SurfaceVolume_MaxSum[m3](grid_y, grid_x): Sum across spill scenarios of max oil volume in time for each grid cell within an individual spill scenario. The maximum oil volume in time represents a metric for the greatest oil volume at each location for an individual spill scenario. Adding this value across spill scenarios puts us in the position of diving by total number of spills to represent locations where, on average, the instantaneous oil exposure is expected to be greatest.

[SusanEAllen]

[SusanEAllen]

Again, this distribution should probably be log transformed.