GEOL150_week2_2_Radiation

GEOL150_week2_2_Radiation - Week 2, lecture 2 Energy...

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GEOl50: Climate Change University of Southern California, Los Angeles Week 2, lecture 2 Energy Transfer & Radiation
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Thermal energy and heat Heat is the process of transferring thermal energy from one body or system due to thermal contact Heat is a verb more than a noun . Refers to an exchange quantity, but it doesn ʼ t make sense to speak of the heat of a water glass (you would speak of temperature). Heat can also be deFned as an energy transfer to a body in any other way than due to work performed on the body (action of an external force, e.g. Baseball) Temperature is the quantity that measures thermal energy (the latter always increases with it)
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The three temperature scales Kelvin Absolute, logical Celsius Relative, logical Fahrenheit Relative, illogical
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(aka Thermal Mass) Usually defned per unit mass : “specifc heat” C p Defned as the amount oF energy necessary to change 1 kg oF matter by 1 degree (Celsius or Kelvin) Good to know on Earth: Cp (Sea Water) : 3850 J/(kg C) Cp (Dry Air) : 1005 J/(kg C) It takes 4 times as much energy to warm up water than air ! This will explain the great thermal inertia of oceans
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GEOL150_week2_2_Radiation - Week 2, lecture 2 Energy...

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