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To obtain SLR records

To obtain SLR records. Tide gauge records (RSLR) Find something that “keeps up” with sea level (coral reefs, marshes) RSLR -- worry about crustal movements! GPS data. Measure absolute SLR from satellite data (average over many points - tides, dynamic ocean topography). Sea level change.

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To obtain SLR records

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  1. To obtain SLR records Tide gauge records (RSLR) Find something that “keeps up” with sea level (coral reefs, marshes) RSLR -- worry about crustal movements! GPS data. Measure absolute SLR from satellite data (average over many points - tides, dynamic ocean topography)

  2. Sea level change Volume of ocean basins Mass of water Volume of water

  3. Sea Level Change Over the Last 500 Million Years

  4. Sea Level Change Over the Last 1 Million Years

  5. Sea Level Rise Over the Last 24,000 Years

  6. Sea Level Rise Over the Last 24,000 Years

  7. Sea Level Rise Over the Last 8,000 Years

  8. Average Sea Level Rise Over the Last 120 Years

  9. Relative Sea Level Change Based on Tide Gage Data

  10. RSL Change: Juneau, AKAn Example of Post Glacial Rebound

  11. Eustatic Sea Level Rise Estimates

  12. Subsidence • Subsidence can be substantial exceeding the eustatic component significantlyLong Beach, CA: > 6 m due to hydrocarbon extractionTokyo: 3.5 m due to water extractionOsaka: > 2 m due to water extractionCoastal Louisiana: Up to 1 m per century due to natural and anthropogenic causes

  13. Is Sea Level Accelerating? (1) There are Indications of Sea Level Acceleration Although They Are Weak and do not Appear to be Increasing(2) Probably Won’t Know About Anthropogenic Effects Definitively for 30 or More Years

  14. Long Island Sound Relative Sea level Rise Curves Varekamp and Thomas

  15. IPCC Estimates of Future SLR

  16. Projected Coastal Megacities: 2010By 2100, tens of millions/year will have to respond to coastal flooding; Most vulnerable regions are South and South-East Asia; Africa; Carribean; Indian Ocean Islands; Pacific Ocean Islands. Tianjin Dhaka Seoul Osaka Istanbul Tokyo New York Shanghai Los Angeles Manila Bangkok Lagos Mumbai Lima Karachi Madras Jakarta Rio de Janeiro Buenos Aires Calcutta

  17. Example from Holland - flood disaster of 1953

  18. Not Good, about 2300 people drowned

  19. The ‘DELTA WORKS’ (dunglish)

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