The continental margin is a key source of iron to the HNLC North Pacific Ocean
Lam, Phoebe J.
Bishop, James K. B.
MetadataShow full item record
Here we show that labile particulate iron and manganese concentrations in the upper 500 m of the Western Subarctic Pacific, an iron-limited High Nutrient Low Chlorophyll (HNLC) region, have prominent subsurface maxima between 100–200 m, reaching 3 nM and 600 pM, respectively. The subsurface concentration maxima in particulate Fe are characterized by a more reduced oxidation state, suggesting a source from primary volcagenic minerals such as from the Kuril/Kamchatka margin. The systematics of these profiles suggest a consistently strong lateral advection of labile Mn and Fe from redox-mobilized labile sources at the continental shelf supplemented by a more variable source of Fe from the upper continental slope. This subsurface supply of iron from the continental margin is shallow enough to be accessible to the surface through winter upwelling and vertical mixing, and is likely a key source of bioavailable Fe to the HNLC North Pacific.
Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 35 (2008): L07608, doi:10.1029/2008GL033294.
Showing items related by title, author, creator and subject.
Data file, Continental Margin Program, Atlantic Coast of the United States : vol. 2 sample collection and analytical data Hathaway, John C. (Woods Hole Oceanographic Institution, 1971-02)The purpose of the data file presented below is twofold: the first purpose is to make available in printed form the basic data relating to the samples collected as part of the joint U.S. Geological Survey - Woods Hole ...
Millman, John D.; Manheim, Frank T.; Pratt, Richard M.; Zarudzki, E. F. K. (Woods Hole Oceanographic Institution, 1967-12)In late June and July, 1967, the Deep Submergence Research Vehicle (DSRV) ALVIN, aboard its mother snip, LULU, proceeded from the spring base of operations, Nassau, to its home port of Woods Hole. During this trip, from ...
Anaerobic diagenesis of silica and carbon in continental margin sediments : discrete zones of TCO2 production Berelson, William M.; Prokopenko, Maria; Sansone, F. J.; Graham, A. W.; McManus, Jerry F.; Bernhard, Joan M. (2005-05-10)Pore water profiles of dissolved Si, Ca2+, SO42-, CH4, and TCO2 (Dissolved Inorganic Carbon; DIC) were determined from multicores and gravity cores collected at nine sites off Southern California, the west coast of Mexico, ...