Maybe Steve M wants to set up a thread on the paper? JEG provided this url:
moshpit, when I can’t compute exact solutions, I simulate it.
As for autocorrelation, given the sparseness of the data points in the time domain, maybe the autocorrelation is very weak? If autocorrelation is strong enough to violate assumption of independence, why not sub-sample (and iteratively resample) the data so that they are independent?
In general, resampling seems to be under-utilized in climate science
I’ll try to get to this within a couple of weeks.