Station groups and locations Average POC total flux POCPIC POCBSi POClith POCresidual n Iceland (Ice) 235.60 0.20 0.26 0.12 0.48 28 PAP (PA) 103.59 0.55 0.78 -0.27 -0.04 8 Atlantic gyres (AG) 67.29 0.45 0.17 -0.05 0.44 7 Crozex (Cro) 156.45 -0.11 0.39 0.05 0.80 12 All sites 177.71 0.21 0.35 0.03 0.47 55