Triangular Plot

Triangular Plot - a map that graphically depicts the ratios of the three variables as positions in an equilateral triangle.

http://www.pmel.noaa.gov/maillists/tmap/ferret_users/fu_2007/msg00384.html

http://www.pmel.noaa.gov/maillists/tmap/ferret_users/fu_2007/jpgCqrZqdDwYG.jpg