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1 Climate Change. 2Contents1.Climate 2.What is climate change? 3.Causes of climate change 4.Effects of climate change 5.Facts on climate change 6.How.

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Presentation on theme: "1 Climate Change. 2Contents1.Climate 2.What is climate change? 3.Causes of climate change 4.Effects of climate change 5.Facts on climate change 6.How."— Presentation transcript:

1 1 Climate Change

2 2Contents1.Climate 2.What is climate change? 3.Causes of climate change 4.Effects of climate change 5.Facts on climate change 6.How to control climate change? 7.conclusion

3 3Climate Weather conditions observed over a long period of time for a given area. Weather conditions observed over a long period of time for a given area. There can be variations in climate from year to year, or one decade to another, one century to another, or any longer time scale. There can be variations in climate from year to year, or one decade to another, one century to another, or any longer time scale.

4 4 What is climate change ??? 1. Climate change is a long-term change in the statistical distribution of weather patterns over periods ranging from decades to millions of years. weatherperiodsweatherperiods 2. It may be a change in average weather conditions or the distribution of events around that average (e.g., more or fewer extreme weather events). Climate change may be limited to a specific region or may occur across the whole Earth. regionEarthregionEarth

5 5 Causes of climate change 1. Forcing Mechanism-It is the process which causes the changes in climatic condition of a place or a region.Forcing mechanisms are of two types- a) Internal a) Internal b)External b)External 2. Green House Effect

6 6 Internal forcing mechanisms Natural changes in the components of earth's climate system and their interactions are the cause of internal climate variability, or "internal forcing”. For e.g. ocean variability.

7 7 External forcing mechanisms Climatic changes due to external forces such as human activities is known as external forcing mechanisms. For e.g. increase in CO2 levels due to emissions from fossil fuel combustion, followed by aerosols (particulate matter in the atmosphere) and cement manufacture. fossil fuelaerosolscementfossil fuelaerosolscement

8 8 Greenhouse effect The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions.greenhouse gasesgreenhouse gases

9 9 Effects of climate change 1. M elting of Glacier 2. R ise in Global temperature (Global warming) 3. C hange in landmarks (Continents) 4. O n Biodiversity 5. C hange in Human beings 6. S hifting of sea level

10 10 Glacier melting

11 11 The causes of glacier melting 1.Global Warming 1.Global Warming2.Pollution 3.Industrial revolution 4.Burning of fossil fuels, coal and oil 5.Deforestation

12 12 Global warming 1.Global warming is the continuing rise in the average temperature of Earth's oceans and atmosphere. average temperature of Earthaverage temperature of Earth 2. Global warming is caused by human activities, especially those that increase concentrations of greenhouse gases in the atmosphere, such as deforestation and burning of fossil fuels. human activitiesgreenhouse gaseshuman activitiesgreenhouse gases

13 13

14 14 Effects of climate change on continents North America: Decreasing snow pack in the western mountains; 5-20 percent increase in yields of rain-fed agriculture in some regions; increased frequency, intensity and duration of heat waves in cities.

15 15 South America: Gradual replacement of tropical forest by savannah in eastern Amazonia; risk of significant biodiversity loss through species extinction in many tropical areas; significant changes in water availability for human consumption, agriculture and energy generation. South America: Gradual replacement of tropical forest by savannah in eastern Amazonia; risk of significant biodiversity loss through species extinction in many tropical areas; significant changes in water availability for human consumption, agriculture and energy generation.

16 16 Europe Europe More frequent coastal flooding and increased erosion from storms and sea level rise; glacial retreat in mountainous areas; reduced snow cover; extensive species losses; reductions of crop productivity in southern Europe. More frequent coastal flooding and increased erosion from storms and sea level rise; glacial retreat in mountainous areas; reduced snow cover; extensive species losses; reductions of crop productivity in southern Europe.

17 17 Africa: Africa: By 2020, between 75 and 250 million people are projected to be exposed to increased water stress; yields from rain-fed agriculture could be reduced by up to 50 percent in some regions. By 2020, between 75 and 250 million people are projected to be exposed to increased water stress; yields from rain-fed agriculture could be reduced by up to 50 percent in some regions.

18 18 Asia: Freshwater availability projected to decrease in Central, South, East and Southeast Asia by the 2050s; coastal areas will be at risk due to increased flooding; death rate from disease associated with floods and droughts expected to rise in some regions.

19 19 Climate Change Effects on Biodiversity

20 20 Effect of climate change on human beings E E E E E cccc oooo nnnn oooo mmmm iiii cccc l l l l oooo ssss ssss eeee ssss, Loss of life Well being or health. Negative impacts in social & political areas

21 21 Facts about climate change The atmospheric concentration of CO 2 has increased by more than 30%, trapping more heat in the lower atmosphere causing risks to health. The atmospheric concentration of CO 2 has increased by more than 30%, trapping more heat in the lower atmosphere causing risks to health.

22 Weather extremes – Weather extremes – heavy rains, floods,Disasters Hurricane Katrina 22

23 23 Intense short-term fluctuations in temperature can also seriously affect health – causing heat stress (hyperthermia) or extreme cold (hypothermia).

24 24

25 25 Rising sea levels

26 26 More variable rainfall patterns More variable rainfall patterns

27 27 Reduced crop yields in many tropical developing regions, where food security is already a problem.

28 28 How to control climate change ? Start afforestation and stop deforestation. Start afforestation and stop deforestation. Stop using products which releases CFC to stop global warming and ozone depletion. Stop using products which releases CFC to stop global warming and ozone depletion. Use CNG instead of petrol and diesel. Use CNG instead of petrol and diesel. Use CNG instead of burning coal, wood and fossil fuels. Use CNG instead of burning coal, wood and fossil fuels. Start cycling or walking to short distances. Start cycling or walking to short distances. Use carpool or common transport system. Use carpool or common transport system.

29 29 Recycle your organic waste. Recycle your organic waste. Choose products that come with little packaging and buy refills. Re-use paper! Choose products that come with little packaging and buy refills. Re-use paper! When the time comes to change your car battery, recycle your old one. When the time comes to change your car battery, recycle your old one. Stop using plastic bags instead use cloth or paper bags. Stop using plastic bags instead use cloth or paper bags. Encourage to use electricity generated from windmill and solar energy. Encourage to use electricity generated from windmill and solar energy. Follow three ‘R’ principle-Reduce Follow three ‘R’ principle-Reduce Reuse Reuse Recycle Recycle

30 30 Do’s And Dont’s

31 31

32 32 Conclusion We have seen the ill effects of climate changes on human beings, plants, animals and on our Mother Earth. Therefore, we must take an oath today to take all precautionary measures in all respect to protect our Mother Earth. We have seen the ill effects of climate changes on human beings, plants, animals and on our Mother Earth. Therefore, we must take an oath today to take all precautionary measures in all respect to protect our Mother Earth.

33 33 Made by :- Jyotsnamayee Ram STD-IX DIV-B D.A.V PUBLIC SCHOOL, NEWPANVEL

34 COURTESY Wikipedia Wikipedia Google Google Yahoo Yahoo 34


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