Climate scenarios are stored as files and you can find them in the HeurekaAPI-project in a subfolder named EmbeddedData. When using this function, the ClimateModel control table parameter ApplyClimateResponse will set to true, meaning that simulations will be use the climate response model.

        
var gc = new GrowthCalculator();
compartment.GrowthCalculator = gc;
gc.AddClimateScenario("EmbeddedData\\MPI 4.5.bin");

// or:
gc.AddClimateScenario(ApiClimateScenarioManager.MPI_45_FILE_NAME);