EARTHSS 15 Lecture Notes - Lecture 3: Fluid Parcel, Negative Temperature, Advection
6 May 2018
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ESS15 Lec #4
Units to measure energy & its changes
Energy: Joules (J,KJ,MJ)
1KJ=1000J
1MJ=1,000,000J
Rate of energy transfer: Watts(W,kW,MW)
1W=1J/s (energy transfer per unit time)
C around 4100 J/Kg/K for liquid water
C around 800 J/kg/K for dry soil
C around 1005 J/kg/K for dry air
Ocean is the most component that easy to warm up or cool down
Units of Air temperature:
Fahrenheit
Celsius =(F-32)/1.8
Kelvin =a SI unit= K=C+273
1K=1C 大于 1F
Absolute Zero Temperature= -273 degree C
Add(remove) heat to (from) the air parcel (diabatic processes)
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Ocean is the most component that easy to warm up or cool down. Add(remove) heat to (from) the air parcel (diabatic processes) (1) conduction : requires touching. The process of heat transfers from molecule and (2) convection : hot air rises. Heat transfer by mass motion of a fluid (such as air or water that can move) Produced when the heated fluid moves away from the heat. 30 degree south-30 degree noeth has less temperature change winte storm tries to move the heat from equator to north pole. (cid:2374) (4) radiation : exchanging heat with space, transfer from earth"s outer space (5) latent heating : changing the phase of water. Hurricane also is one of the ways to transfer heats, water from ocean. It releases the energy that can use in the whol year. We have water vapour to help us to transfer the heat easily, if not, we need to cool down between at least 300 times.
