Operating system: Ubuntu. 12.04. April 2012. Canonical Ltd. http://www.ubuntu.com/

Software packages:
- netCDF Operators. 4.4.6. September 2014. netCDF Operators Project. http://sourceforge.net/projects/nco/
- Climate Data Operators. 1.7.0. October 2015. Max Plank Institut fur Meteorologie. Hamburg, Germany. https://code.zmaw.de/projects/cdo
- Python. 2.7.10. May 2015. Python Software Foundation. https://www.python.org/
- Anaconda. 2.0.1. July 2014. Continuum Analytics. Austin, Texas. http://docs.continuum.io/anaconda/
- NumPy. 1.10.1. October 2015. NumPy Developers. http://www.numpy.org/
- SciPy. 0.16.0. July 2015. SciPy Developers. http://www.scipy.org/scipylib/index.html
- xray. 0.5.1. June 2015. xray Developers. http://xray.readthedocs.org/en/stable/
- windspharm. 1.3.1. June 2014. Andrew Dawson. http://ajdawson.github.io/windspharm/
- eofs. 0.5.0. June 2014. Andrew Dawson. http://ajdawson.github.io/eofs/ 
- matplotlib. 1.4.3. July 2015. Matplotlib Development Team. http://matplotlib.org/
- seaborn. 0.6.0. June 2015. Michael Waskom. http://stanford.edu/~mwaskom/software/seaborn/index.html
- iris. 1.8.1. June 2015. Met Office. Exeter, England. http://scitools.org.uk/
- cartopy. 0.13.0. June 2015. Met Office. Exeter, England. http://scitools.org.uk/
