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AP environmental science

monsoon

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

doldrums

region of ocean near equator with calm winds

jet stream

high speed currents, affect local weather

polar easterlies

winds below latitude 60 degrees

westerly

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

climate

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

mesosphere

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

thermosphere

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

stratosphere

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

troposphere

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

atmosphere

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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