Scales of Spatial Heterogeneity of Plastic Marine Debris in the Northeast Pacific Ocean
A) Microplastic numerical concentration; B) Sea surface temperature; C) Sea surface salinity; D) Sea surface fluorescence. Dots are the values of the empirical semivariogram and the lines are a description of the data trends. A is fitted with a linear model, and B–D with Gaussian models. Data are shown for Summer 2009 only since sample size in Fall 2010 was insufficient for this analysis.