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WP4 Tropospheric composition Reeves, Coe, Heard, Lewis, Monks, Pyle

WP4 Tropospheric composition Reeves, Coe, Heard, Lewis, Monks, Pyle. In the case of WP4 the objectives have been subdivided so that individual groups (first-named) lead the activity in that area: WP4.1 UEA , UMIST, Leeds, York, Leicester WP4.2 UMIST , UEA, York

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WP4 Tropospheric composition Reeves, Coe, Heard, Lewis, Monks, Pyle

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  1. WP4 Tropospheric composition Reeves, Coe, Heard, Lewis, Monks, Pyle In the case of WP4 the objectives have been subdivided so that individual groups (first-named) lead the activity in that area: WP4.1 UEA, UMIST, Leeds, York, Leicester WP4.2 UMIST, UEA, York WP4.3 Leicester, Leeds, UEA WP4.4 Leeds, Leicester, York, UMIST WP4.5 Cambridge

  2. Isoprene Surface Vegetation and Soil Surface Temperature • Interactions between the land surface, monsoon dynamics and atmospheric composition. • e.g. land surface affects surface temperature, which affects • biogenic emissions • monsoon dynamics and subsequently rainfall and thus emissions Isoprene emissions

  3. Biogenic Emissions Mat Evans – GEOS-CHEM

  4. HIGH AFRICAN BIOGENIC VOC EMISSIONS SEEN BY GOME T. Kurosu (SAO) and P. Palmer (Harvard)

  5. Anthropogenic v Natural Sources of NOX Mat Evans – GEOS-CHEM

  6. Western Africa is one of the world’s most active lightning regions ! DJF JJA LIS lightning flashes (2000)

  7. Vertical Distribution of Emissions Redistribution by Convection etc. Mat Evans – GEOS-CHEM

  8. Western Africa is one of the world’s most active biomass burning regions! Winter season Summer season Seasonal variation of ATSR fire counts.

  9. Aerosols (dust, biomass burning, secondary organic aerosols) African outflow Infra-Red Difference Dust Index – July 1983-98 (Brooks and Legrand, 2000) SeaWiFS image – 26/02/00 (NASA/GSFC and ORBIMAGE

  10. GEOS-CHEM - 1997 TOMS (CCD)- 1997 Large difference between model and TOMS tropospheric O3 columns over W. Africa DJF MAM JJA SON Martin et al. [2002] WP4.1 To make, for the first time, comprehensive observations of the atmospheric composition within the WAM , and thereby to characterise the composition (trace gases and particles) of the different zones withinthe WAM system. (UEA, UMIST, Leeds, York, Leicester)

  11. Harmattan Flux Dust Desert Anthropogenic Biofuel Savanna Semidesert Steppe (grass, brush, thicket) Brush-grass savannah Deciduous forest – woodland savannah Forest Ocean Tropical rain forest (broadleaf evergreen) Monsoon Flux Biomass Burning WP4.2Relatethecomposition observedin the boundary layertoland surfaceandvegetation characteristics, as derived from satellite and ground-based observations in WP1 and WP2, and make a first attempt to derive airborne vertical fluxes of biogenic VOCs within the WAM. (UMIST, UEA, York)

  12. Latitude-pressure plot of equivalent potential temperature, with SAL boundaries (solid lines) and mixed layer (dashed), from JET2000 dropsondes. WP4.3 Use the improved understanding of the dynamics (WP3) to evaluate the role of the monsoon circulation in transporting chemical constituents within the WAM region (e.g. boundary layer to mid-troposphere). (Leicester, Leeds, UEA)

  13. Organics Sulphate Nitrate Ammonium WP4.4 Use the observational dataset to provide improved constraints on our understanding of how natural emissions (VOC and NOX) impact the chemistry (e.g. O3, HOX, secondary organic aerosol) of the WAM region, and the production of constituents that may be transported both into the TTL (WP5) and over regional and continental scales. This objective will relate the chemical control of the particulate material to its ability to act as cloud condensation nuclei and to affect theradiative properties of the particulates. (Leeds, Leicester, York, UMIST) H. Coe

  14. GEOS-CHEM - 1997 TOMS (CCD)- 1997 DJF MAM JJA SON Martin et al. [2002] WP4.5 Include the improvements made in the understanding of emissions (WP4.2), chemical degradation pathways (WP4.4) and on the temporal and spatial distribution of constituents (WP4.1, 4.3) in suitable models to investigate the global impact of biogenic emissions from the WAM regionon the burden of O3. (Cambridge) Link between TOMCAT and UM UM dynamics evaluated by other components within AMMA UK

  15. Input to WP4 Output from WP4 Project structure Cambridge UEA Cambridge Leeds Leicester UMIST York Leeds Liverpool CEH Wallingford

  16. Links to AMMA-EU WP2.4 Aerosol and chemical processes in the atmosphere AMMA-EU Kick-off meeting WP2.4 Workshop on Wed 16 Feb pm

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