1) Add reference height limit and unify canopy height of IGBP land types; 2) [by @Wenzong Dong] set uniform thermal paras and add output diag output for urban modle.

1) Add reference height limit and unify canopy height of IGBP land types; 2) [by @Wenzong Dong] set uniform thermal paras and add output diag output for urban modle. #301