In testing the sensitivity of SLAMM to the salt elevation parameter I came across a situation that I'm having trouble understanding. At our tropical site, we had been using a salt elevation of 0.325 m above MTL and a GDT of 0.05 m. To test the sensitivity of the model to salt elevation, we reduced it by 25% to 0.244 and ran the model again to compare our results in 2100. As expected, as compared to the base run, we saw increases in most fresh habitats and much less mangrove creation, as fresh habitats were now allowed to persist to a lower elevation. However, the majority of the decrease in area of mangroves created was offset by a large increase in the amount of estuarine water created. I cannot understand how this would have happened. (It was not because more inland open water was turning into estuarine water, and it clearly appears to be an issue of area once converting to mangroves now instead converting to estuarine water).