chapter6gh - Chapter 6: Air Pressure Measuring air pressure...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Chapter 6: Air Pressure Measuring air pressure Variations due to temperature and water vapor Development of pressure systems Generation of winds Understanding Air Pressure : -pressure exerted by the weight of air above -force exerted against a surface by the continuous collision of gas molecules -sea level pressure (slp) = 14.7 lbs/in 2 , 1kg/cm 2 Measuring Air Pressure : Newtons: unit of force (F = ma, kg m/s 2 ) slp: 101,325 Newtons 100 Newtons = 1 milibar (slp = 1013.25 mb) Inches of Mercury: mercury barometer slp = 29.92 in of mercury Measuring Air Pressure : aneroid barometer: metal chamber changes shape based on pressure, changes lever locations Measuring Air Pressure : Rising pressure: fair and dry Falling pressure: rainy, wet, stormy
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Measuring Air Pressure : barograph: continuous log of aneroid barometer measurements Digital barographs Pressure Changes With Altitude : Density decreases w/ altitude Weight of overlying column of air decreases with altitude Pressure decreases w/ altitude halves ~ every 5 km Pressure Altimeter
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/18/2011 for the course EARTH SCIE 130 taught by Professor Frankbuonaiuto during the Fall '09 term at CUNY Hunter.

Page1 / 7

chapter6gh - Chapter 6: Air Pressure Measuring air pressure...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online