Hi, everyone

I simulated the effect of marsh area change to the regional climate using RegCM3 in 10km resolution. I found that when the marsh area increased, the simulation temperature increased too. But the analysis of weather station datum showed that the temperature increased where the marsh area decreased. Whether the regional climate model RegCM3 is not suitable for me to do the numerical simulation or the resolution I used is too large? Who can help me?

Best regards!