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Key Terms - Ch 4
key terms for ch 4
26
Geography
Undergraduate 2
02/25/2014

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Term
solar energy
Definition
energy from the sun
Term
electromagnetic radiation
Definition
radiant energy; flow of energy in form of an electromagnetic wave
Term
heat
Definition
thermal energy
Term
sensible heat
Definition
heat compared to the temperature of the human body
Term
transformation
Definition
energy changing from one form to another
Term
absorption
Definition
electromagnetic radiation becomes thermal energy
Term
radiation
Definition
thermal energy becomes electromagnetic radiation
Term
transmission
Definition
(radiation) energy flows through an object
Term
conduction
Definition
heat transfer through contact
Term
convection
Definition
heat transfer due to density differences (rising air)
Term
adiabatic cooling and warming
Definition
air rising or falling due to pressure difference without a loss in energy (PV=nRT) (hot air rises then cools)
Term
latent heat
Definition
energy stored or released during a phase change (no temperature change)
Term
solar spectrum
Definition
UV (short), visible, infrared (long)
Term
solar shortwave
Definition
insolation
Term
terrestrial longwave
Definition
radiation that usually gets turned into heat
Term
atmosphere transparency
Definition
degree to which you can see through the atmosphere (depends on absorption rate of energy waves)
Term
greenhouse effect
Definition
warming of the lower troposphere because shortwave energy enters, transforms into long wave and cannot escape again
Term
global energy budget
Definition
The balance between the Earth's incoming and outgoing energy.
Term
scattering
Definition
a change in direction of light waves (blue color)
Term
absorption
Definition
an object assimilates energy from electromagnetic waves (direct heating)
Term
reflection
Definition
object repels electromagnetic waves with no change to object or waves (clouds)
Term
shortwave: albedo
Definition
solar energy reflected off atmosphere into space
Term
positive radation balance: heating
Definition
more energy in than out
Term
negative radation balance: cooling
Definition
more energy out than in
Term
maritime effect
Definition
more moderate temps near ocean (specific heating of water)
Term
continental effect
Definition
more extreme temperature range
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