Objective

Set of bash and nco functions called used to format atmospheric monhtly and daily means into standards from the department (usable by s2dverfication).

Description

The purpose is to standardize EC-Earth atmospheric outputs to make them follow the common netcdf file conventions of the ENSEMBLE project (all members of one variable of one starting date in one file).

While nccf_atm_monhtly uses MMA NetCDF files, nccf_atm_daily directly treats the GRIB files IFS produces. nccf_atm_daily selects daily outputs (every 6 hours for variables with one level and every 12 hours for pressure level variables) before formatting them. 24 basic daily variables are saved for the purpose of performing diagnostics with intraseasonal variability.

Requirements

This package only needs NCO.

Use

First, you have can download the atmosphere_diagnostics project from git: git clone https://earth.bsc.es/gitlab/es/atmosphere_diagnostics.git or just update it from your local directory (git pull origin $your_branch)

nccf_atm_monthly works with a configuration file (config_file-nccf_atm_monthly.bash, available in the git project) that has to be passed as the only argument of the script. This configuration file allows the user to define all the parameters they need: members, leadtimes and variables they want to extract (2d and 3d being separated). If the variable list is left empty, all the variables included in the file will be extracted. When users extend the number of members of an experiment, the script concatenates those members with the previous already post-process members, checking that there is no twice the same members in the output files or that no member was left out.

For daily data, run the script by specifying the experiment id and start date as follows: ./nccf_atm_daily.sh $expid 19601101 # where $expid is the experiment id and "19601101" is the start date; the script will postprocess all the GRIB files for this start date. The different parameters (variables to be extracted, leadtime, members...) still have to be specified at the top of the script.

The outputs will be respectively saved at /esnas/exp/ecearth/$expid/monthly_mean and /esnas/exp/ecearth/$expid/daily.

Processed variables

By default this is the list of variable that will be post-processed by nccf_atm_monthly and nccf_atm_daily.

Surface variables

Daily/Monthly	Short Name	Long name	Unit
Daily/Monthly	tas	near surface temperature	K
Daily/Monthly	tos	sea surface temperature	K
Daily/Monthly	prlr	total precipitation	m s-1
Daily/Monthly	psl	mean sea level pressure	Pa
Daily/Monthly	rss	surface net download shortwave flux	W s-2
Daily/Monthly	rls	surface net download longwave flux	W s-2
Daily/Monthly	rsds	solar radiation incident at the surface	W s-2
Daily/Monthly	rlds	longwave radiation incident at the surface	W s-2
Daily/Monthly	hfssd	surface downward sensible heat flux	W s-2
Daily/Monthly	hflsd	surface downward latent heat flux	W s-2
Daily	tdps	near-surface dewpoint temperature	K
Daily	uas	near-surface zonal wind positive to the east	m s-1
Daily	vas	near-surface meridional wind positive to the north	m s-1
Daily	rst	difference of solar radiation from above and from below at the top of the atmosphere	W s-2
Daily	rlut	difference of longwave radiation from above and from below at the top of the atmosphere	W s-2
Daily	snld	snow depth in metres of water equivalent	m
Daily	evlwr	moisture flux into the surface from the atmosphere	m s-1
Daily	ts	surface temperature	K
Daily	clt	cloud area fraction for the whole atmosphere column	none

Pressure level variables

Daily/Monthly	Short Name	Long name	Unit
Daily/Monthly	ta	air temperature	K
Daily/Monthly	ua	zonal wind positive to the east	m s-1
Daily/Monthly	va	meridional wind positive to the north	m s-1
Daily/Monthly	g	geopotential	m2 s-2
Daily	hus	mass fraction of water vapor in moist air	kg kg-1

Contact

The coordinators of this project are @pabretonniere and @jvegas

Style Guide

You must follow the bash style guide for the department. It is available at https://earth.bsc.es/wiki/doku.php?id=tools:style_guides:bash