Photochemical Smog a mixture of primary and secondary pollutants. Forms when primary pollutants interact under the influence of sunlight 最
Photochemical Smog • A mixture of primary and secondary pollutants. Forms when primary pollutants interact under the influence of sunlight
Photochemical Smog Two most destructive components 令 Ozone Peroxyacetyl Nitrates Large cities ringed by mountains tend to have trouble with photochemical smog pl
Photochemical Smog – Two most destructive components: Ozone Peroxyacetyl Nitrates – Large cities ringed by mountains tend to have trouble with photochemical smog
Photochemical Smog 2. Air at the surface 3. Warm, less dense 4. Pollutants are Thermal Inversions(逆温)c rises and mixes with cooler air Warm air becomes Pollutants are produced sandwiched between two layers of cold air and acts like a lid on the valley Thermal Inversion 1. Cool, more dense Cold air 3. Cool, dense surface air 4. Pollutants does not mix with warm valley. Warm air cannot rise The arrival of dense Warm air less dense air up causing smog accumulation Th 3. Cool, dense surface air Cold air oes not mix with warm air pushes warm, air above it. se air up Warm air 1. Cool, dense air flows in from the
Photochemical Smog • Thermal Inversions (逆温） - Warm air becomes sandwiched between two layers of cold air and acts like a lid on the valley. – Warm air cannot rise, causing smog accumulation