Dear Michael et al.
The slaboc option is quite straightforward to use .
1) Build a climatology of q-fluxes ( compensating for the
deviation of the SST calculated using a simple mixed layer energy
budget , and the observations you force normally the model with
e.g OISST) :
you do a first simulation using
islab_ocean=1
in physicsparam
and
&slabocparam
do_restore_sst = .true.
do_qflux_adj = .false.
This will produce a monthly q-flux file in your input
directory call domname_SOM.YYYYMMDDHH.nc. You need at least to run
one year to have a complete annual cycle, but it is advised to run
for several year to build a proper climatology. In this run the
slaboc SST are restored to observations , so it should be close to
run with purely forces SST. If you check it you should see
normally the bigger value of q-fluxes ( +or -)where the slab-ocean
prognostic SST are diverging strongly from reality, i.e. where the
ocean dynamic plays a lot in determining SST 's, e.g upwelling
regions.
Then you can proceed to "adjusted runs" runs where you will use
the SST calculated from the slab ocean energy budget accounting
fro the corrective energy fluxes saved in phase one ( the q flux
basically drives the seasonal cycle insuring your SST stays
realistic, while allowing shorter time intearctions with the
atmosphere) ..
islab_ocean=1
in physicsparam
and
&slabocparam
do_restore_sst = .false.
do_qflux_adj = .true.
Typically you run a control "adjusted" run, and then some
experiment "adjusted" runs where you modify e.g. landuse,
aerosol, convection schemes, etc .
Overall this is simple to operate ,the inconvenient is that you
need to perform one more run to produces a reference q-flux
climatology ..it has also been tested mostly over the Indian
domain .
Good to know, there are some parameters that might be sensitive (
but never really tested ) in the slaboc . e.g. the time scale for
restoring ( fixed to five days ) , or the depth of the mixed layer
( fixed to 50m) . We have a monthly climatology of global mixed
layer depth that would be good to use, but never had time to
integrate this ...
Fabien
On 11/11/15 16:40, Michael Notaro wrote:
Is there any documentation on how to run RegCM4 with the slab
ocean model option?
I found minimal discussion in the gforge documents (e.g.
user's guide) and a brief discussion in the following article.
http://www.atmos-chem-phys.net/15/8051/2015/acp-15-8051-2015.pdf
Is the RegCM4-slab ocean model running without any issues and
is it straightforward to use?
Thanks, Michael
Michael Notaro
Associate Director
Nelson Institute Center for Climatic Research
University of Wisconsin-Madison
Phone: (608) 261-1503
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