1. Global and Local Dust/Smoke over the US Rudolf Husar Washington University EPA Science Advisory Board Science Workshop, Dc. 11, 2003 Emerging Scientific Topics: Transboundary Air Pollutants

3. Industrial Sulfur Emission Density US SO x Emission Trend Industrial Sulfur Emissions Hotspots: E. North America Europe and E. Asia The US and European S Emissions have declined since the ’70s Within the next generation S will likely approach the natural levels

4. Regional Haze Rule: Transition Toward a Sustainable Air Quality Goal of RH Rule: To attain ‘natural conditions’ by 2064

6. Global (Satellite) Sensing Revolution in the 1990s Aerosol Optical Depth (AVHRR) Global-scale air pollutant transport existed since…. The difference is that now we can observe and document it The new data show that the global aerosol pattern is dominated by dust and smoke .

10. May-June 2003 Siberian Fires

11. Aircraft Detection of Siberian Forrest Smoke near Seattle, WA Jaffe et. al., 2003

12. Asian Dust Cloud over N. America, April 1998 On April 27, 1998 the dust cloud arrived in North America. Regional average PM10 concentrations increased to 65  g/m 3 In Washington State, PM10 concentrations exceeded 100  g/m 3 Asian Dust 100  g/m 3 Hourly PM10

13. Korea Mongolia China The Perfect Dust Storm April 7, 2001

14. Sahara Dust Transport Supporting Evidence: Satellite & PM10 Data SeaWiFS satellite shows Sahara Dust reaching Gulf of Mexico June 30, 1993 July 5, 1992 June 21 1997 > 80  g/m 3

17. Thank You

18. Sustainable Development in an ever-changing world: Sensory-Motor Loop: Challenge 21: Science – Management Link Sensing and recognition (monitoring) Reasoning and explaining (sciences) Decision making, action (management)