CHEM H90 Lecture Notes - Lecture 21: Reactive Oxygen Species, Atmospheric Chemistry, Photochemistry
Multiphase Chemistry of Reactive Oxygen Species Influencing Climate, Air Quality, and Public
Health
• research
o atmospheric chemistry
o air pollution
o aerosol particles
o kinetic modeling
o lab experiments
• anthropocene: new age in earth and human history
o scientific fact that greenhouse gases increased after industrial revolution
o humans are shaping our planet
▪ our planet influence atmospheric composition and temperature
• atmosphere and climate
o aerosols and gases
o clouds and precipitation
o radiation and dynamics
• air pollution and health effects
o pristine vs. polluted
o air pollution leads to 4.2 million premature deaths per year worldwide
• motivation: air pollution is a threat to human health, bu the underlying chemistry at the
atmosphere-biosphere interface are poorly understood. Reactive Oxygen Species play a
central role
o atmospheric effects → atmospheric sources
▪ atmospheric effects
• oxidation and self cleaning
• aging of organic aerosols
▪ atmospheric sources
• photochemistry
• combustion
• ozone reaction with skin
o skin is reactive
o air pollution and global environmental change → oxidative stress and adverse
health effects (asthma, allergies, etc.)
o smaller particles more dangerous because they can go deeper into body
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