possibly add temporal decay for slash (and fire dead?)

[aldivi]

first look at this in a spreadsheet, but will likely have to add it. Use arrays the length of which is the years over which decay occurs. parameterize an exponential function for remaining material, and store the annual losses. the rates will be based on the values from measured net changes; but compare with the one paper shift the values each year once they have been subtracted from the pools.

[aldivi]

the spreadsheet shows that this has a negligible difference, with largest divergence within a few years of stopping and starting management