
August 2006 Planning Workshop Boulder selected
issues topics
summer 2007 Write-up publication EOS, ACPD, BAMS,
?
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WCRP-SPARC/IGBP-IGAC ACC
Unifying thematic areas

• Composition impacts on climate
• Climate impacts on chemistry
• Climate impacts on surface-level ozone aerosols
  (air quality)

Cross-cutting Activities

• Emissions Harmonization
• Data Center
• ACC Web page E-newsletter

ACC Research Activities
Research Implementation Bodies
TF HTAP
GEIA
Observational Data
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The Phase 1 task Modeling Study Activities

• Activity 1 A 20-25 year hind-cast of
  tropospheric ozone and aerosols - evaluation
  against observations
• Activity 2 Evaluation of processes controlling
  the distribution of aerosols/gases. Step 1
  Focus on 5km to tropopause (LS)
• Activity 3 Better representation of cloud,
  aerosol, and chemical interactions.
• Activity 4 Analyses of sensitivities and
  uncertainties in the future scenarios for climate
  models.