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Radiative balance in F_2000_C5 compset

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wagmanbe@...
Radiative balance in F_2000_C5 compset

Hi All, I wonder whether the radiative imbalance (RESTOM) of about +2 Wm^-2 in the F_2000_C5 compset is expected, or indicative of some kind of problems with my run. I am observing only small fluctuations from a mean of about 2 Wm^-2  consistently for each year, even after running for 30 years, for 1 degree FV. 

If this is indeed high, does anyone know the targeted or desired radiative imbalance for an F2000 compset? I thought was about + 0.75 Wm^-2. 

 

 

andrew

+2 Wm-2 is about right for an F2000 case with CAM5, 1 deg FV.  The tuning may be slightly different than the coupled system, and the coupled system is run to balance. But we do not necessarily expect the stand alone model with specified SSTs to have a set imbalance in present day. Some models are tuned for this, but CESM is not: it is tuned for performance of the pre-industrial coupled system. CAM in F2000 typically is a bit positive, and 2Wm-2 sounds reasonable.

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