Global climate change
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Climate change refers to seasonal changes over a long period of time. Worldwide, people are paying serious attention to climate change. Because so many systems are tied to climate, such as, people, plants and animals live, such as food production, availability and use of water, and health risks.
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Global climate change
- 2. Changing climate Causes of climate change Effects of climate change Statistical Statement Illustrate the climatic situation Recommendation Question and Answer Secession 2sakil.iubat@gmail.com
- 3. • Climate change refers to seasonal changes over a long period of time. • Worldwide, people are paying serious attention to climate change. • Because so many systems are tied to climate, such as, people, plants and animals live, such as food production, availability and use of water, and health risks. 3sakil.iubat@gmail.com
- 4. Climate change Natural Factors Volcanic eruptions Ocean current Earth orbital changes - Solar variations Forest fire Artificial Factors Human activities Emission of green house gases Solar radiation 4sakil.iubat@gmail.com
- 5. Natural Factors • Volcanic eruptions • Ocean current When a volcano erupts it throws out large volumes of sulphurdioxide (SO2), water vapour, dust, and ash into the atmosphere The oceans are a major component of the climate system. Ocean currents move vast amounts of heat across the planet. 5sakil.iubat@gmail.com
- 6. Forest fire Earth orbital changes The earth makes one full orbit around the sun each year. It is tilted at an angle of 23.5 to the perpendicular plane of its orbital path. Changes in the tilt of the earth can lead to small but climatically important changes in the strength of the seasons. A wildfire is any uncontrolled fire in an area of combustible vegetation that occurs in the countryside or a wilderness area. Natural Factors 6sakil.iubat@gmail.com
- 7. Human Activities There is strong evidence that the climate change over the last half-century has been caused largely by human activity, such as the burning of fossil fuels and including agriculture and deforestation." 7sakil.iubat@gmail.com
- 8. • Emission of green house gases such as… • Solar radiation 51% of solar radiation absorb by earth. 20% scattered by the clouds19% absorb by clouds and atmosphere and 6% scattered by atmosphere,4% reflected by surface. water vapour, carbon dioxide, methane, nitrous oxide, ozone and CFC's. 8sakil.iubat@gmail.com
- 9. Effect of greenhouse gases. Nitrous oxide Water vapor Carbon dioxide Methane Sulfur hexafluoride Greenhouse gases trap the infrared heat that is trying to escape back into space. Increase in the global average surface temperature . Greenhouse effect, contributing to global warming. The atmospheric trapping, or reflection of radiant energy back toward the earth. 9sakil.iubat@gmail.com
- 10. Global Warming Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases. 10sakil.iubat@gmail.com
- 11. Sea level rising. Global temperature is rising. Health risk. Melting polar icebergs and glacier. Arctic sea ice loss. 11sakil.iubat@gmail.com
- 12. Melting Of Glacier Nearly 97% of Greenland's surface ice sheet thawed during a four day period in July - more than it ever has in the last 30 years, NASA satellite data shows.. 12sakil.iubat@gmail.com
- 13. Acid Rain Acid rain is a rain or any other form of precipitation that is unusually acidic. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxides, which react with the water molecules in the atmosphere to produce acids. 13sakil.iubat@gmail.com
- 24. Globally, power generation emits nearly 10 billion tons of CO2 per year. Use Alternative energy such as Wind power Solar energy etc 24sakil.iubat@gmail.com
- 25. Worldwide, motor vehicles currently emit well over 900 million metric tons of CO2 each year. Use Electronic Car or Solar car as alternative of Diesel, Petrol or gas engine. 25sakil.iubat@gmail.com
- 26. Each year worldwide, currently over 93 million metric tons of CFC emit by AC, Refrigerator, Aerosol and Body spray etc. 26sakil.iubat@gmail.com
- 27. Earth's total forest area continues to decrease at about 13 million hectares per year. Planted 2 tree against 1 tree cutting. 27sakil.iubat@gmail.com
Notas del editor
- While there are many substances that act as greenhouse gases, two of the most important are water and carbon dioxide, or CO2.