The version V8_1 of SURFEX is a technical version, i.e. it contains only technical and no scientific developments. So its implementation will have no impact on output results.
On a practical point of view, the following differences are noted between version 8_0 and version 8_1: 1) Changes in the namelist OPTIONS.nam 2) Changes in the subroutines doing the interface with the calling atmospheric model 3) Changes in the output fields 4) Changes in the results (…)
This version contains the following novelties: 1) Optimization and MPI parallelisation of the PGD and PREP steps. 2) The general OPEN-MP in the OFFLINE driver is removed. 3) By default, the output written fields are all 1D-fields (there is no longer the dimension PATCH in output files). 4) The (…)
The XRD39 library from the GMAP is replaced by the XRD44. The DRHOOK library is included in the XRD44 library.
These changes include: the names of the observation fields can be given in the namelist (new entry COBS_M in NAM_OBS). The EKF scheme can run with ISBA-DF, and can have WG1, WG2... WG8 as variable fields. No more limitation on Jacobians values (was [-0.1,1]) but on analysis increments instead (…)
If LINTERP_SW (new key in NAM_IO_OFFLINE) is .TRUE., a new time interpolation for the short-wave radiation forcing data is done, taking into account the zenith angle, and allowing not to lost energy anymore.
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