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weather
Climate
• Average weather conditions over time
Climate
Determines the global distributions of ecosystems
Global Air Circulation Patterns
affect climate
Fig. 43.3, p.756
winds from various directions
b Deflections in the initial patternnear Earth’s surface.
a Initial pattern of air circulation as airmasses warm and rise, then cool and fall.
as do
• rotation around the sun• land masses and oceans• latitude• elevation