• 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)

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

- 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)

AMMA Chemical Modelling On-going & Future Work

O3 from LMDzINCAO3 from all aircraft N-S flights

Courtesy: Bouarar, Schlager, FAAM, Yushkov, Safire, Nedelec

CO concentrations from LMDz-INCA (contours) and an idealized tracer over West Africa (Pham, Filiberti, Hourdin, IPSL, Paris)

sahara

sahel

guinee

southSouthAtlantic

Proposed AMMA Tracer ExperimentsFrederic 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?

IGBP-IGAC/WCRP-SPARCAtmospheric Chemistry and

Climate Project

Aims to improve understanding of climate forcing from chemical/aerosol agents &

their representation in models(feed into next IPCC/WMO)

Timeline (phase 1)

March 2006Pune, IndiaIGBP/ WCRP

SC/SSG

January 20071st Workshop

Geneva

definition of activities

summer 2007 Write-

up publication EOS, ACPD,

BAMS, ?

Dec 2007-Jan 2008

Workshop Real work begins,

experiments defined, Runs,

verification strategies

June 2008Workshop interpreting

results, writing papers

2006 2007 2008 2009

Papers submitted

Most model groups will

have “frozen” model

configs. for IPCC/WMO

August 2006 Planning WorkshopBoulder

selected issues & topics

“TroposChem” (IGAC)

(tropospheric gas-phase chem)

CCM-Val (SPARC)

(stratospheric chemistry)

AeroCom(tropospheric

aerosols)

Research Implementation Bodies

1. Emissions Harmonization2. Data Center3. AC&C Web page & “E-

newsletter”

WCRP-SPARC/IGBP-IGAC: AC&C

1. Composition impacts on climate2. Climate impacts on chemistry3. Climate impacts on surface-level

ozone & aerosols (“air quality”)

Unifying thematic areas

Cross-cuttingActivities

TF HTAP

GEIA

Observational Data

AC&C Research 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.

The Phase 1 task: Modeling Study Activities