Manganese flux from continental margin sediments in a transect through the oxygen minimum

Journal Article · Fri Aug 28 00:00:00 EDT 1992 · Science (Washington, D.C.); (United States)

DOI:https://doi.org/10.1126/science.257.5074.1242· OSTI ID:7270261

Johnson, K S ^[1]; Berelson, W M; Iams, H D; Kilgore, T E ^[2]; Coale, K H; Coley, T L; Elrod, V A; Fairey, W R; Nowicki, J L ^[3]

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1. Moss Landing Marine Lab., CA (United States) Monterey Bay Aquarium Research Inst., Pacific Grove, CA (United States)
2. Univ. of Southern California, Los Angeles (United States)
3. Moss Landing Marine Lab., CA (United States)

The flux of manganese from continental margin sediments to the ocean was measured with a free-vehicle, benthic flux chamber in a transect across the continental shelf and upper slope of the California margin. The highest fluxes were observed on the shallow continental shelf. Manganese flux decreased linearly with bottom water oxygen concentration, and the lowest flux occurred in the oxygen minimum zone (at a depth of 600 to 1,000 meters). Although the flux of manganese from continental shelf sediments can account for the elevated concentrations observed in shallow, coastal waters, the flux from sediments that intersect the oxygen minimum cannot produce the subsurface concentration maximum of dissolved manganese that is observed in the Pacific Ocean.

• OSTI ID: 7270261
• Journal Information: Science (Washington, D.C.); (United States), Vol. 257:5074; ISSN 0036-8075
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CONTINENTAL SHELF
WATER POLLUTION
MANGANESE
ECOLOGICAL CONCENTRATION
SEDIMENTS
CONTAMINATION
CALIFORNIA
COASTAL WATERS
CONTINENTAL MARGIN
DEVELOPED COUNTRIES
ELEMENTS
METALS
NORTH AMERICA
POLLUTION
SURFACE WATERS
TRANSITION ELEMENTS
USA
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)