Teacher: Samarripa GLOBAL WARMING. The Global Warming & The Greenhouse Effect.
Global Warming
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Transcript of Global Warming
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GLOBAL WARMINGGLOBAL WARMING
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Increase Increase in the average measured temperature of the Earth's surface air and in the average measured temperature of the Earth's surface air and oceans oceans
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GLOBAL WARMING is the increase in the average measured temperature of the Earth’s Near-surface air and oceans since the mid-twentieth century and its projected continuation
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How Global Warming Works
Fossil fuels (coal, oil, natural gas)
Carbon Dioxide (CO2)
Greenhouse gases
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Green house effect Changes in solar luminosity Volcanic eruptions variation of Earth’s orbit
around the Sun
FACTORS RESPONSIBLE FOR EARTH’SCLIMATE CHANGES:
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It is the process by which absorption and emission of infrared radiation by atmospheric gases takes place which warm a planet’s lower atmosphere and surface.
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Water vapour Carbondioxide (CO2) Methane (CH4) Ozone (O3) Nitrous oxide (N2O) Cloro floro carbons(CFC’s)
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•Water vapour 36-70%•Carbondioxide 9-26%•Methane 4-9%•Ozone 3-7%
Composition of green house gases present in the atmosphere causing global warming
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Global Atmospheric Concentration of CO2
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Atmospheric concentrations of CO2 and CH4 have increased By 31% and 149% respectively since the beginning of industrial revolution In the mid-1700’s.
Mean warming effect of green house gases is about 33 degrees centigrade’s more.
Actual surface temperature -15 degrees.
Present surface temperature 18 degrees.
Further rise of 1.1—6.4degrees C during 21stcen.
FEW FACTS:
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Atmospheric Concentration of CO2
Present concentration: 385ppm by volume
Expected concentration by the year 2100:541-970ppm by volume
(If the usage of fossil fuels continues like the present trend)
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CAUSES OF GLOBAL
WARMING
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Pollution from coal, natural gas, and oil
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CO2 from airplanes & vehicles
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POPULATION POPULATION INCREASEINCREASE
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DEFORESTATIODEFORESTATIONN
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GLACIAL RETREAT
ARCTIC SHRINKAGE
EXTREME WHETHER
RISE IN SEA LEVEL
INCREASE IN FLOODS & DROUGHTS
CHANGES IN AGRICULTURAL YIELDS
SPECIES EXTINCTIONS
INCREASE IN THE RANGE OF DISEASE CAUSING VECTORS
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Melting of glaciers
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Polar Bear Extinction
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Warmer waters and more hurricanes
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Increased probability and intensity of droughts and heat waves
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Increased Temperature
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MeltingPolar ice caps
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ANTARCTICA – losing ice ANTARCTICA – losing ice faster..!!!!!! faster..!!!!!!
BEFORE NOW
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PORTAGE GLACIER
1914 2004
Alaska
Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
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COLORADO RIVER
Arizona
June 2002 Dec 2003
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Major CONSEQUENCE of global warming is………….
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At some places, it
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At others……
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SOMEWHERE it’s tooo…….ooo
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HOT
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WHEREAS At others tooo…..
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COLD
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Its all because of
Its all because of
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GLOBAL WARMING
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Is it impossible to Is it impossible to solve this problemsolve this problem
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DON’T CRY
DON’T CRY
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It’s NOT too LATE
ACT NOW!!!!
It’s NOT too LATE
ACT NOW!!!!
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Turn off your computer or the Turn off your computer or the TV when you’re not using it.TV when you’re not using it.
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Turn off the lights when you leave a room. Turn off the lights when you leave a room.
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Dress lightly when it’s hot instead Dress lightly when it’s hot instead of turning up the air of turning up the air conditioning.conditioning.
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Unplug unused electronicsUnplug unused electronics
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Plant trees. Plant trees.
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Recycle.Recycle.
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Drive LESS, drive SMART
Use a Use a bicyclebicycle or or busbus
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Wind Power
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Solar Power
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Fuel efficient cars
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Think GloballyThink Globally
Act Locally