You could use 1m by 2050 as the benchmark and
calculate the GIMBI from there: thus by
trending (you do nt have to use straight line)
sea level rise to that date and valuing every additional piece of new information as it happens the
trend will be affected and therefore GIMBI.
Notes: Excel was used to
calculate and plot the moving
sea level per century curves and fitted
trends (Excel slope function produced
trends based on moving 360 - month periods for each month in the dataset; then converted to per century
trends (inches) for each month).