Chapter01c

# Chapter01c - The Earth and Its Atmosphere: 1. Vertical...

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The Earth and Its Atmosphere: 1. Vertical structure 2. Weather and climate

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Mass,Weight, Density, Pressure Mass   M property of matter, SI unit: kg.  Other units:  1kg=1000 g,   1 lb=450 g Weight             :  a force, has a magnitude and direction (vector). weight = mass x gravity             g(Earth)= 9.78 m/s 2 SI unit: kg m/s 2  -> N                 g(Mars)= 3.7 m/s 2             Density  ρ mass per unit volume:   density = mass / volume SI unit: kg/m 3 ,   Other: g/cm 3 Pressure   p p= force/area SI units: Pa=N/m 2 ,   Other:  1bar=100 Pa W
Atmospheric pressure and air density Atmospheric pressure and density decrease with altitude exponentially!!!

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RECAP Atmospheric composition: Permanent gases: N 2 , O 2 , Ar, Xe, Ne, H 2 , He Variable gases: CO 2 ,H 2 O,O 3 ,CH 4 Greenhouse gases : H 2 O, CO 2 , NO,CH 4 Mass. Weight. Density. Pressure
Mid-chapter brief review(s) The earth’s atmosphere is a mixture of many gases. In a volume of dry air near the surface,  nitrogen (N 2 ) occupies about 78 percent and oxygen (O 2 ) about 21 percent. Water vapor, which normally occupies less than 4 percent in a volume of air near the surface,

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## This note was uploaded on 01/26/2012 for the course MET 1010 taught by Professor Matchev during the Spring '08 term at University of Florida.

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Chapter01c - The Earth and Its Atmosphere: 1. Vertical...

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