Lake simulations in CLM4.5

[18729351715@163_com]

Recently ,I made lake simulations using clm4.5 I want to simulate lake surface temperature , but I don't know which variable i should use float TLAKE(time, levlak, lat, lon)levlak = 0.05, 0.6, 2.1, 4.6, 8.1, 12.6, 18.6, 25.6, 34.325, 44.775I want to know whether surface temperature is very close to the first layer temperature . I  used this variable and compared the result with modis then found there is difference that is nearly 2 degree .Then  I found the  variable float TH2OSFC(time, lat, lon) ;TH2OSFC:long_name = "surface water temperature" but the result is also bad .Now i just want to know which variable can stand for the surface temperature of lakes . Then i will check the data . Please help me and thanks a lot !

 

[oleson]

You could try looking at "TG", the ground surface temperature, or t_grnd in the code.  I believe it is different from the first layer lake temperature (TLAKE) in most cases.  TG is defined for all surface types and averaged over the grid cell so you would have to request "1d" output from the model to get TG for just lake landunits (hist_dov2xy = .false.).