GEOG 1114 1st Edition Lecture 7 Outline of Last Lecture Introduction to the Atmosphere Roles and Characteristics of the Atmosphere Characteristics Composition Atmospheric Particulates Aerosols Vertical Structure Pressure Composition of the Atmosphere Atmospheric Pressure Air Pressure Outline of Current Lecture Atmospheric Composition based on gas distribution Human Induced Atmospheric change Weather and Climate Solar energy Insolation and temperature Electromagnetic Radiation EMR Electromagnetic Spectrum Current Lecture Atmospheric Composition based on Gas distribution Homosphere uniform vertical distribution of gasses throughout the lowest 50 miles of the atmosphere Heterosphere Layer above the homosphere where gasses are layered in accordance their molecular masses These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Nitrogen below with oxygen helium hydrogen above Ozone Layer Ozonosphere found between 15 and 48 km Composed of 3 molecules Absorbs UV light and filters these rays to protect life Hole found in caused by CFC s Montreal Protocol 84 International Treaty phasing out CFC s Problem slowed Ionosphere deep layer of electrically charged molecules in upper mesosphere and lower thermosphere Aids long distance communication and known for is auroral displays Human Induced Atmospheric Change There are three major impacts 1 Depletion of the Ozone Layer this lead to certain regulations on CFC s that were used in aerosols and air conditioning units 2 Air Pollution Acid rain and the Asian Brown Cloud 3 Climate Change Greenhouse gasses CO2 Methane NO2 039 050 Weather and Climate Weather is a daily condition Climate is long term averages and patterns and what to expect 4 Major Elements of Weather and Climate 1 Temperature Changes daily and seasonally because we tilt and revolve 2 Pressure Change of pressure gradient creates wind 3 Moisture Dynamics in the atmosphere creates changes in temperature creating changes in moisture 4 Wind Solar Energy Insolation and Temperature Solar Energy Electromagnetic Radiation EMR Major source of energy for our planet driving force of the atmosphere Sun giant thermonuclear reactor producing energy by fusion Wave Form Travels in Electromagnetic waves speed of light Waves are classified by wavelength and frequency Wavelengths measured in micrometers m Incoming solar radiation insolation shortwave radiation fairly constant Outgoing terrestrial radiation longwave reflected thermal infrared variable Travel with a loss of energy Electromagnetic Spectrum Insolation characterized by wavelengths makes up the EM spectrum Portions of the Spectrum Incoming solar radiation most comes in the form of visible light constant Facts about Visible Light Spectrum LCD Liquid crystal display shoot liquid and the crystals refract the light giving you the color Infrared light cannot see it but you can use it in terms of film WW2 plants reflect differently when seen through infrared military can make that distinction between camouflage and vegetation using infrared imaging FM radio came in the 70s with rock and roll Incandescent fluorescent Electricity 1893 Edison gave us incandescence Tesla was fluorescent Now we have halogen and Led lights Led are better on your eyes We are banning incandescent lights and moving to fluorescent Australia has banned them all together
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