to obtain slr records
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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To obtain SLR records
1. Tide gauge records (RSLR)
2. Find something that “keeps up” with sea level (coral reefs, marshes) RSLR -- worry
about crustal movements! GPS data.
3. Measure absolute SLR from satellite data (average over many points - tides, dynamic
ocean topography)
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Sea level change
Volume of ocean basins
Mass of water
Volume of water
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Sea Level Change Over the Last 500 Million Years
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Sea Level Change Over the Last 1 Million Years
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Sea Level Rise Over the Last 24,000 Years
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Sea Level Rise Over the Last 24,000 Years
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Sea Level Rise Over the Last 8,000 Years
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Average Sea Level Rise Over the Last 120 Years
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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Relative Sea Level Change Based on Tide Gage Data
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RSL Change: Juneau, AKAn Example of Post Glacial Rebound
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Eustatic Sea Level Rise Estimates
Sea Level Rise Rate (mm/yr)
Years No. of Tide
Stations
Investigators
1.43 1881-1980 152 Barnett2.27 1930-1980 152 Barnett1.2 1880-1982 130 Gornitz &2.4 1920-1970 40 Peltier &
1.75 1900-1979 84 Trupin & 1.8 1880-1980 21 Douglas, et al
1.62 1807-1988 213 Unal &
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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
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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
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Long Island Sound Relative Sea level Rise Curves
Varekamp and Thomas
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IPCC Estimates of Future SLR
Date of IPCC Prediction
Time Period (Years)
IPCC Sea Level Rise
Ranges
IPCC Mid Range Estimate
1995 1990 to 2100
15 cm to 95 cm
50 cm
2001 1990 to 2100
8 cm to 88 cm 49 cm
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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Istanbul
LagosLima
Buenos Aires Rio de JaneiroMadras
KarachiJakarta
Calcutta
MumbaiBangkok
ManilaShanghai
Osaka
Tokyo
SeoulTianjinDhaka
New York
Los Angeles
Projected Coastal Megacities:
2010 By 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.
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Example from Holland - flood disaster of 1953
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Not Good, about 2300people drowned
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The ‘DELTA WORKS’ (dunglish)
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
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QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.