- Gill A. E., 1980: Some simple solutions for heat-induced tropical circulation. Quart. J. Roy. Meteor. Soc., 106 (449), 447--462.
- gill.ncl: parameters and functions representing solutions
- plot.ncl: plot (u, v) in vectors w in shades and pressure in contours
- plot_panel.ncl: w and p superimposed by (u, v) in vector in seperate panels
- plot_hadley.ncl: plot Hadley circulation
- plot_walker.ncl: plot Walker circulation