global-warming-final pptfo isap

8/7/2019 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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