Global Warming and the Greenhouse effect

• causes natural and anthropocentric ( human caused ) 
• the atmosphere is the gaseous envelope that surrounds the earth
• atmosphere composition 
• dust 
• major gasses : N (78%) and O (21%) 
• Minor gases: Ar (0.93%), CO2, CH$, etc. 
• ozone (O3) 
• water vapor  
• increase in "greenhouse" gases, which in turn traps heat 
• more greenhouse gases = more warming 
• greenhouse gases are: carbon dioxide (co2), nitrous oxide ( n2o), methane (ch4), cfc's water vapor ( clouds) 
• anthropogenic enhancement 
• industrialization and consumerism; burning of fossil fuels 
• greenhouse gasses in the Earth's atmosphere absorb thermal energy ( infra-red) radiated from Earth's surface
• how it works 
• co2 occurs naturally in low concentrations but has a big effect 
• how co2 is added to the atmosphere 
• exchange between atmosphere and seawater 
• biological respiration 
• burning of fossil fuels 
• volcanism (volcanoes ie mammoth mountain)  
• fires ( burning tress) 
• how co2 is removed form atmosphere 
• exchange between atmosphere and seawater 
• photosynthesis 
• formation of carbonate rocks ( limestone) in oceans 
• fossil fuels and fires are instantaneous greenhouse gasses 
• consequences of climate warming 
• glaciers/ sea ice 
• sea level 
• species migration 
• catastrophic weather events 
• shut-down of the ocean conveyor belt ( worst possible thing to happen) 
•  what factors effect sea level 
• increase in glaciers = fall in sea level 
• less glaciers - rise in sea level 
• slower seafloor spreading - drop in sea level 
• faster spreading - rise in sea level 
• ocean cools, water contracts - drop in sea level 
• warming oceans - rise in sea level