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© Imperial College LondonPage 1 Quantifying the direct radiative effect of Saharan dust aerosol over north-west Africa and the tropical Atlantic Richard Bantges Space & Atmospheric Physics
© Imperial College LondonPage 2 Project Aims Spatial / temporal variability of dust Radiative impact on TOA SW & LW Impact at the surface – temporal & spatial variability Develop algorithms to retrieve SW & LW surface fluxes from satellite observations From retrievals – dust impact on SRB over African continent
© Imperial College LondonPage 3 Dust aerosol detection Case Study I: 0000 UTC, 3 rd March – 2300 UTC, 5 th March, 2004 Red: 12.0-10.8 m, Green: 10.8-8.7 m, Blue: 10.8 m Red: 1.6 m, Green: 0.8 m, Blue: 0.6 m
© Imperial College LondonPage 4 1155 UTC 04/03/04 1405 UTC 05/03/04 SEVIRI MODIS 1200 UTC 04/03/04 1400 UTC 05/03/04
© Imperial College LondonPage 5 Diurnal variation in AOD: 05/03/04
© Imperial College LondonPage 6 Impact on broad-band TOA reflected SW radiance/flux 05/03/04
© Imperial College LondonPage 7 Net surface radiation from satellite observations LOwland CAtchment Research (LOCAR) Estimates of grid/catchment area average evaporation Network of ground stations Satellite data (AVHRR, MODIS, SEVIRI) Scaling: Point → Field → Catchment
© Imperial College LondonPage 8
© Imperial College LondonPage 9
© Imperial College LondonPage 10
© Imperial College LondonPage 11 Benefits Temporal & spatial patterns of dust aerosol over African continent Enhanced SRB components in the presence of dust aerosol → hydrological balance Addition information to use in assessing impacts of climate change on water supply, crops, animal and human conditions
© University of Reading Richard Allan Department of Meteorology, University of Reading Thanks to: Jim Haywood and Malcolm.
EUMETSAT 2006 Helsinki Exploitation of GERB/SEVIRI data for evaluation of the Met Office global forecast model Richard Allan, Tony Slingo Environmental.
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GOES-R, May 2004 Coastal Ocean Science Harmful Algal Blooms and GOES-R GOES-R Users Conference, 2004 SeaWiFS data from OrbImage, Inc. Richard P. Stumpf.
21.3 Climate Change. Natural Processes That Change Climate Volcanic eruptions The presence of volcanic ash, dust, & aerosols in the air increases the.
1 CERES Results Norman Loeb and the CERES Science Team NASA Langley Research Center, Hampton, VA Reception NASA GSFC, Greenbelt, MD.
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