Fig. 3: Long term trend of surface mass concentrations of particulate organic nitrogen (PON).
From: Long term decline of the planktonic biomass in a hotspot of nitrogen fixation
a Significant monotonic trend in % per year (seasonal Kendal test, p-value < 0.05) of surface aph(442) algorithm-derived PON concentrations. b Regional averaged Census X-11 component of the seasonal term (mg m-3) and (c) of the trend-cycle term (mg m-3). The shaded area around the line represents the inter-pixel variability at a given date, and not the statistical uncertainty of the trend estimate.
