Pollution Increases Summer Precipitation
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In summer, weaker winds move the clouds more slowly. Heat absorbed by the city and pollution's interference with raindrop formation interact to cause the clouds to intensify before producing precipitation. The onset of rainfall from a cloud leads eventually to its demise by cooling off the air near the ground. the air pollution delays the onset of precipitation, so that the intense storm clouds can build higher and larger before they start precipitating and subsequently dissipating. Therefore, these larger and more intense thunderstorm clouds produce eventually heavier rainfall on the city and the downwind areas. First is the unpolluted, then the polluted case.
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This animation shows summer precipitation without the effects of pollution.
Duration: 23.0 seconds
Available formats:
320x240 (30 fps)
MPEG-1
3 MB
320x240
JPEG
9 KB
75x56
JPEG
1 KB
720x486
Frames
(Unpolluted)
720x480 (29.97 fps)
MPEG-2
13 MB
640x480 (29.97 fps)
MPEG-4
6 MB
320x240 (30 fps)
X-FLV
896 KB
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This animation shows the increase in summer precipitation related to pollution.
Duration: 23.0 seconds
Available formats:
320x240
JPEG
9 KB
320x240 (30 fps)
MPEG-1
3 MB
720x486
Frames
(Polluted)
320x240
PNG
92 KB
160x80
PNG
20 KB
720x480 (29.97 fps)
MPEG-2
15 MB
640x480 (29.97 fps)
MPEG-4
8 MB
320x240 (30 fps)
X-FLV
877 KB
How to play our movies
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