Why do the maximum intensities in modeled tropical cyclones vary under the same environmental conditions?

Dandan Tao1, Michael M Bell1, Richard Rotunno2 and Peter Jan van Leeuwen3, (1)Colorado State University, Department of Atmospheric Science, Fort Collins, CO, United States, (2)National Center for Atmospheric Research, Mesoscale & Microscale Meteorology Division, Boulder, CO, United States, (3)Colorado State University, Atmospheric Sciences, Fort Collins, CO, United States