RNRTest2

RNRTest2 - Atmosphere 10:34:00 ← Atmosphere • Global...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Atmosphere 21/09/2009 10:34:00 ← Atmosphere • Global common property resource • Exploitation without property rights – resource degradation • Troposphere – 12 km (1/2) of the atmosphere temperature decrease well mixed weather • Stratosphere – 12-50 km, temperature increasing, zone layer at 25 km • Mesosphere – 50-80 km, coldest -90C, meteor destruction • Thermosphere – 80-500 km, thin air, sensitive to solar radiation, ionosphere, aurora borealis • Exosphere – 500-80,000 km, thin, loss of atoms and molecules, little impact to the planet ← ← Stratosphere • Contains the ozone layer critically important to life on the planet • Ozone is three atoms of oxygen; bonds aren’t strong • Oxygen get hits by uv, and then 3 join together, then break apart in 15-20 minutes • Thickness of ozone layer over Antarctica has been thinning and a lot of radiation has been hitting • One of major causes of ozone thinning is CFCs (chloroflurocarbons (aerosols)) • CFCs are released into atmosphere and hit with uv, chlorine breaks free and breaks apart ozone, creating oxygen and creating more chlorine to break apart ozone ← ← Troposphere • Hydrologic cycle cycle of water around the planet o Not a lot of chemical, geological, or biological transformation o Most evaporation occurs over the ocean o Lots of water in ice o This process is critically important to feeding the terrestrial systems plants and cities (depend on snow melts for water to fill up reservoirs) o With global warming, air current patterns are changing which means water isn’t dropping onto same terrestrial systems • Air pollution o Gases, liquids, solids that can harm organisms, habitats, ecosystems o Often concentrated in urban areas o Anthropogenic sources o Primary pollutants generated by human activities and released into environment, such as: Particulate matter – toxic, carcinogenic; small particles (PM- 2.5) very problematic Nitrogen oxides (NO,NO2, N2O) – lung problems, inhibited plant growth Sulfur oxides (SO2, SO3) - odor problems Carbon oxides (CO, CO2) – CO poisonous, blood deoxygen; CO2, major greenhouse gas Hydrocarbons (CH4, C6H6) – respiratory problems, carcinogens, smog, greenhouse gases Ozone – smog, health , plant suppression; fine 25 km above surface, but bad at surface Numerous other hazardous air pollutants (HAPS) regulated by the Clean Air Act amendment 1990 o Secondary pollutants React instantly with water to form acidic substances like H2SO4 and HNO3 Falls back to ground as acid rain kills forests, ruins limestone...
View Full Document

This note was uploaded on 09/13/2011 for the course RNR 1001 taught by Professor W.kelso during the Spring '08 term at LSU.

Page1 / 38

RNRTest2 - Atmosphere 10:34:00 ← Atmosphere • Global...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online