NOAA Geophysical Fluid Dynamics Laboratory Climate Model Version 2.1

From The New GFDL Global Atmosphere and Land Model AM2–LM2: Evaluation with Prescribed SST Simulations

"The land model LM2 is based on the Land Dynamics (LaD) model described in detail by Milly and Shmakin (2002, hereinafter MS02). At unglaciated land points, water may be stored in three lumped reservoirs: snowpack, soil water (representing the plant root zone), and ground water."

"Second, the Caspian Sea is now treated as a special land surface type. This is necessary since the Caspian Sea is not included as part of the ocean model, and there is no lake model within LM2.0." - from GFDL’s CM2 Global Coupled Climate Models. Part I: Formulation and Simulation Characteristics 

see also fig 2 that shows no SSTs in Great Lakes region