Approximation of Melet 2013 Fig 4, Using CESM 20-year Avg P2 - J3

Note: Case P2 = "2DPM" with GN tidal energy (giaf.c112.tidal.2DPM.test4)
           Case J3 = giaf.c112.000.Nb (time-varying E(x,y,t) = f(Nb)

Note: Fig 4b and 4c consist of a single level, unlike the average shown in Melet