2_geog2013_atmosphereW2017

2_geog2013_atmosphereW2017 - GEOG2013 Weather and Water...

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GEOG2013 Weather and Water Lecture 2. Composition & Behaviour of the Atmosphere Quick review of the structure of the atmosphere Chemical composition of the atmosphere Readings: Ross (2013) Ch. 2 Dec 2016 (Humphreys) 1
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2 Stull (2015) At sea level Temperature: 15ºC Pressure: 101.325 kPa Density: 1.23kg/m 3
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3 1. How much does the standard atmosphere weigh per unit area (kg m -2 )? Convert pressure in kPa to kg m -2 . Some hints: Pa = N m -2 where N = kg m s -2 ; standard acceleration due to gravity = 9.81 m s -2 2. What is the weight of the full atmosphere? Hints: Earth’s surface area = 5.101 x 10 8 km 2
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4 http://www.srh.noaa.gov/jet stream/atmos/layers.htm Earth’s Atmosphere … Importance to life? 50 % of air molecules below 5.5 km 99 % of air molecules below 30 km
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5 The Chemical Composition of Air Ross (2013)
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6 Residence Time = Reservoir Size Inflow or Outflow Rate Ross (2013)
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7 Ross (2013)
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8 Figure 2.8: Compositional layers of the atmosphere (Ross, 2013) http://www.srh.noaa.gov/j etstream/atmos/layers.htm
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9 Atmospheric gas measurements at Mer Bleue
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