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A Disappearing Act: Gulf Coast Barrier Islands and threats posed by climate change

A Disappearing Act: Gulf Coast Barrier Islands and threats posed by climate change. Rebekah Jones. Use of GIS and remotely sensed data to measure surface area loss Government intervention methods to protect barrier islands, if any History of island use

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A Disappearing Act: Gulf Coast Barrier Islands and threats posed by climate change

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  1. A Disappearing Act:Gulf Coast Barrier Islands and threats posed by climate change Rebekah Jones

  2. Use of GIS and remotely sensed data to measure surface area loss Government intervention methods to protect barrier islands, if any History of island use Projections for sea level rise, hurricane activity compared to that of recent years Questions and Approach How have barrier islands been affected by recent hurricane activity? Does climate change pose a threat to Gulf Islands? Are the effects of climate change already manifesting on the surface? What role do barrier islands play in protecting the shoreline? What will the degradation of these islands mean for storm surge on the coast?

  3. Ship Island, Miss 2000 (left) and 2005 (right) Landsat 5 images of damage following Hurricane Katrina. Ship Island has lost 65 percent of its total surface area since 1948.

  4. April 1998 April 1998 April 1998

  5. NDVI Åug. 2006 Sept. 2010 April 1998 April 1998

  6. Findings: • Overall massive loss of surface area since 1986 • Disruption in the natural aggradation cycle of island regeneration, and possible total submergence of secondary islands by 2025, and main islands by 2040 • Loss of life, increased property damage and coastal retreat from intensified storm surge a possible result • Overall displacement of large populations resulting from an irreversible process which appears to be worsening

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