[Go-essp-tech] How does "experiment=volcanic aerosol" come to be in CMIP5?
Karl Taylor
taylor13 at llnl.gov
Thu Feb 16 13:21:26 MST 2012
Hi Gary,
To be sure, the experiment_id for the CCCMA dataset shown below was (if
correct) "historicalMisc". When they published it, they chose to name
the experiment "volcanic aerosol". This is informational but is not
used by the ESG search engines or in any other automatic processing that
I know of. (I thought whoever was publishing would just put in
experiment="historicalMisc", so it would be consistent with the
experiment_id global attribute.)
I don't think we've provided much guidance about this (outside the DRS
document), but for each different combination of forcings in the
historicalMisc runs, you should assign a different "physics_version"
number (i.e., the "p" in the ensemble identifier, which in the example
below is "p3"). You should also record in the global "forcing"
attribute in the netCDF file each of the forcings included in each of
your historical(Misc) runs. If you do an ensemble of runs with the same
forcing, they should all have the same "p" value and be distinguished by
the "r" values. The standard abbreviations for each forcing are
provided in the last appendix of the DRS document and also can be found
at
http://cmip-pcmdi.llnl.gov/cmip5/docs/cmip5_data_reference_Appendix1-2.pdf
[Note that the output_requirements, available at
http://cmip-pcmdi.llnl.gov/cmip5/docs/CMIP5_output_metadata_requirements.pdf
, describes the "forcing" attribute.]
I would like to put together a table that provides a key showing which
forcings are included for each model and for each value of "p"; I just
haven't gotten to this yet.
Please let me know if you can think of any way to make this clearer to
everyone.
Best regards,
Karl
On 2/16/12 7:31 AM, Gary Strand wrote:
>
> At what point (publishing?) does one of an "historicalMisc" experiment
> (as defined and required by the CMIP5 tables) get displayed as:
>
>
>
> I would like our (NCAR) "historicalMisc" datasets have a bit more
> information available than just the standard (as described in the DRS
> document) "historical simulation but with other individual forcing
> agents or combinations of forcings."
>
> We have a whole slew of variations that are not readily
> distinguishable (and less likely usable) by the above generic description.
>
> Thanks!
>
> Gary Strand
> strandwg at ucar.edu
>
>
>
> _______________________________________________
> GO-ESSP-TECH mailing list
> GO-ESSP-TECH at ucar.edu
> http://mailman.ucar.edu/mailman/listinfo/go-essp-tech
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/go-essp-tech/attachments/20120216/2ffe1726/attachment-0001.html
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 26810 bytes
Desc: not available
Url : http://mailman.ucar.edu/pipermail/go-essp-tech/attachments/20120216/2ffe1726/attachment-0001.png
More information about the GO-ESSP-TECH
mailing list