Reservoir volumes of water
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Transcript of Reservoir volumes of water
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Reservoir volumes of water
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Ice volume & equivalent water depth
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The geoid – mean “sea level”
Map prior to satellite records
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Modern geoid (SL) – areas of high variability
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SL variability greatest near major currents
Gulf Stream and Loop Current
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Oceanographic Satellites1978 SEASAT sea-surface temperature and chlorophyll (productivity)1992 TOPEX & JASON
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Geometry of satellite altimetry
Defining the geoid
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TOPEX
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TOPEX Dynamic Topography
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TOPEX
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TOPEX Wave Height
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Mean dynamic topography, Atlantic
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Gulf Stream rings
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Dynamic topography
Satellite tracks across the Gulf Stream
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Ice and isostasy
The basic idea has been around for a while
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RSL over last 5 ka
variable responseglobally
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Submerging coasts
> 2 mm / yr
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Local effectsshoreline configuration
Greater hydro-isostatic depression for promontory
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Local effects on apparent sea level
Increased tidal range within an embayment
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Choose your RSL curve
North America Away from the big ice
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North America
northern areas
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Modeling the forebulge
Local to regional effect
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Retreat of the forebulge
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RSL Atlantic Coast of Canada
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RSL Europe
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RSL East Asia
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Global pattern of RSL >50 yrs
Tide-gauge records
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Isostatic rebound
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Regional RSL curves Great Britain
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Global tectonic effects on RSL
1 Ma to 100 Ma
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Timing of late Quaternary highstands
A. Chappell & Shackleton 1986 B. Shackleton 1987C. Bloom & Yonekura 1990
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Huon Peninsula, Papua New Guinea
Shoreline terraces preserved by uplift
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Earthquakes on the Huon Peninsula
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Huon Peninsula
text
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Cutting coastal terraces
Several options for the same terrace setting
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Stage 5e on the Huon Peninsula
The “prominent terrace”
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Late Quaternary highstand reference points
Barbados
Huon Peninsula
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Huon Peninsula record compared with the marine isotope record
Chronology – close enough?
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The Fairbanks curve
U-series on corals from Barbados