global-warming-final pptfo isap
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Prepared by Satyabodha. N. Vyasamudra
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INCREASING GLOBAL TEMPERATUREINCREASING GLOBAL TEMPERATURE
WHAT IS GLOBAL WARMINGWHAT IS GLOBAL WARMING??
Global warming is the increase in the
average temperature of the Earth'ssurfaceSince long time.
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CAUSE OF GLOBAL WARMINGCAUSE OF GLOBAL WARMING
Increase intemperature from 100 years. Solar variations and volcanoes have small effectcompared to
industrial ones.
Surface temperature will rise further 1.1 to 6.4 C.
Sea levels to rise.
Extreme weather
Changes inagricultural yields
Modifications of trade routes Glacier retreat
Species extinctions
Increases inthe ranges of disease vectors.
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HumanPollutionAir, water, land, chemical , etc.
Greenhousegases (greenhouse effect) Fossil fuels : oil, naturalgas, andcoal.
Some predictions for localchanges include increasing
hot summers and intense thunderstorms. The United States was responsible for 20 percent of
theglobalgreenhousegases emitted in1997.
Most of the worlds emissions are attributed to theUnited States large scale fuels invehicles and
factories.
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EFFECTS OF GLOBAL WARMINGOF GLOBAL WARMING
GreenhouseEffectGreenhouseEffect Humanactivity
Warmingeffect of about 33 C without whichEarth
would be uninhabitable Greenhousegases are water vapour, carbondioxide,
methane and ozone.
CO2
and methane have increased by 31% and 149%respectively.
75% increase inCO2is due to burningof fossil fuel
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Ascompared to Northernhemisphere,Ascompared to Northernhemisphere,
ice trends inSouthernhemisphere haveice trends inSouthernhemisphere haveheated less because land is more inheated less because land is more in
Northernhemisphere ascompared toNorthernhemisphere ascompared to
southernhemisphere. Because landsouthernhemisphere. Because landtemperature is morecompared to thattemperature is morecompared to that
of water and all theglobal activitiesof water and all theglobal activities
are more inNorthernhemisphereare more inNorthernhemisphereincludingchemical, factories, vehicularincludingchemical, factories, vehicular
smoke etc.smoke etc.
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Northern hemisphereNorthern hemisphereice trendsice trends
Southern hemisphereSouthern hemisphereice trendsice trends
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RECENT UPDATESRECENT UPDATES
Global temperature increase by 0.75%.
NorthernHemisphere has more land thanSouthern
Hemisphere so it warms faster.
2005 was the second warmest year, behind 1998.
Humaninfluence onclimate began8,000 yrs ago with
start of forestclearingto provide land for agriculture.
5,000 years ago with the start of Asianrice irrigation.
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PREPRE HUMAN CLIMATE VARIATIONHUMAN CLIMATE VARIATION Earth has experienced warmingandcoolingmany times inthe past.
A rapid buildup ofgreenhousegases amplified warminginearly Jurassicperiod (180 millionyrs ago),
CO2 levels dropped back tonormal over roughly thenext 150,000 years.
CLIMATIC MODELS
Scientists have studied aboutclimate models
Models based onfluid dynamics, radioactive transfer and other
processes
Atmosphericmodel includes oceanand land Models also include treatments ofchemical and biological
IPCC anticipates a warmingof 1.1 C to 6.4 C by the end of the 21st
century, relative to 19801999.
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ATTRIBUTED& EXPECTEDATTRIBUTED& EXPECTED
ENVIRONMENTALEFFECTSENVIRONMENTALEFFECTS Glacial retreat
Arcticshrinkage
Worldwide sea level rise
Floods and drought Extreme weather events.
Changes inagricultural yields
Reductionof Ozone
Additionofnew trade routes
Reduced summer stream flows
Species extinctions Increases indiseases.
Water scarcity
Related Climate IssuesRelated Climate Issues
Oceanacidification.
Extinctionof species.
Disrupt of food web.
Global dimming
Ozone depletion
Direct irradiance at theEarth's
surface.
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Nations using nonNations using non renewable energyrenewable energy
Share of appliances in globalShare of appliances in global
warmingwarming
WHAT DOES THE GRAPH SAYWHAT DOES THE GRAPH SAY
Increasing population which is treat to
Global Warming
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CHANGES NOTICED O ER A PERIODCHANGES NOTICED O ER A PERIOD
OF TIMEOF TIME
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PRESENTPRESENT SCENARIOSCENARIO
The ozone layer is depletingvery fastThe ozone layer is depletingvery fast
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Affectingfrom health toAffectingfrom health to
monumentsmonuments
ThenuclearThenuclear industries areindustries are
causingcausingglobal warmingglobal warming
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Save them if you
want, no wildlife
and humanlife to
extinct.
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The different aspects fromThe different aspects from
which the pollutioniscausingwhich the pollutioniscausing
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Future ifnot saved,Future ifnot saved,
WaterWater levels willlevels will riserise tremendouslytremendously
Due to Global warming,
water levels are risingtremendously, out of 15
mega cities, 12 cities in
the world are situated at
the coastal place. If the
warming is continuous
then most of the major
cities will be under thewater .
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The two majorThe two majorcities will becities will be
under waterunder water
SanFrancisco New - York
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Plant treesPlant trees
Ride bicycleRide bicycle
Use more publictransportUse more publictransport
What should be done to avoid warming
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Please savePlease save earth from burningearth from burning
THANK YOU
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