Extended Data Fig. 5: Sectional plots of DFe concentration between the surface and at 500 m in different ocean basins.
From: Microbial iron limitation in the ocean’s twilight zone

a, GEOTRACES GP19 section in the South Pacific Ocean along 170° W. b, GEOTRACES GP16 section in the equatorial Pacific Ocean along 10–15° S. c, GEOTRACES GN01 section in the Arctic Ocean along 140° W–180° E. d, GEOTRACES GA03 section in the North Atlantic Ocean along 15–40° N. e, GEOTRACES GI04 section in the Indian Ocean along 40–85° E. f, GEOTRACES GA10 section in the South Atlantic Ocean along 35–40° S. The data were extracted from GEOTRACES Intermediate Data Product 2017 (ref. 14) and 2021 (ref. 59).