How can past ea level changes inform us about future anthropogenically driven sea level changes?
Rough notes to guide:
-Diagnosis encouraged
-Rate has increased over the last 100 years
-What is anthropogenically driven sea level? See AR5 IPCC projections change and compare with those of IPCC AR4 - what are the changes in two reports based on?
- Are these estimates conservative?
-How do we determine past sea level?
- Foraminifera?
- Remove temperature signal?
- Direct determination from corals.
Uncertainties must be taken into account
-Relative SLC (global mean which takes isostatic adjustment into account)
-Suggestion:
mid-Pleistocene warm period (cant constrain dynamic topography) - world with no ice,
Holocene case studies
Look at rates of change not actual levels.
- Are they the same?
- Are they faster?
- How do they compare predicted rates?
Equilibrium response - slow feedback e.g. SLR.
Don't just consider next 100 years but beyond.
Tip: Make your own diagrams, where possible, using NOAA, or Pangaea.