Graph: NCL

Acknowlegement

"NCL is an interpreted language designed specifically for scientific data analysis and visualization" and has been developed by NCAR. Following scripts were constructed based on the knowledge gained from the NCL web site (NCL web page). We thank the development team to make NCL available to us.

Terms and conditions of use

We have no responsibility or liability for any unintended consequences or damages that the use of the following scripts may cause. Please use them at your own risk.

Examples

Time series

Annual mean surface air temperature (Script, Figure)

Latitude plot

Energy balance at the top of atmosphere (Figure)

Longitude-Latitude plot/annimation

Surface air temperature (NCL script, Figure); Precipitation (NCL script, Figure)
Surface air temperature with zonal mean (NCL script); Precipitation with zonal mean (NCL script)

Monthly precipitation animation (Shell script; NCL script)

Polar stereographic plot

September sea ice concentration (NCL script)

* Sea ice concentration data (HadISST.2.2.0.0) were downloaded from here in June 2018.
* Titchner, H. A., and N. A. Rayner (2014), The Met Office Hadley Centre sea ice and sea surface temperature data set, version 2: 1. Sea ice concentrations, J. Geophys. Res. Atmos., 119, 2864-2889, doi: 10.1002/2013JD020316.

Latitude-Pressure plot

Zonal wind (NCL script, Figure; NCL script, Figure)
Meridional stream function

Panel plot

Monthly (NCL script, Figure)
Seasonal (NCL script, Figure)

Statistical significance

difference (NCL script, Figure)
linear trend (NCL script, Figure)

Ice sheet drainage basin mask

Constructing a netCDF mask file from a GIS shapefile: NCL script for NSIDC data, NCL script for NASA/IMBIE data

* Shapefiles were donwloaded from NSIDC and NASA/IMBIE in August 2018.
* A file, shapefile_utils.ncl, is required.

Interpolation

Regular to Gaussian (NCL script for 2D data, NCL script for 3D data)

Colorbar preference

temperature: "temp_19lev", "temp_diff_18lev", "nrl_sirkes", or "ViBlGrWhYeOrRe"
precipitation: "precip_11lev", "precip_diff_12lev", or "CBR_drywet"
Colar bars

Others

Insolation (Figure)
Gregory plot (Figure)
Ocean meridional overturning stream function
Tips
Write large file size in netCDF: setfileoption("nc","Format","LargeFile")