Approximation of Melet 2013 Fig 4, Using CESM 20-year Avg P2 - J2

Note: Case P2 = "2DPM" with GN tidal energy (giaf.c112.tidal.2DPM.test4)
           Case J2 = giaf.c112.000.br1

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