Time series

In addition to the general 2-D and 3-D output, GEM/GEMCLIM can output time series at selected grid points (stations).

Requesting time series

A few parameters need to be added to the config-file 'gemclim_settings.nml' to output time series. These parameters are are part of the namelist 'gem_cfgs':

Xst_statij	stations chosen at grid points (i,j) for time-series (always in pairs), i.e.: 82, 43, 83, 43,
Xst_statll	stations chosen at (lat,lon) for time-series (always in pairs)
P_serg_srwri	number of time steps between time-series writeout
P_serg_srsus_L	.true. for time-series requested
P_serg_srsrf_s	List of 2-D variables, i.e.: 'NF','TS',
P_serg_srprf_s	List of 3-D variables => profiles, i.e.: 'TT','UU','VV',
P_serg_serstp	times series package stops at this time step 'P_serg_serstp'. Default 99999999

Note: Whenever asking for accumulators in time series output, one needs to also ask for them as 2-D fields in the regular output in the file 'outcfg.out' with the same output frequency. Otherwise they will never get reset to zero but accumulate forever!

Looking at time series

Although the time series are written in RPN standard format you will not be able to look at them with 'xrec' or to use 'r.diag' or 'editfst'. But you can have a look at the content using 'voir'.

There is also a program called 'ts2tab' which converts the RPN standard file time series into ASCII files.

Author: Katja Winger
Last update: June 2008