1. ARCHER User Guide. http://www.archer.ac.uk/documentation/user-guide/
2. Centre for Environmental Data Analysis. http://www.ceda.ac.uk/
3. clock. http://pubs.opengroup.org/onlinepubs/009695399/functions/clock.html
4. CMIP6. http://www.wcrp-climate.org/wgcm-cmip/wgcm-cmip6
5. h5netcdf 0.2.2. https://pypi.python.org/pypi/h5netcdf/