This section is used for notes on: things that haven't made it into the main version of the manual yet; comments on a version noted after release; bug fixes; informal but useful information; etc.
On surface solar in v2.1 (noted 8/99):
In v2.1, using clrad1, while the net surface solar appears generally close to
such data sets as Darnell et al. (1992), Li et al. (1993) and Bishop and
Rossow (1991), it
does have a systematic bias when run with only 3 cloud types (even when these
are specified from ISCCP). Net surface solar tends to be about 20-30 W/m 
higher than the Darnell et al. dataset over tropical oceans. This was noted
when the QTCM1 was coupled with an ocean model (NCAR upper ocean model)
and tended to have a warm SST bias. Including a term that mimics the average
effects of the omitted "exotic" cloud types (e.g. AsAc), which individually
do not contribute greatly to reflected solar, but tend to add up, and
including aerosols in the Fu-Liou scheme estimation brings the surface
solar into line with the other surface solar estimates. This modification
is not included in the standard v2.1 release. Effects have not been fully
analyzed as of 9/1/99.