Unit 3 pp #5
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Unit 3 pp #5






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Unit 3 pp #5 Unit 3 pp #5 Presentation Transcript

  • Global Climate Change
    • Created as part of
National Science Foundation ITEST Grant #0833706.
    • Any opinions, findings, and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation. 
  • Global Climate Change
    • Identifiable change in the climate of Earth as a whole that lasts for an extended period of time (decades or longer)
      • When due to natural processes, it is usually referred to as global climate variability
      • Usually refers to changes forced by human activities that change the atmosphere
    View slide
  • What causes Earth’s climate to change?
    • Changes in the atmosphere
    • Natural processes
      • Volcanoes
      • Tectonic plate movement
      • Changes in the sun
    • Human activities – any activity that releases “greenhouse gases” into the atmosphere
    View slide
  • What are greenhouse gases? Any gases that cause the “greenhouse effect!” carbon dioxide nitrous oxide methane Imagine… a car on a cool but sunny day… water vapor
  • GLOBAL CLIMATE CHANGE Who's researching it?
  • Research
    • Almost 1000 studies dealing with different aspects of climate change have been conducted and published
    • So… how do we make sense of all this?
  • Intergovernmental Panel on Climate Change (IPCC)
    • Why was it created?
      • Created in 1988 by the United Nations Environmental Program
      • Established to provide policy-makers with an objective source of information about climate change
  • Intergovernmental Panel on Climate Change (IPCC)
    • Who is it?
      • Governments
        • Members of the UN
        • Participate by naming experts and reviewing the reports before they’re published
      • Scientists
        • Close to 1000 scientists
        • Climatologists, ecologists, atmospheric physicists, and others
    Dr. Susan Solomon, a NOAA atmospheric chemist, an IPCC member and one author of IPCC summary
  • Intergovernmental Panel on Climate Change (IPCC)
    • What do they do?
      • Review current scientific and technical literature relevant to global climate change
      • Provide reports on their findings at regular intervals
      • Reports are designed to be politically neutral and of high scientific and technical standards
  • GLOBAL CLIMATE CHANGE Well, what does the data say?
  • Observed Changes and Effects
  • Warming of Climate
    • Warming of the climate is definitely occurring and can be observed by the:
      • Increases in global sea and air temperatures
      • Widespread melting of snow and ice
      • Rising global sea level
  • Temperature Change Data 1880-1884
  • 1880-1884 1886-1890
  • 1896-1900
  • 1906-1910
  • 1916-1920
  • 1926-1930
  • 1936-1940
  • 1946-1950
  • 1956-1960
  • 1966-1970
  • 1976-1980
  • 1986-1990
  • 1996-2000
  • 2003-2007
  • Other Observed Changes and Effects
    • 89% of current changes in ecosystems are consistent with changes expected due to global climate change
    • Carbon dioxide, methane, and nitrous oxide levels in atmosphere have increased greatly due to human activities since 1750 and now far exceed previous levels
    • Carbon dioxide has increased by approximately 80% since 1970
  • Human-Produced Greenhouse Gas Levels
  • Causes of Change
  • Most of the observed increase in global average temperature since the mid-20 th century is very likely due to the observed increase in human-caused greenhouse gas concentrations and human influences have very likely contributed to sea level rise, too.
  • References
    • IPCC Summary Report for Policy Makers . November 2007
    • &quot;About IPCC.&quot; IPCC - Intergovernmental Panel on Climate Change . 20 Apr. 2009 <http://www.ipcc.ch/about/index.htm>.
    • &quot;Climate Change | U.S. EPA.&quot; U.S. Environmental Protection Agency . 20 Apr. 2009 <http://epa.gov/climatechange/index.html>.
    • Rischard, J. F. High noon twenty global problems, twenty years to solve them . New York: Basic Books, 2002.
    • &quot;SVS Animations.&quot; NASA Goddard Scientific Visualization Studio . 20 Apr. 2009 <http://svs.gsfc.nasa.gov/vis/a000000/a003400/a003490/index.html>.