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AP environmental science


wind system that influences large climate and reverses direction seasonally

la nina

every 4-12 years, cools ocean surface on west

hadley cells

vertical and horizontal wind patterns

el nino

every 3-7 years, lasts 1 year


region of ocean near equator with calm winds

jet stream

high speed currents, affect local weather

polar easterlies

winds below latitude 60 degrees


travel S. and W. in northern hemisphere, west to north in southern hemisphere


constant weather patterns after 30 years. ex-avg. temp. and precipitation


80 km above earth's surface, where meteors burn up


110 km above Earth's surface, thinnest gas layer; absorbs solar wind and reflects radio waves


top of troposphere, temperature is high b/c of thin ozone

dew points

temp. when water vapor condenses to water

convection currents

holds lots of moisture

coriolis effect

winds in N hemisphere deflect right, south winds deflect left

greenhouse effect

traps solar radiation


10-20 km, where ALL weather takes place and clouds


layer of gas held close to Earth b/c of gravity

why Earth unevenly heated

1) more solar rays hit equator than poles. 2)tilt points away or closer to sun. 3) equator moves quicker than poles.

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