MITgcm model setup and output for "Improved representation of river runoff in ECCO simulations: implementation, evaluation, and impacts to coastal plume regions"

Seven simulations
    three are conventional ECCO runs with climatology river runoff
        LLC90-Fekete (aka ECCO-V4R4)
        LLC270-Fekete (aka ECCO-LLC270)
        CS510-Stammer (aka ECCO2)
    four are same as above, except for JRA55-DO daily river runoff
        LLC90-JRA55DO
        LLC270-JRA55DO
        LLC540-JRA55DO
        CS510-JRA55DO

PART 1 MODEL SET-UP

============
LLC90-Fekete
============
        https://ecco.jpl.nasa.gov/drive/files/Version4/Release4/doc/v4r4_reproduction_howto.pdf

==============
LLC90-JRA55DO
==============
        similar to LLC90-Fekete except for JRA55DO runoff
        #define CHECK_SALINITY_FOR_NEGATIVE_VALUES @CPP_OPTIONS.h
        river runoff forcing from "LLC90-JRA55DO.tar", pickup from "LLC90-JRA55DO-PICKUP.tar"

       (each "JRA55DO.tar" contains 2015-2017 daily river runoff and "data.exf" for specification of JRA55DO river runoff; each "PICKUP.tar" contains pickup files for starting from 2015/01/01 and "data" for specification of initial conditions and model parameters)

=============
LLC270-Fekete
=============
    https://github.com/MITgcm-contrib/ecco_darwin/blob/master/v04/llc270_JAMES_paper/readme/readme_physics.txt

==============
LLC270-JRA55DO
==============
    https://github.com/MITgcm-contrib/ecco_darwin/blob/master/v05/llc270_jra55do/readme.txt
    river runoff temperature NOT used here:
    #undef  ALLOW_RUNOFTEMP @EXF_OPTIONS.h
    delete "runoftempfile" @data.exf
    river runoff forcing from "LLC270-JRA55DO.tar", pickup from "LLC270-JRA55DO-PICKUP.tar"

==============
LLC540-JRA55DO
==============
    https://github.com/MITgcm-contrib/llc_hires/blob/master/llc_540/readme
    https://github.com/MITgcm-contrib/llc_hires/blob/master/llc_540/readme#L16
    river runoff forcing from "LLC540-JRA55DO.tar", pickup from "LLC540-JRA55DO-PICKUP.tar"

=============
CS510-Stammer
=============
        http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/high_res_cube/cube92/README.cs510?revision=1.11&view=co

=============
CS510-JRA55DO
=============
        similar to CS510-Stammer except for JRA55DO runoff
        #define CHECK_SALINITY_FOR_NEGATIVE_VALUES @CPP_OPTIONS.h
        #define USE_NO_INTERP_RUNOFF @EXF_OPTIONS.h
        river runoff forcing from "CS510-JRA55DO.tar", pickup from "CS510-JRA55DO-PICKUP.tar"

PART 2 MODEL OUTPUT
    LLC###_${river}_SSS.mat
    where ### for 90, 270, or 540
    and ${river} for eight major rivers in the world.
    each "mat" file contains the daily mean SSS over 2015-2017 near the corresponding river.