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Arctic Climate Change

Arctic Climate Change. Presented by: Ben Chou and Kelly Cunningham. Global Temperature Anomalies. Dec-Jan-Feb 2001-2005. Jun-Jul-Aug 2001-2005. Data Source: NASA GISS GHCN, 2006. Greenland Summer Melt.

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Arctic Climate Change

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  1. Arctic Climate Change Presented by: Ben Chou and Kelly Cunningham

  2. Global Temperature Anomalies Dec-Jan-Feb 2001-2005 Jun-Jul-Aug 2001-2005 Data Source: NASA GISS GHCN, 2006

  3. Greenland Summer Melt • Summer melt increased by 17% from 1992-2002; SLR from continental melting: 5.9 +/- 1.6 cm Source: Comiso and Parkinson, 2004

  4. Arctic Sea Ice 1979 2005 Total decrease summer sea ice: 20-50%, 1.3 mil km2 Summer: 8-10%/decade; Winter: 6-7%/decade Source: Walker, 2006

  5. Ice-Albedo Feedback Ice-Albedo Animation Source: Comiso and Parkinson, 2004

  6. Arctic Permafrost • Retreat 31 cm/yr • Stores 1/3 of global soil carbon • Models predict loss of 50% by 2050; 90% by 2100 Source: Lawrence and Slater, 2006

  7. “Take Home” Messages Arctic: a global indicator for climate change: 1) Melting of Greenland and Arctic glaciers will induce sea level rise and could weaken or disrupt THC 2) Retreat of snow and sea-ice reduces planetary albedo, and melting of permafrost releases GHGs – both exacerbate global warming 3) The sensitive dynamics of its ecosystem have contributed to accelerated warming in the Arctic

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