Ocean margins as a significant source of organic matter to the deep open ocean
Article Abstract:
Continental shelves and slopes are proposed as a significant source of the organic matter that feeds respiration in the deep open ocean. Previous studies of carbon fluxes have failed to consider the potential function of suspended particulate organic carbon (POC) and dissolved organic carbon (DOC) in the process. A new study shows that both continental slope and rise waters contain higher DOC and POC levels than the adjacent North Pacific and North Atlantic central gyres. It is suggested that inputs from ocean margins may be a contributory factor in the apparent old age of organic carbon in the deep open ocean.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Isotopic constraints on carbon exchange between deep ocean sediments and sea water
Article Abstract:
Analysis of sediments collected from two regions of the eastern North Pacific Ocean helps determine the distribution of 14C and 13C in dissolved organic and inorganic carbon in sediment pore water, and in particulate sedimentary organic carbon. Carbon exchange between deep ocean sediments and sea water is significantly influenced by the concentration gradients of dissolved organic and inorganic carbon in the sediment-water interface. Level of 14C in dissolved organic carbon fraction in sediments is higher than that in the overlying sea water.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Variable ageing and storage of dissolved organic components in the open ocean
Article Abstract:
The variable ageing and storage of dissolved organic components in the open ocean is shown by studying the carbohydrate-like and protein-like substances in the open Atlantic and Pacific oceans, which are significantly aged but show the presence of younger fractions of the dissolved organic matter (DOM) and lipophilic materials. It is seen that the small dissolved molecules are highly aged forms of organic matter and directly link oceanic organic matter age and size with reactivity.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
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