Wu, J., Boyle, E., Sunda, W. & Wen, L. S. Soluble and colloidal iron in the oligotrophic North Atlantic and North. Pacific. Science 293, 847–849 (2001).
Kuma, K., Nishioka, J. & Matsunaga, K. Controls on Iron(III) hydroxide solubility in seawater: The influence of pH and natural organic chelators. Limnol. Oceanogr. 41, 396–407 (1996).
Tagliabue, A. et al. The integral role of iron in ocean biogeochemistry. Nature 543, 52–59 (2017).
Boyd, P. W. & Ellwood, M. J. The biogeochemical cycle of iron in the ocean. Nat. Geosci. 3, 675–682 (2010).
Tagliabue, A., Aumont, O. & Bopp, L. The impact of different external sources of iron on the global carbon cycle. Geophys. Res. Lett. 41, 920–926 (2014).
Johnson, K. S., Gordon, R. M. & Coale, K. H. What controls dissolved iron concentrations in the world ocean? Mar. Chem. 57, 137–161 (1997).
Duce, R. A. & Tindale, N. W. Atmospheric transport of iron and its deposition in the ocean. Limnol. Oceanogr. 36, 1715–1726 (1991).
Hassler, C. S., van den Berg, C. M. G. & Boyd, P. W. Toward a Regional Classification to Provide a More Inclusive Examination of the Ocean Biogeochemistry of Iron-Binding Ligands. Front. Mar. Sci. 4, 19 (2017).
Gledhill, M. & Buck, K. N. The organic complexation of iron in the marine environment: a review. Front. Microbiol. 3, 69.
Benner, R. Loose ligands and available iron in the ocean. Proc. Natl. Acad. Sci. USA 108, 893–894 (2011).
Boiteau, R. M. et al. Siderophore-based microbial adaptations to iron scarcity across the eastern Pacific Ocean. Proc. Natl. Acad. Sci. USA 113, 14237–14242 (2016).
Aiken, G. R., McKnight, D. M., Wershaw, R. L. & MacCarthy, P. Humic substances in soil, sediment and water: Geochemistry, isolation and characterization (John Wiley & Sons, New York, 1985).
Coble, P. G. Characterization of marine and terrestrial DOM in seawater using excitation – emission matrix spectroscopy. Mar. Chem. 51, 325–346 (1996).
Yamashita, Y. & Tanoue, E. Chemical characterization of protein-like fluorophores in DOM in relation to aromatic amino acids. Mar. Chem. 82, 255–271 (2003).
Coble, P. G., Lead, J., Baker, A. Reynolds, D. M. & Spencer, R. G. M. Aquatic Organic Matter Fluorescence (Cambridge University Press, New York, 2014).
Jaffé, R., Cawley, K. M. & Yamashita, Y. In Advances in the Physicochemical Characterization of Dissolved Organic Matter: Impact on Natural and Engineered Systems (ed. Rosario-Ortiz, F.) 27–73 (American Chemical Society, 2014).
Boyd, P. W., Ibisanmi, E., Sander, S., Hunter, K. A. & Jackson, G. A. Remineralization of upper ocean particles: implications for iron biogeochemistry. Limnol. Oceanogr. 55, 1271–1288 (2010).
Yamashita, Y. & Tanoue, E. Production of bio-refractory fluorescent dissolved organic matter in the ocean interior. Nat. Geosci. 1, 579–582 (2008).
Jørgensen, L. et al. Global trends in the fluorescence characteristics and distribution of marine dissolved organic matter. Mar. Chem. 126, 139–148 (2011).
Catalá, T. S. et al. Turnover time of fluorescent dissolved organic matter in the dark global ocean. Nat. Commun. 6, 5986 (2015).
Tani, H. et al. Iron(III) hydroxide solubility and humic-type fluorescent organic matter in the deep water column of the Okhotsk Sea and the northwestern North Pacific Ocean. Deep-Sea Res. Part I 50, 1063–1078 (2003).
Takata, H. et al. Comparative vertical distributions of iron in the Japan Sea, the Bering Sea, and the western North Pacific Ocean. J. Geophys. Res. 110, C07004 (2005).
Kitayama, S. et al. Controls on iron distributions in the deep water column of the North Pacific Ocean: Iron(III) hydroxide solubility and marine humic-type dissolved organic matter. J. Geophys. Res. 114, C08019 (2009).
Yamashita, Y. et al. Fluorescence characteristics of dissolved organic matter in the deep waters of the Okhotsk Sea and the northwestern North Pacific Ocean. Deep-Sea Res. Part II 57, 1478–1485 (2010).
Misumi, K. et al. Humic substances may control dissolved iron distributions in the global ocean: Implications from numerical simulations. Glob. Biogeochem. Cycle 27, 450–462 (2013).
Nishioka, J. et al. Iron supply to the western subarctic Pacific: Importance of iron export from the Sea of Okhotsk. J. Geophys. Res. 112, C10012 (2007).
Nishioka, J. et al. Intensive mixing along an island chain controls oceanic biogeochemical cycles. Glob. Biogeochem. Cycle 27, 920–929 (2013).
Nakamura, T., Awaji, T., Hatayama, T., Akitomo, K. & Takizawa, T. Tidal exchange through the Kuril Straits. J. Phys. Oceanogr. 30, 1622–1644 (2000).
Yamamoto, M., Watanabe, S., Tsunogai, S. & Wakatsuchi, M. Effects of sea ice formation and diapycnal mixing on the Okhotsk Sea intermediate water clarified with oxygen isotopes. Deep-Sea. Res. Part I 49, 1165–1174 (2002).
Yamamoto-Kawai, M., Watanabe, S., Tsunogai, S. & Wakatsuchi, M. Chlorofluorocarbons in the Sea of Okhotsk: Ventilation of the intermediate water. J. Geophys. Res. 109, C09S11 (2004).
Yasuda, I. et al. Hydrographic structure and transport of the Oyashio south of Hokkaido and the formation of North Pacific Intermediate Water. J. Geophys. Res. 106, 6931–6942 (2001).
Ohshima, K. I., Wakatsuchi, M., Fukamachi, Y. & Mizuta, G. Near-surface circulation and tidal currents of the Okhotsk Sea observed with satellite-tracked drifters. J. Geophys. Res. 107, 3195 (2002).
Mopper, K. et al. Photochemical degradation of dissolved organic carbon and its impact on the oceanic carbon cycle. Nature 353, 60–62 (1991).
Omori, Y., Hama, T., Ishii, M. & Saito, S. Vertical change in the composition of marine humic-like fluorescent dissolved organic matter in the subtropical western North Pacific and its relation to photoreactivity. Mar. Chem. 124, 38–47 (2011).
Helms, J. R. et al. Photochemical bleaching of oceanic dissolved organic matter and its effect on absorption spectral slope and fluorescence. Mar. Chem. 155, 81–91 (2013).
Hayase, K. & Shinozuka, N. Vertical distribution of fluorescent organic matter along with AOU and nutrients in the equatorial Central Pacific. Mar. Chem. 48, 283–290 (1995).
Yamashita, Y., Tsukasaki, A., Nishida, T. & Tanoue, E. Vertical and horizontal distribution of fluorescent dissolved organic matter in the Southern Ocean. Mar. Chem. 106, 498–509 (2007).
Wong, C. S., Matear, J., Freeland, H. J., Whitney, F. A. & Bychkov, A. S. WOCE line P1W in the Sea of Okhotsk. 2. CFCs and the formation rate of intermediate water. J. Geophys. Res. 103, 15625–15642 (1998).
Itoh, M., Ohshima, K. I. & Wakatsuchi, M. Distribution and formation of Okhotsk Sea Intermediate Water: An analysis of isopycnal climatological data. J. Geophs. Res. 108, 3258 (2003).
Warner, M., Bullister, J. L., Wisegarver, D. P., Gammon, R. H. & Weiss, R. F. Basin -wide distributions of chlorofluorocarbons CFC-11 and CFC-12 in the North Pacific: 1985-1989. J. Geophys. Res. 101, 20525–20542 (1996).
Takata, H. et al. Spatial variability of iron in the surface water of the northwestern North Pacific Ocean. Mar. Chem. 86, 139–157 (2004).
Heller, M. I., Gaiero, D. M. & Croot, P. L. Basin scale survey of marine humic fluorescence in the Atlantic: Relationship to iron solubility and H2O2. Glob. Biogeochem. Cycle 27, 88–100 (2013).
Lohan, M. C. & Bruland, K. W. Elevated Fe(II) and dissolved Fe in hypoxic shelf waters off Oregon and Washington: An enhanced source of iron to coastal upwelling regimes. Environ. Sci. Technol. 42, 6462–6468 (2008).
Jones, M. E., Beckler, J. S. & Taillefert, M. The flux of soluble organic-iron(III) complexes from sediments represents a source of stable iron(III) to estuarine waters and to the continental shelf. Limnol. Oceanogr. 56, 1811–1823 (2011).
Nishioka, J. et al. Size fractionated iron distributions and iron-limitation processes in the subarctic NW Pacific. Geophys. Res. Lett. 30, 1730 (2003).
Nishioka, J. et al. Quantitative evaluation of iron transport processes in the Sea of Okhotsk. Prog. Oceanogr. 126, 180–193 (2014).
Fitzsimmons, J. N. et al. Iron persistence in a distal hydrothermal plume supported by dissolved–particulate exchange. Nat. Geosci. 10, 195–201 (2017).
Fitzsimmons, J. N. et al. Partitioning of dissolved iron and iron isotopes into soluble and colloidal phases along the GA03 GEOTRACES North Atlantic Transect. Deep-Sea Res. Part II 116, 130–151 (2015).
Hioki, N. et al. Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean. Sci. Rep. 4, 6765 (2014).
Kondo, Y. et al. Transport of trace metals (Mn, Fe, Ni, Zn and Cd) in the western Arctic Ocean (Chukchi Sea and Canada Basin) in late summer 2012. Deep-Sea Res. Part I 116, 236–252 (2016).
Chen, M. et al. Production of fluorescent dissolved organic matter in Arctic Ocean sediments. Sci. Rep. 6, 39213 (2016).
Nishioka, J., Ono, T., Saito, H., Sakaoka, K. & Yoshimura, T. Oceanic iron supply mechanisms which support the spring diatom bloom in the Oyashio region, western subarctic Pacific. J. Geophys. Res. 116, C0202 (2011).
Weiss, R. F. The solubility of nitrogen, oxygen and argon in water and seawater. Deep-Sea Res. 17, 721–735 (1970).
Obata, H., Karatani, H. & Nakayama, E. Automated determination of iron in seawater by chelating resin concentration and chemiluminescence detection. Anal. Chem. 65, 1524–1528 (1993).
Johnson, K. S. et al. Developing standards for dissolved iron in seawater. EOS 88, 131–132 (2007).
Lawaetz, A. J. & Stedmon, C. A. Fluorescence intensity calibration using the Raman scatter peak of water. Appl. Spectrosc. 63, 936–940 (2009).
Cory, R. M., Miller, M. P., McKnight, D. M., Guerard, J. J. & Miller, P. L. Effect of instrument-specific response on the analysis of fulvic acid fluorescence spectra. Limnol. Oceanogr.: Methods 8, 67–78 (2010).
Tanaka, K., Kuma, K., Hamasaki, K. & Yamashita, Y. Accumulation of humic-like fluorescent dissolved organic matter in the Japan Sea. Sci. Rep. 4, 5292 (2014).
Schlitzer, R. Ocean Data View, http://odv.awi.de (2018).
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