Reservoir volumes of water
Jan 31, 2016
Reservoir volumes of water
Ice volume & equivalent water depth
The geoid – mean “sea level”
Map prior to satellite records
Modern geoid (SL) – areas of high variability
SL variability greatest near major currents
Gulf Stream and Loop Current
Oceanographic Satellites1978 SEASAT sea-surface temperature and chlorophyll (productivity)1992 TOPEX & JASON
Geometry of satellite altimetry
Defining the geoid
TOPEX
TOPEX Dynamic Topography
TOPEX
TOPEX Wave Height
Mean dynamic topography, Atlantic
Gulf Stream rings
Dynamic topography
Satellite tracks across the Gulf Stream
Ice and isostasy
The basic idea has been around for a while
RSL over last 5 ka
variable responseglobally
Submerging coasts
> 2 mm / yr
Local effectsshoreline configuration
Greater hydro-isostatic depression for promontory
Local effects on apparent sea level
Increased tidal range within an embayment
Choose your RSL curve
North America Away from the big ice
North America
northern areas
Modeling the forebulge
Local to regional effect
Retreat of the forebulge
RSL Atlantic Coast of Canada
RSL Europe
RSL East Asia
Global pattern of RSL >50 yrs
Tide-gauge records
Isostatic rebound
Regional RSL curves Great Britain
Global tectonic effects on RSL
1 Ma to 100 Ma
Timing of late Quaternary highstands
A. Chappell & Shackleton 1986 B. Shackleton 1987C. Bloom & Yonekura 1990
Huon Peninsula, Papua New Guinea
Shoreline terraces preserved by uplift
Earthquakes on the Huon Peninsula
Huon Peninsula
text
Cutting coastal terraces
Several options for the same terrace setting
Stage 5e on the Huon Peninsula
The “prominent terrace”
Late Quaternary highstand reference points
Barbados
Huon Peninsula
Huon Peninsula record compared with the marine isotope record
Chronology – close enough?
The Fairbanks curve
U-series on corals from Barbados