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2007-10-16 ForschungsZentrum Juelich Semianr
1. Global and Global Dust and Smoke over North America Rudolf B. Husar Washington University, St. Louis, MO Seminar at Forschungszentrum Juelich, October 16, 2007 Germany
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3. What is the magnitude of the anthropogenic perturbation of natural processes? Windblown Dust Volcanic Emissions Industrial Aerosols Aerosol are Indicators of Major Biogeochemical Processes Chistian Junge: “In the 50’s wherever you looked there was something interesting” Smoke from Fires
4. Early Satellite Detection of Manmade Haze, 1976 Regional Sulfate Haze over the Midwest Low Visibility Hazy ‘Blobs’ Lyons W.A., Husar R.B. Mon. Weather Rev. 1976 SMS GOES June 30 1975
10. The Asian Dust Event of April 1998 On April 19, 1998 a major dust storm occurred over the Gobi Desert The dust cloud was seen by SeaWiFS, TOMS, GMS, AVHRR satellites The transport of the dust cloud was followed on-line by an an ad-hoc international group China Mongolia Korea
11. Asian Dust Cloud over N. America On April 27, the dust cloud arrived in North America. Regional average PM10 concentrations increased to 65 g/m 3 Asian Dust 100 g/m 3 Hourly PM10
12. IMPROVE Fine Particle Dust Concentrations April 25, 1998 April 29, 1998 May 2, 1998 April 1998 Asian Dust event detection, analysis, reporting by ad-hoc international virtual (web-based) workgroup!! A driver for informatics effort on data sharing and collaboration
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15. Seasonal Fine Aerosol Composition, E. US Upper Buffalo Smoky Mtn Everglades, FL Big Bend, TX
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17. Satellites detect dust most storms in near real time The MODIS sensor on AQUA and Terra provides 250m resolution image s of the dust storm Visual inspection reveals the dust sources at the beginning of dust streaks. The NOAA AVHRR sensor highlights the dust by its IR sensors In the TOMS satellite image, the dust signal is conspicuously absent – too close to the ground
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20. Origin of Fine Dust Events over the US Fine dust events over the US are mainly from intercontinental transport Dust is seasonal with noise Random short spikes added Sulfate is seasonal with noise Noise is by synoptic weather
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25. Smoke Aerosol and Ozone During the Smoke Episode – Inverse Relationship The surface ozone is generally depressed under the smoke cloud Extinction Coefficient (visibility) Surface Ozone
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