ch01 - Jon Ahlquist 9/14/2006 Chapter 1:The Earth and Its...

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Jon Ahlquist 9/14/2006 MET1010 Intro to the Atmosphere 1 Chapter 1:The Earth and Its Atmosphere ± Overview of the Earth’s atmosphere ² The solar system ² ² The early atmosphere ± Vertical structure of the atmosphere ² A brief look at air pressure and air density ² Layers of the atmosphere ² The radiosonde (weather balloon) ± Weather and climate ² Meteorology- A brief history ² Satellite’s view of the weather ² Solar System (p. 2, figure not to scale) ± 1st 4 planets are “small” and rocky: Mercury (looks like Earth’s moon), Venus (covered with clouds; surface is hundreds of degrees hot), Earth (93 million miles from Sun, 8 min for light to travel to Earth), Mars ± Asteroid belt (not shown in figure) ± 4 “gas giants”: Jupiter and Saturn, Uranus , Neptune (1 st letters of last 3 spell SUN) ± Pluto: dwarf planet; rock, water ice, frozen methane Remembering Order of Planets ± You can use the following sentence to help you remember the order of the “nine” planets: My very educated mother just showed us nine planets. ± Each word of the preceding sentence begins with the letter of the next planet as you go out from the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto ± As of August, 2006, Pluto was reclassified as one of several “dwarf planets” because a number of other small similar bodies have been identified beyond Neptune. Atmospheric Composition (pp. 2-8) ± ± Hydrogen almost certainly primary component of Earth’s early atmosphere, but gravity on Earth & other inner planets not strong enough to prevent escape of hydrogen to space. ± Earth’s current atmosphere probably developed from volcanic gases (outgassing from volcanoes) ± Earth’s air: roughly 80% nitrogen (N 2 ) and 20% oxygen (O 2 ). ± Next most abundant gases are water vapor and argon (type of inert gas), each about 1% of atmosphere. ± Other gases present in minute amounts (much less than 1%: trace gases). Some are “greenhouse” gases which influence the Earth’s temperature. Greenhouse gases (pp. 5-6; more in chap 2)
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This note was uploaded on 07/21/2011 for the course MET 1010 taught by Professor Staff during the Fall '08 term at FSU.

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ch01 - Jon Ahlquist 9/14/2006 Chapter 1:The Earth and Its...

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