For the preparation of forcing files, specific programs are used and are located in $SRC_SURFEX/src/FORC.
The structure of $SRC_SURFEX/MY_RUN directory part dedicated to forcing looks like: MY_RUN |— DATA | |— Alp_for_0203 | |— Alqueva0206 | |— cdp9697 | |— hapex | |— (…)
Go to $SRC_SURFEX/src and type:
export VER_USER=FORC ./configure . ../conf/profile_surfex-LXgfortran-SURFEX-V7-FORC-MPIAUTO-DEBUG make user
This compile the additional fortran code needed to install a predefined experiment.
Then, go to $SRC_SURFEX/MY_RUN/FORCING and launch: (…)
There are: one ASCII/binary file by atmospheric parameter beginning by Forc_.. one ASCII configuration file named Params_config.txt
The forcing parameters are: Atmospheric temperature: Forc_TA.txt / Forc_TA.bin (K) Atmospheric humidity: Forc_QA.txt / Forc_QA.bin (kg/kg) Atmospheric pression: (…)
There is one file : FORCING.nc
Dimensions: time xx yy
Variables: time(time): units = "minutes since 1986-01-01 00:00:00" (example) FORC_TIME_STEP :forcing time step (s) LON(yy,xx) : longitude (degrees) LAT(yy,xx) : latitude (degrees) ZS(yy,xx): surface orography (m) UREF(yy,xx): reference (…)
Generally, the forcing time step is longer than the model time step.
That is why a linear interpolation is realized for nearly all atmospheric parameters, except for RAIN and SNOW that are set equal to the value at the end of the current forcing time step (that is the mean rate of rain during (…)
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