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Unit 3 pp #5
 

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 What is it?
    • 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
    • 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
    • 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>.