Thank you very much Graziano. Very nice explanation. It is very helpful to address questions of the RegCM community for setting the latest runs. I'll ask you in case of any further confusion.
Best Regards
Ahsan
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-------- Original message -------- From: Graziano Giuliani <ggiulian@ictp.it> Date: To: Syed Ahsan Ali <ahsanshah01@gmail.com> Cc: regcnet <regcnet@lists.ictp.it> Subject: Re: Running RCPs using CMIP5 data
On 08/12/2013 05:56 PM, Syed Ahsan Ali wrote: > Dear Graziano and all. > > I want to set up RegCM4.3.5.6 for running RCPs with latest CMIP5 data sets. The > directory I have found for downloading CMIP5 data for RegCM is > > *http://clima-dods.ictp.it/data/d8/cordex/CMIP5/daily/* > > Is it correct? Secondly where is the supporting data for these RCPs i.e SSTs, > Topography, Landuse and aerosols? [...]
The input data are in http://clima-dods.ictp.it/data/d8/cordex
You need 6 hourly dataset on vertical levels to have the ICBC for the RegCM, and they are in different directories for the different models we have written ICBC interfaces. The directory structure under cordex reflects the one on disk we use to run (the inpglob in the namelist), so to download data you must respect same structure.
The CMIP5 directory contains instead data used in verifications and evaluation of model characteristics and performances.
Assume for example you want to use HadGEM2 which is UKMO model to drive a regional simulation.
0) Topography and Landuse data for RegCM are unchanged.
http://clima-dods.ictp.it/data/d8/cordex/SURFACE
1) Create the directory SST and HadGEM2 2) In SST download the data from
http://clima-dods.ictp.it/data/d8/cordex/SST
with HadGEM2 in the name:
ts_Amon_HadGEM2-ES************************.nc
3) In HadGEM2, recreate the directory structure:
HadGEM2 _ |-> fixed |-> RF_______ | |-> hus | |-> psl | |-> ta | |-> ua | |-> va | |-> RCP85____ | |-> hus | |-> psl | |-> ta | |-> ua | |-> va | |-> RCP45____ |-> hus |-> psl |-> ta |-> ua |-> va
And download the data in the {hus,psl,ta,ua,va} directories, in case leaving out the unwanted scenario (i.e. you want to run just the RCP8.5 and not the RCP4.5 scenario) and the unwanted period (i.e. look at the dates in the filenames to exclude data).
Then point inpglob to the directory where {HadGEM2,SST} directories are in.
Other option is to directly use the ESG federation servers to download six hourly dataset: note that we have downloaded just the first release (r1i1p1), while some models have already uploaded to the ESG servers new releases of the datasets fixing bugs or updating the model code. In this case, you may probably want to have a look at the ICBC code to modify the file names built at run time by the sst/icbc programs. Another note, we have interfaces ready for only some of the CMIP5 models (the ones in the model code), and albeit we plan to develop in the future a more general pre-processing to avoid re-coding on every GCM model name/content/quirk change, as of now we have other work to do with higher priority, and you are left with fortran code editing :( .
Third, the download and coding of different interfaces has been started by different users here at ICTP, so each model may need data placed in different directory structure. The directory structure on:
http://clima-dods.ictp.it/data/d8/cordex
is anyway the one we use on disk, so replicate it and you should have no problem.
For Aerosol datasets, you must download for the BC the data in the
http://clima-dods.ictp.it/data/d8/cordex/AERGLOB
directory. Again, you may want to download only the scenario you need.
Graziano.
P.S.: Some dataset are still downloading and may not be complete (CNRM RCP8.5 is giving us headaches !!)
-- Graziano Giuliani - Earth System Physics Section The Abdus Salam International Centre for Theoretical Physics Strada Costiera, 11 - I - 34151 Trieste Italy