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Vertstructofatmosph - Vertical Structure of the Atmosphere...

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Vertical Structure of the Atmosphere
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Forecast Challenge Available on WebVista Today Submission due by this Friday 29 th at 5 pm
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Be sure to complete the course survey on WebVista
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Weather Briefing
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Recap
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Weather – Climate – Definitions The condition of the atmosphere at a given time & location with respect to temperature, pressure, humidity, and wind. Historical record of average daily & seasonal weather events.
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Pictorial View of the Atmosphere
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ATMS 100 8 Atmospheric Composition See Table 1.1 (p. 3) Nitrogen Oxygen Trace Gases Water vapor Carbon dioxide – Ozone – Methane Nitrous oxide
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Our Present Atmosphere Current atmospheric composition is only 250 million years old Big “little” changes now going on – GH gases
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How do we describe atmospheric conditions? Pressure (p) Temperature (T) Moisture (water vapor) - humidity • Wind
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Pressure (p) • Definition: Units: millibars (mb) Mercury Barometer Force exerted on Earth's surface by air molecules Always decreases with height Varies more in the vertical than the horizontal Measured with a barometer
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Pressure Range of values at sea level Variation with height
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Temperature (T) • Definition: • Units: Average kinetic energy of air molecules Usually decreases with height Large variations in the horizontal and vertical °F and °C
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14 Temperature (T) Range of values at sea level Variation with height
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Vertical Structure of the Atmosphere Can be divided into a series of layers Most often divided by temperature changes Also can be divided based on chemical composition and the processes that occur
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Measured by its temperature, density, and pressure What is temperature?
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