©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles
©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles
©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles 528 am EST Fri Nov Winter Storm Warning today... Expect lake effect snow showers to accumulate an additional 3 to 5 inches today. Sustained west to northwest winds of 20 to 30 mph with gusts to 40 mph will cause considerable blowing and drifting snow with near whiteout conditions at times into the afternoon. Look for the snow showers to continue at a reduced intensity tonight... with an additional 1 to 3 inches of snow possible. If you must drive in the warned area... be prepared for hazardous travel conditions and rapidly changing visibility. Carry a winter survival kit in your car in case you get stranded.
©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles
©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles National Ambient Air Quality Standards Carbon Monoxide (CO) 8-hour Average 9 ppm (10 mg/m3)Primary 1-hour Average 35 ppm (40 mg/m3)Primary Nitrogen Dioxide (NO 2 ) Annual Arithmetic Mean ppm (100 µg/m3) Primary & Secondary Ozone (O 3 ) 1-hour Average 0.12 ppm (235 µg/m3)Primary & Secondary Lead (Pb) Quarterly Average 1.5 µg/m3 Primary & Secondary Particulate (PM 10) Particles with diameters of 10 micrometers or less Annual Arithmetic Mean 50 µg/m3 Primary & Secondary 24-hour Average 150 µg/m3 Primary & Secondary Particulate (PM 2.5) Particles with diameters of 2.5 micrometers or less Annual Arithmetic Mean **15 µg/m3 Primary & Secondary 24-hour Average ** 65 µg/m3 Primary & Secondary Sulfur Dioxide (SO 2 ) Annual Arithmetic Mean0.03 ppm(80 µg/m3)Primary 24-hour Average 0.14 ppm (365 µg/m3)Primary 3-hour Average 0.50 ppm (1300 µg/m3)Secondary
©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles Los Angeles: 1943 Photo courtesy of Los Angeles Times Collection, Department of Special Collections, UCLA Library
©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles 120 ppb Los Angeles, CA
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©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles SO 2 -> Sulfate SO 2 O3O3 O3O3 OH H2O2H2O2 H2O2H2O2
©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles Haze
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©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles Visibility Degradation
©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles Haze in National Parks
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©2003 P. Samson, University of Michigan PBL Plumes Pollutants Particles china
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