Because both historical flood frequency and projected SLR are uncertain, we combine
joint probability distributions of the two to calculate AFs and their uncertainties over time.
However, since our methods can be applied to arbitrarily
specified joint probability distributions, they can more generally account for any measured correlations between responses.
For example, choosing all the 95 % high warming input values, which has
a joint probability of 1 in 2.5 million, will lead to a temperature increase of 8.1 ° C in 2100.