GLOBAL WARMING ANDTHE GREENHOUSE EFFECT MS. KOPCHICK’S EARTH SCIENCE CLASS
What is the difference between Global Warming and the Greenhouse Effect?Global warming refers to a rise in the temperature of the surface of the earth An increase in the concentration of greenhouse gases leads to an increase in the magnitude of thegreenhouse effect. (Called enhanced greenhouse effect)
The Greenhouse Effect is a GOOD THING!GREENHOUSE GASES REGULATE OUR CLIMATE BY TRAPPING HEAT AND HOLDING IT IN A KIND OF WARM-AIR BLANKET THAT SURROUNDS THE PLANET. WITHOUT IT, OUR AVERAGETEMPERATURE WOULD BE COLDER BY 54 DEGREES FAHRENHEIT WAAAAAAAAAAAAAAY TO COLD TO SUSTAIN OUR CURRENT ECOSYSTEM!
The “Enhanced” Greenhouse Effect THE PROBLEM WITH THE GREENHOUSE EFFECT IS WHEN HUMAN ACTIVITIES DISTORT ANDACCELERATE THE NATURAL PROCESS BY CREATING MORE GREENHOUSE GASES IN THE ATMOSPHERE
Greenhouse Gases • CARBON DIOXIDE (CO2)– Source: Fossil fuel burning, deforestationh Anthropogenic increase: 30%h Average atmospheric residence time: 500 years h METHANE (CH4)– Source: Rice cultivation, cattle & sheep ranching, decay from landfills, miningh Anthropogenic increase: 145%h Average atmospheric residence time: 7-10 years
Greenhouse Gases h NITROUS OXIDE (N2O)– Source: Industry and agriculture (fertilizers)h Anthropogenic increase: 15%h Average atmospheric residence time: 140-190 years WATER VAPOR (H2O) THE MOST IMPORTANT GREENHOUSE GAS!! SOURCES: EVAPORATION ANTHROPOGENIC INCREASE: 35 %
More greenhouse gases meansmore heat trapped which increases the Earth’s temperatureBURNING NATURAL GAS, COAL, OIL RAISES THE LEVEL OF CO2 IN THE ATMOSPHERESOME FARMING PRACTICES AND LAND-USE CHANGES INCREASES THE LEVELS OF METHANE AND NITROUS OXIDE MANY FACTORIES PRODUCE LONG LASTING INDUSTRIAL GASES THAT DO NOT OCCUR NATURALLY AND THOSE GASES ENHANCE THE GREENHOUSE EFFECT
Even more ways these gases are added to the atmosphere! DEFORESTATION: TREES USE CO2 AND GIVE OFF O2 IN WHICH HELPS TO CREATE THE OPTIMAL BALANCE OF GASES IN THE ATMOSPHERE. AS MORE FORESTS ARELOGGED FOR TIMBER OR CUT DOWN TO MAKE WAY FORFARMING, THERE ARE FEWER TREES TO PERFORM THIS CRITICAL FUNCTION. IN ADDITION WHEN THIS WOOD IS BURNED IT PRODUCES EVEN MORE CO2 IN THE ATMOSPHERE.
Population Growth AS MORE PEOPLE USE FOSSIL FUELS FOR HEAT, TRANSPORTATION AND INDUSTRY, THE LEVEL OF GREENHOUSE GASES CONTINUE TO INCREASE. ASMORE FARMING OCCURS TO FEED MILLIONS OF NEW PEOPLE, MORE GREENHOUSE GASES ENTER THE ATMOSPHERE
How do scientists measure theincrease of greenhouse gases? ICE
Effects of Global Warming due to the unbalance of greenhouse gasesIncreased Temperature Rising Sea Level
Effects of Global Warming due to the unbalance of greenhouse gases Changes in water supply;Habitat Damage and contamination of fresh Species Extinction water
Effects of Global Warming due to the unbalance of greenhouse gases More severe storms; Droughts, changes inhurricanes and floods weather patterns
Some Proof of Global WarmingPortage Glacier Portage GlacierAlaska then…. Alaska now….
Some Proof of Global WarmingColorado River, Az Colorado River, Az June 2002 December 2003
What can we do to help reduce greenhouse gas emissions?
Educate and Use!! CompactFuel Efficient Cars Fluorescent
Today you can…. TURN OFF YOUR COMPUTER OR THE TV WHEN YOU’RE NOT USING IT.TAKE SHORTER SHOWERS. HEATING WATER USES ENERGY. KEEP ROOMS COOL BY CLOSING THE BLINDS, SHADES, OR CURTAINS. TURN OFF THE LIGHTS WHEN YOU LEAVE A ROOM. USE COMPACT FLUORESCENT BULBS