Research targets 2000 years of climate-induced sea level fluctuations



Sea level rise as a consequence of “greenhouse-induced” global warming has been a major focus of global change science for the last 2 decades. The principle approach has been to test climate-forced sea level models by comparing model results with regional or global averages of sea level rise based on multidecadal, and in a few cases, centennial tidegauge records, corrected for local crustal movements that in turn are based on millennialscale records of relative sea level change. The majority of the multi-decadal instrumental records are inherently noisy (±0.3 m) due to sub-decadal and decadal variability in ocean temperature, salinity fields,and circulation, any of which can affect density and hence local sea level. This variability is induced by atmospheric and oceanographic phenomena such as ENSO.