rnr 1001 test 2 - Atmosphere Global common property...

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Atmosphere o Global common property resource o Exploitation without property rights – resource degradation Use as much as you can because it belongs to no one o Used and impacted by everything on the planet o Troposphere ½ of the atmosphere Where weather happens Temperature decrease Hydrologic cycle Water circulation Air pollution Gases, liquids, solids that can harm organisms, habitats, ecosystems Often concentrated in urban areas Anthropogenic sources o Human caused o Things that people are doing – anthropogenic Primary pollutants o Directly the result of some kind of combustion or something we pour on the ground that evaporates o Particulate matter- toxic, carcinogenic; small particles, very problematic Because they don’t get stuck in your nose they get all the way to the lungs etc. o Nitrogen oxides – lung problems, inhibited plant growth o Sulfur oxides – odor problems o Carbon oxides - CO poisonous, blood deoxygenation, CO2, major greenhouse gas
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o Hydrocarbons – respiratory problems, carcinogens, smog, greenhouse gasses o Ozone – smog, health, plant suppression Good when its in the atmosphere But not really good where it’s close to the ground o Numerous other Hazardous Air Pollutants (HAPS) regulated by the Clean Air Act amendments (from 1990) Primary pollutants make their way to the troposphere become secondary pollutants Acid rain Could be dry acid rain (particles float down) Leeching a lot nutrients from the soil Eye damage, vison problems, repiratory distorders, cardiovascular problems Ecosystem damage Reduced nutrient cycling Tropic web alteration Lowered primary production Animal plant extinction Climate Change o Stratosphere Temperature increases Ozone layer 3 oxygen molecules stuck together Life span of maybe around 10-20 minutes Critical in filtering out light Deteriorate because of chlorofluorocarbons (aerosols)
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o Good because didn’t really react with anything else o Were liberating with cfcs as well o Chlorine atom has around 1-2 years o Probably breaks about 100k ozone molecules o Mesosphere Coldest layer Meteor destruction o Thermosphere Thin air, sensity to solar radiation Ionosphere A lot of ions charged particles that are floating around Where the northern lights happen o Exosphere Thin, loss of atoms and molecules to space 9-29-08 Global Warming o Ecosystems Reduced resilience due to climate, disturbance (wildfire, insects) and global changes in land-use, pollution, fragmentation, exploitation Terrestrial carbon sequestration peaking mid 21 st century See as much terrestrial vegetation as much as we’re going to see Increase extinction risk for about 20-30% of known plants and animals Plants don’t move very fast Some animals don’t move that much
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But sometimes animals maybe move into a new place and impact other plants and animals With temperature > 1.5 -2 C, major changes in ecosystem structure and function
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