presentation 1 on global warming

8/14/2019 Presentation 1 on Global Warming

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Presentation onPresentation on

By:Group-8By:Group-8

SYMPHONYSYMPHONY


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T H E G R E A T E S T TH R E A T


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Effects of Global WarmingEffects of Global Warming

n Extreme Weather

n Melting Ice Sheet & Glaciers

n Raising Sea Levelsn Effects on Agriculture

n Effects on Plant & Animals

n Human Health

n Forest Fires


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Extreme WeatherExtreme Weather

Source ACIA, 2004Jennifer Allen Animation

nWarming temperaturesWarming temperatures

are already causingare already causing

significant changes tosignificant changes to

mountain glaciersmountain glaciersaround the world, icearound the world, ice

sheets in Greenland andsheets in Greenland and

the Antarctic, and polarthe Antarctic, and polar

sea ice in the Arct icsea ice in the Arct ic

n EFFECTS ON :n

IceIce Sheets & GlaciersSheets & Glaciers


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Storms are expected to be more

frequent and more intense in awarmer world. Water will alsoevaporate more rapidly fromsoil, causing it to dry out faster

between rains. Some regionsmight actually become drierthan before


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As the atmosphere warm s, the surface

layer of the ocean warm s as well,expanding in volume and thus raisingsea level. The m elt ing of glaciers and icesheets, especially around Greenland,

fur ther swells the sea.

Sea Levels


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For some time it was hoped that a positiveeffect of global warming would beincreased agricultural yields, because of

the role of carbon dioxide inphotosynthesis but climate change willdecrease the overall productivity

Effects on AgricultureEffects on Agriculture


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n

Polar bearsPolar bearsnWalrusesWalrusesnIce sealsIce sealsnBlack guillemotsBlack guillemotsnKittiwakesKittiwakesnSalmonSalmon

nCaribouCaribounArctic graylingArctic grayling

Rising temperatures

Shrinking habitatFood harder to getExpanding disease

Polar bearsWalruses

Ice seals

Caribou

Black guillemotsKittiwakes

Salmon

Arctic grayling

Effects on AnimalsEffects on Animals


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International Health ImpactsInternational Health Impacts

West Nile virus mosquito vector

Canadian Ministry of Forests

USFSphoto

Increased epidemics of malariain Africa and new cases in

Turkey and elsewhere

Increased cerebral-cardiovascular conditions inChina; dengue fever in SE Asia

In Europe, increased heat wave deaths (52,000 in 2003, (EPI

2006)), typhoid fever, Vibriovulnificus, Ostreopsis ovata,

Congo Crimea hemorrhagic fever

More mercury release; flooding; and storms

WHO: 150,000 deaths and 5million illnesses/year from GW;double by 2030 (Nature 2005)


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International Health ImpactsInternational Health Impacts

West Nile virus mosquito vector

Canadian Ministry of Forests

USFSphoto

Increased epidemics of malariain Africa and new cases in

Turkey and elsewhere

Increased cerebral-cardiovascular conditions inChina; dengue fever in SE Asia

In Europe, increased heat wave deaths (52,000 in 2003, (EPI

2006)), typhoid fever, Vibriovulnificus, Ostreopsis ovata,

Congo Crimea hemorrhagic fever

More mercury release; flooding; and storms

WHO: 150,000 deaths and 5million illnesses/year from GW;double by 2030 (Nature 2005)


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Ocean AcidificationOcean AcidificationOcean AcidificationOcean Acidification

CO2 + H20 HCO3- +H+

Water becomesmore acidic.

(ACID)

Remains in theatmosphere(greenhouse gas)

Dissolves insea water

CO2CO2

Over the last 200 years, about 50% of all CO2 produced on

earth has been absorbed by the ocean. (Royal Society 6/05)


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4.6 millionacres

burned in2005

6.6 millionacres

burned in2004

Forest FiresForest FiresForest FiresForest Fires

Bureau of Land Management

John McColgan photo

Source: NOAA National Climate Data Center

1960 1970 1980 1990 2000

6.0

5.0

4.0

3.0

2.0

1.0millionsofacres

Alaska Acres Burned 1956-2005


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Causes of Global WarmingCauses of Global Warming

n Green House Effect: The namecomes from an incorrectanalogy with the warming of air

inside a greenhouse comparedto the air outside thegreenhouse. The greenhouseeffect was discovered by Joseph

Fourier in 1824 and firstinvestigated quantitatively bySvante Arrhenius in 1896.

n


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Types of Green House GasesTypes of Green House Gases

n Carbon dioxide: The process of burning invariablyemits carbon dioxide. Burning fossil fuels like diesel,petrol, or gas is a major carbon dioxide producer.

The smoke emitted by various industries andfactories, coal fired electrical power plants, using firewood as fuel all add to the total carbon dioxide

levelsn Methane: Dumped, decaying garbage is a source of

methane and cow dung also emits methane. Tosome extent these methane can be made use as afuel for cooking purpose by setting up bio-gas plantswhich is fuelled by cow dung or by bio-degradable

waste.n Nitrous Oxide: Released primarily by plowing farm soils

and burning fossil fuels. Nitrous oxide traps about300 times more heat than does the same amount ofcarbon dioxide. Nitrous oxide is also released duringvarious agricultural and industrial processes.

n Chloro Fluro Carbons: Are widely used in refrigerators,air conditioners and in aerosol s ra s. The chloro


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Jason Liao

Proving the CaseProving the Case

Is it happening? Yes.All effects of global warm ing are provenand supported by research.We can all feel the heat .


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Arctic Ice Shrinkage

280,000 square miles of ice disappeared in a year.From 1958-1976, the average thickness of ice was 10feet.Now, the ice is less than 4 feet.Increased methane release in the air.In 2007, the Arctic ice was at its 30 year low.


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J ason Liao

n

Average air temperature has increased 1.1FAverage air temperature has increased 1.1Fover the century.over the century.

nIf carbon emission arent reduced, average airIf carbon emission arent reduced, average airtemperature can increase 3-10F.temperature can increase 3-10F.

nStarts the domino effect.Starts the domino effect.

Higher TemperaturesHigher Temperatures


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J ason Liao

n

Warmer temperatures cause ice to melt.Warmer temperatures cause ice to melt.nSea level has risen about 20 mm since theSea level has risen about 20 mm since the

1800s.1800s.

n

Sea level rises 3 mm/year.Sea level rises 3 mm/year.n

n

n

n

nOcean continues to become warmer andOcean continues to become warmer and

overcome cooler waters.overcome cooler waters.

Rising Sea LevelsRising Sea Levels

http://www.flickr.com/photos/tim_norris/2899047581/
http://www.flickr.com/photos/tim_norris/2899047581/http://www.flickr.com/photos/tim_norris/2899047581/


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J ason Liao

nIn 2003, more than 20,000 people in EuropeIn 2003, more than 20,000 people in Europeand 1,500 people died of heat waves.and 1,500 people died of heat waves.

n

nWarmer temperatures allow animals, insects,Warmer temperatures allow animals, insects,and microbes to thrive in once-cold areas.and microbes to thrive in once-cold areas.

n

nIn 2000, climate change caused over 150,000In 2000, climate change caused over 150,000deaths in the world.deaths in the world.

Heat Waves and DiseasesHeat Waves and Diseases


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J ason Liao

nHurricanes and tropical storms get energyHurricanes and tropical storms get energyfrom warm water.from warm water.

n

nEx. Hurricane Katrina.Ex. Hurricane Katrina.

Stronger StormsStronger Storms

http://www.flickr.com/photos/smiteme/218203422/
http://www.flickr.com/photos/smiteme/218203422/http://www.flickr.com/photos/smiteme/218203422/


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J ason Liao

nResearch shows that by 2050, of all speciesResearch shows that by 2050, of all specieswill become extinct.will become extinct.

nIn 1998, the species Golden Toad was drivenIn 1998, the species Golden Toad was driven

into extinction by global warming.into extinction by global warming.nDestroying coral reefs by suffocating theDestroying coral reefs by suffocating the

algae.algae.

nBirds will head to cooler climates.Birds will head to cooler climates.

Killing Off WildlifeKilling Off Wildlife


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n

Drive less. Take bikes, walk or carpool whenever possible.n

n Replace all the light bulbs in and around your home withenergy-efficient fluorescents that use fewer watts for thesame amount of light

n Choose energy-efficient appliances when it's time to buy newones.

n Decrease your air travel.

n Cut down on your garbagebuy fewer packaged materials toprevent further global warming.

n Unplug electronics when they are not in use, because they stilltake up energy. At the very least, turn items off whentheyre not being used.

Preventing Global WarmingPreventing Global Warming


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Preventing Global Warming .. ContPreventing Global Warming .. Cont

n Plant a tree.

n Buy recycled paper products and recycle as much of yourwaste as possible & use paper bags when shopping

n

n Use nontoxic cleaning products.

n Keep your car tuned up, and check tire pressure often tosave gas.

n

n Spread the word


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Gregory Zilberg

Global warming is a very real danger toGlobal warming is a very real danger toour way of life as we know it. Every dayour way of life as we know it. Every daywe get closer to reaching a disasterwe get closer to reaching a disaster

caused by the steadily increasing warmingcaused by the steadily increasing warmingof the atmosphere. There may be noof the atmosphere. There may be noabsolutely conclusive evidence that right-absolutely conclusive evidence that right-out silences the skeptics, but there isout silences the skeptics, but there is

enough conclusive evidence in favor ofenough conclusive evidence in favor ofthe argument FOR Global Warming.the argument FOR Global Warming.

Conclusion on Global WarmingConclusion on Global Warming


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THANK YOU


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NK YOUNK YOU


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presentation 1 on global warming

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