Generate JRA-55 relative humidity forcing file

This repository contains code to create a JRA-55 relative humidity input file from the provided specific humidity fields. This is intended to be used when one wants to provide relative humidity as a forcing field instead of specific humidity (e.g. to keep the relative humidity constant when applying an air temperature perturbation).

The make_rhuss.py file creates the relative humidity file from the JRA-55 specific humidity file. Currently this is setup to convert only the RYF 1990-1991 file, but is easy to generalise.

Usage:

On an interactive job on Gadi:

qsub -I -X -P e14 -q express -l mem=32GB -l storage=gdata/hh5+gdata/ik11+gdata/e14

run the following:

module use /g/data3/hh5/public/modules
module load conda/analysis3-unstable

python3 make_rhuss.py

To use this properly the required configuration changes are:

• Use a CIC5 executable which includes the updated code (COSIMA/cice5#59).

• change qair_i to relh_i in ice/input_ice.nml

• change qair_ai qair_i to relh_ai relh_i in namcouple