Extreme Precipitation (OCR GCSE Geography B (Geography for Enquiring Minds)): Flashcards
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Precipitation
Precipitation
Water falling from atmosphere as rain, sleet, snow, or hail
Low pressure effect on precipitation
Low pressure effect on precipitation
Rising air cools & condenses = wet conditions
High pressure effect on precipitation
High pressure effect on precipitation
Sinking air warms, holds moisture = dry conditions
Frontal rainfall
Frontal rainfall
Warm air rises over cold air where air masses meet
Convectional rainfall
Convectional rainfall
Intense surface heating causes air to rise, cool, precipitate
Relief (orographic) rainfall
Relief (orographic) rainfall
Air forced to rise over mountains, cools, condenses
Rain shadow
Rain shadow
Dry leeward side of mountain after air loses moisture
Khasi Hills, India - rainfall (July 1861)
Khasi Hills, India - rainfall (July 1861)
9,300 mm (wettest place on Earth)
Atacama Desert - annual rainfall
Atacama Desert - annual rainfall
15 mm (driest hot desert on Earth)
Why is Antarctica so dry?
Why is Antarctica so dry?
Air too cold to hold water vapour; high pressure systems