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Published byRodney Gordon Modified over 9 years ago
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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 Satellites 1978 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 response globally
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Submerging coasts > 2 mm / yr
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Local effects shoreline 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 1987 C. 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
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