Table 1 Ranges and average concentration values for DFe, TDFe and nitrate in surface waters of the high latitude North Atlantic (excluding shelf waters).
From: Iron Biogeochemistry in the High Latitude North Atlantic Ocean
Range | Average all (±SD) | Average IRB (±SD) | Average IB (±SD) | t-test (IRB vs IB) | t-test (seasonal comparison IB) | t-test (seasonal comparison IRB) | |
|---|---|---|---|---|---|---|---|
Spring cruise D350 | |||||||
DFe (nM) | BD – 0.98 | 0.209(±0.172) n = 74 | 0.124(±0.056) n = 21 | 0.243(±0.190) n = 53 | P = 0.000 | P = 0.000 | P = 0.156 |
TDFe (nM) | 0.62–23.26 | 3.871(±6.166) n = 42 | 1.454(±1.330) n = 7 | 4.354(±6.640) n = 35 | P = 0.012 | P = 0.012 | P = 0.443 |
NO3 (µM) | 4.94–14.45 | 10.02(±2.39) n = 71 | 12.66(±0.97) n = 20 | 8.99(±1.94) n = 51 | P = 0.000 | P = 0.000 | P = 0.000 |
Summer cruise D354 | |||||||
DFe (nM) | BD – 0.53 | 0.091(±0.197) n = 73 | 0.087(±0.234) n = 48 | 0.099(±0.095) n = 25 | P = 0.377 | ||
TDFe (nM) | 0.358–6.81 | 1.450(±1.424) n = 30 | 1.364(±1.599) n = 20 | 1.623(±1.043) n = 10 | P = 0.299 | ||
NO3 (µM) | BD – 6.47 | 2.25(±1.74) n = 61 | 2.97(±1.57) n = 42 | 0.65(±0.76) n = 19 | P = 0.000 | ||
