Difference between revisions of "8. Retrieve historical ECMWF fields (ERA40) for FLEXPART"

Revision as of 14:50, 26 October 2012

Retrieving ECMWF historcal grid data (example for ERA_40):

1) Make sure your ECtrans setup settings on: https://ecaccess.ecmwf.int/ is valid.

2) When ssh'ing onto username@eceaccess.ecmwf.int Choose: ecgate % Choose c1a (not ecgate) upon login to access the supercomputer facility (HPCE)

3) The files you need to extract ERA_40can be found e.g. /home/ms/no/sb1d/flex_extract_ecgate_V4, copy this directory.

4) The files that need editing is:

seq_control.V4 -executes seq_extract.V4 for the dates you put in. ./seq_extract.V4 1990 1990 06 06 20 31 1

-start_year end_year start_month end_month start_day end_day 1=complete day(s)

flex_ecmwf_91_global_ecgate_ERA-40

- line 1592 edit path: echo "Finished Job" > /home/ms/no/sb1d/flex_extract_ecgate_V4/finished.PID

5) cp flex_ecmwf_91_global_ecgate_ERA-40 extract_ecmwf_ftpbase

6) start the job by ./submit (This should put the files in your predefined download folder?)

Thats as far as i get :( I only get:

/home/ms/no/sb9/flex_extract_ecgate_V4/seq_control.V4[3]: ./seq_extract.V4: 0403-006 Execute permission denied.

%List of files: %flex_ecmwf_91_finegrid_* %extract_ecmwf_ftpbase %seq_extract.V4* %seq_control.V4* %submit*

%1. Edit the times in the file: seq_control.V4* %./seq_extract.V4 1990 1990 06 06 29 29 1

2. In file flex_ecmwf_91_finegrid_* modify the following parameters:

M_GRID 20 (resolution 0.2 deg, for resolution of e.g. 10 deg use 1000)

M_LEFT -3600 (36 W)

M_LOWER 4000 (40 N)

M_UPPER 7600 (76 N)

M_RIGHT 3600 (36 E)

M_FORMAT GRIB2 (GRIB1 or GRIB2)

DESTINATION nina (or another MS association set up on the web interface, e.g flexpart)

ECFSDIR ectmp:/${USER}/GRIM/ (directory name)

SOURCECODE /home/ms/no/sb9/flex_extract_ecgate_V4 (your username)

3. Change all paths to refer to your own user grep sb9 * to list all files containing the path with user sb9 which need to be changed.

4. Copy the template file flex_ecmwf_91_finegrid_* to extract_ecmwf_ftpbase

5. Run the job:

./submit

6. Check your job: llq to see your job in the queue eoj <jobid> provides details on the performance of a running job. (also automatically provided at end of job)

7. Get your files: The retrieved files are automatically transferred to your ecgate account (via ECTRANS) and then to NILU by ftp. (NB: cannot ftp directly from HPCE, but must go via ecgate). If you can’t find your files in your defined NILU-directory, check the directory you specified in flex_ecmwf_91_finegrid_* (ECFSDIR) for where it is temporarily stored on the ECWMF system. Then try ftp it over again using the ftp commands specified previously.