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Global Climate Change

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Global Climate Change. Sara Parr. Sigrid Smith. Kellogg Biological Station. What is Global Climate Change? Changes in ... What Causes Global Climate Change? ... – PowerPoint PPT presentation

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Title: Global Climate Change


1
Global Climate Change
  • Sara Parr
  • Sigrid Smith
  • Kellogg Biological Station

2
What is Global Climate Change?
  • Changes in global temperature
  • Changes in patterns of precipitation and extreme
    weather events (increased risk of droughts and
    floods)
  • additional sea-level rise that will gradually
    inundate coastal areas
  • threats to biodiversity
  • potential challenges for public health. 

3
Source http//www.sustainablescale.org/images/upl
oaded/GREENHOUSE20EFFECT.JPG
4
What does that mean for us?
  • Continuation of historical trends of greenhouse
    gas emissions will result in additional warming
    over the 21st century, with current projections
    of a global increase of 2.5ºF to 10.4ºF by 2100,
    with warming in the U.S. expected to be even
    higher.

5
What Causes Global Climate Change?
  • Increases in greenhouse gas concentrations,
    particularly water vapor, CO2, CH4, N2O, CFCs,
    and HCFCs
  • Decreases in the cover of ice sheets changes the
    albedo of the earth
  • Land use changes and changes in the water cycle
    may also influence global climate change.

6
http//www.mlo.noaa.gov/HISTORY/PUBLISH/20th20ann
iv/Geophy/GAS/Co2/figure20320(40).gif
7
Lake ice data
  • Another longterm data record collected for
    several lakes
  • Predictions If global temperatures are
    increasing, we might see
  • Later ice formation in winter (ice-on)
  • Earlier ice thawing in spring (ice-off)
  • Shorter ice duration (number of days lake is
    frozen during winter)
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