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Unformatted text preview: Outline—May 12, 2009 Outline Impacts of acid rain (chemistry) Impacts Fog-smog-fog cycle Fog Wet deposition—key reactions Wet Particles in the troposphere (Chapter 9) Particles
– Particulate matter = PM Sources of PM Sources Gas/particle partitioning Gas/particle Size modes and formation mechanisms Size Size vs. chemistry Size Atmospheric lifetime vs. size Atmospheric Loss of nitrate (NOx) Loss (and sulfate (SOx)) from our atmosphere Gas/particle/aqueous phase reactions
Know these reactions and phases involved H2SO4/HNO3
Uptake into aqueous droplets
SO2(g) Heterogeneous Reactions Droplets
HNO3(g) Particle phase Rain or wet deposition Scavenged by rain droplets Sources of Aerosol Particles Sources
Coal burning wildfires ships aircraft sea spray vehicles Pollen Complexity of Individual Particles Smoke (KCl/organic) Biomass “tarball” Coccolith Soot Sea Salt (reacted) ...
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