Ch16_Lecture - Today's Epitome Roll Lab #2 is due...

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05/12/09 GEOL1401/tob 1 Today’s Epitome Roll Lab #2 is due Questions? Height vs foot length Ch 1 Review ο List the sciences traditionally included in Earth science. ο Describe the Nebular hypothesis. ο Describe Earth's "spheres.” ο Discuss Earth system science and Earth as a system. ο Summarize some of the relationships between people and the natural environment. ο Describe the nature of scientific inquiry Some discussion of Chapter 16 Next Time
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05/12/09 GEOL1401/tob 2 GEOL 1401 – Chapter 16 The Atmosphere: Composition, Structure, and Temperature Dr. Thomas O. Bush Roberts 116 thomasobush@comcast.net 214-333 -5318
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05/12/09 GEOL1401/tob 3 Weather and Climate Weather over a short period of time Forecasted over a few days Constantly changing US has the greatest variety of weather Severe weather more frequent and more damaging Cannot predict, just what is most likely Climate over a long period of time Generalized, composite of weather Sum of all statistical weather information for a region
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05/12/09 GEOL1401/tob 4 Elements of Weather and climate interrelated properties measured regularly To describe and predict 1. Temperature 2. Humidity 3. Cloudiness 4. Precipitation 5. Air Pressure 6. Winds speed and direction
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05/12/09 GEOL1401/tob 5 Major components of Clean, Dry Air – Mixture of discrete gases Nitrogen (N) – 78% Plants use Oxygen (O 2 ) – 21% Animals use Argon and other gases Carbon dioxide (CO 2 ) - 0.036% absorbs heat energy from Earth
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05/12/09 GEOL1401/tob 6 When not clean and dry - variable Water vapor Up to about 4% of the air's volume Forms clouds and precipitation Absorbs heat energy from Earth Aerosols Tiny solid and liquid particles Water vapor can condense on solids Reflect sunlight Help color sunrise and sunset Ozone Three atoms of oxygen (O 3 ) Distribution not uniform Concentrated between 10 to 50 kilometers above the surface Absorbs harmful UV radiation Keeps planet habitable
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05/12/09 GEOL1401/tob 7 Height and Structure of the atmosphere Where does it start? Where does it end? Characterized by Pressure changes Temperature changes Temperature is a measure of the Kinetic energy of the molecules Not how hot or cold something is
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05/12/09 GEOL1401/tob 8 Changes in Atmospheric pressure with height Pressure is the weight of the air above Average sea level pressure Slightly more than 1000 millibars About 14.7 pounds per square inch Pressure decreases with
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This note was uploaded on 04/15/2008 for the course GEOL 1401 taught by Professor Thomasbush during the Spring '08 term at Dallas Baptist.

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Ch16_Lecture - Today's Epitome Roll Lab #2 is due...

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