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The impacts of greenhouse gases on global warming

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The impacts of greenhouse gases on global warming

  1. 1. The Impacts of Greenhouse Gases on Global Warming
  2. 2. Global WarmingGlobal warming is the rise in the averagetemperature of Earths atmosphere andoceans since the late 19th century.Since the early 18th century, Earthsmean surface temperature has increasedby about 1.4 °Chttp://www.youtube.com/watch?v=pG41xDxrzI8&feature=related
  3. 3. What Causes Global Warming Particulates and soot Greenhouse Solar gases activity Global Warming
  4. 4. What is greenhouse gasesGases that trap heat in theatmosphere are called greenhousegases. Water vapor (H2O) Carbon dioxide (CO2) Methane (CH4) Nitrous oxide (N2O) Ozone (O3) Fluorinated gases (CFCs) U.S. Greenhouse Gas Emissions in 2010
  5. 5. Greenhouse EffectThe Greenhouse Effect is theeffect of greenhouse gases inthe Earth’s atmospheretrapping heat that is releasedfrom the Earth.
  6. 6. Greenhouse Gases SourcesMost greenhouse gases have both natural andhuman-caused sourcesCarbon dioxide Burning fossil fuels (coal, natural gas and oil) Solid waste, trees and wood products, and also as a result of certain chemical reactions
  7. 7. Greenhouse Gases SourcesNitrous oxide Agricultural and industrial activities Combustion of fossil fuels and solid waste.Methane Production and transport of coal, natural gas, and oil. Livestock and other agricultural practices.
  8. 8. ImpactsPhysical impacts Social systemsBiological systems
  9. 9. Physical impactsExtreme weather Heat waves Tornadoes Thunderstorms Cold waves
  10. 10. Physical impactsGlacier retreat and disappearanceFuture changes in glaciers: Mountainous areas in Europe will face glacier retreat In Polar regions, there will be reductions in glacier extent and the thickness of glaciers.
  11. 11. Physical impactsOcean acidificationThe ongoing decrease in the pHof the Earth s oceans , caused bythe uptake of carbon dioxidefrom the atmosphere .This ongoing acidification of theoceans poses a threat to thefood chains connected with theoceans.
  12. 12. Social systemsFood supply Increasing the frequency of extreme events, and modified weed, pest, and pathogen pressure. Low-latitude areas are at most risk of having decreased crop yields.Health Change the range of some infectious disease vectors. e.g Mosquito can infect malaria.
  13. 13. Biological systemsExtreme weather Global warming had strongly affected natural biological systems, such as plants and animals In the Northern Hemisphere, species are almost uniformly moving their ranges northward and up in elevation in search of cooler temperatures.
  14. 14. What We Can Do?Government Reduce emissions of greenhouse gases Improve the energy efficiency and vehicle fuel economy. Increases the renewable sources, such as wind, solar power, hydrogen sources, biofuels resource Set up laws to reduce emissions from factories
  15. 15. What We Can Do?
  16. 16. Low-carbon LifeLow-carbon life means lifestyle tominimize the energyconsumed, thereby reducing carbondioxide emissions. less meat more bicycles less light
  17. 17. ReferenceClimate changes. (2007). BBC Weather Centre. Accessed athttp://www.bbc.co.uk/climate/evidence/carbon_dioxide.shtmlEtheridge, D. M., Steele, L. P., Langenfelds, R. L., Francey, R. J.,Barnola, J.-M., &Morgan, V. I. (1996). Natural and anthropogenic changes in atmospheric CO2 over thelast 1000 years from air in Antarctic ice and firn. Journal of Geophysical Research, 101,4115–4128. doi:10.1029/ 95JD03410.Keeling, C. D. (2007). Atmospheric CO2 calculations derived from in situ air samplescollected at Mauna Loa observatory, Hawaii. Accessed athttp://cdiac.ornl.gov/ftp/trends/co2/maunaloa.co2Bogan, R., Ohde, S., Arakaki, T., Mori, I., & McLeod, C. (2009). Changes in Rainwater pHassociated with Increasing Atmospheric Carbon Dioxide after the Industrial Revolution.Water, Air & Soil Pollution, 196(1-4), 263-271. doi:10.1007/s11270-008-9774-0Sea level: Climate Change. (2010): US EPA. Publisher: US EPA. Accessed at:www.epa.gov/climatechange/science/indicatorsLobell DB, Burke MB, Tebaldi C, Mastrandrea MD, Falcon WP, Naylor RL (2008)."Prioritizing climate change adaptation needs for food security in 2030". Science 319(5863): 607–10. doi:10.1126/science.1152339. PMID 18239122.
  18. 18. Thank You!

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