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50 Cards in this Set
- Front
- Back
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easterlie flow is from?
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east to west
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(wind direction) ITZ shifts north and south due to
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the sun
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what is the division between artic and warm midlatitude air?
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jet stream
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why is jet stream stronger in winter and weaker in summer?
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it is embedded in the upper level westerlies
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in between a ridge and a trough is a?
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convergence
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in between a trough and a ridge is a?
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divergence
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what does upper level convergence mean?
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sinking air
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air flows slower around?
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low pressure
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air flows faster around?
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high pressure
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how many rossby waves are usually circling the globe at one time?
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3-7
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what is an air mass battleground that circles the earth dividing the cold polar air from the warm midlatitude air
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polar front
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what is produced by the alternating influence of the ITCZ for part of the year and the STH for the other part?
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tropical wet/dry or savanna climate
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hadley cell shifts with the?
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direct rays of the sun
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what is influenced by STH's all year?
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subtropical desert climates
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what is influenced by ITCZ all year?
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rainforrest climates
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what creates the hadley cell circulation?
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subtropical highs
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why are subtropical highs strongest in the summer over oceans?
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bermuda high and pacific or hawaiian high
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subtropical highs are?
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semi-permanent
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centripetal force is what type of force?
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combining force
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what is a line of constant pressure just like isotherm but eith pressure?
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isobar
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barometric pressure is based on?
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the standard atmospheric pressure at sea level (1012 mb)
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what is unit force per unit area?
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pressure
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what forces air to move?
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differences in pressure
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wind transports?
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atmospheric properties
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what is moving air caused by the unequal heating of the earths surface and atmosphere?
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wind
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what are equal values of temperatures?
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isotherms
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the LAG diagram only shows?
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postive radiation
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what is an example of absorbed energy?
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sweat
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what warms the surrounding envornment?
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released energy
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earth stores?
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sensible heat
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rossby waves set up areas of?
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convergence and divergence
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what is the imaginary cell between hadley and polar cells and not really a circulation cell?
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ferrel cells
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what is an example of a isoline?
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isotherm
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the warmest time of the day occurs with?
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maximum energy absorption not input
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the purpose of earths general atmospheric circulation are set up by?
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rotation
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the annual temperature trend lays behind radiation by?
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1 month or so over land and 2-3 months over water
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what moves the wind?
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the pressure gradient force
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the coriolis effect deflects moving air to the left in what hemisphere?
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southern hemisphere
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the coriolis effect is greatest at the?
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poles
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why is there no coriolis effect at the equator?
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near surface winds
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what are the two major jet streams over the U.S?
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polar front jet and subtropical jet
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when is there a shift toward the northern hemisphere?
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july
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when is there a shift in the southern hemisphere?
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january
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properties of pressure gradient-flow always goe from?
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high pressure to low pressure at right angles to the isobars
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the coriolis effect deflects moving air to the right in what hemisphere?
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northern hemisphere
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what slows down wind and weakens the coriolis effect?
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friction
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cyclones have?
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low pressure
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anticyclones have?
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high pressure
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what is a corridor of very fast winds produced by steep pressure gradients?
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jet stream
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warming?
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cools the surronding enviorment
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