Marine Dissolved Organic Matter and the Carbon Cycle
نویسندگان
چکیده
منابع مشابه
Temperature Dependence of Photodegradation of Dissolved Organic Matter to Dissolved Inorganic Carbon and Particulate Organic Carbon
Photochemical transformation of dissolved organic matter (DOM) has been studied for more than two decades. Usually, laboratory or "in-situ" experiments are used to determine photodegradation variables. A common problem with these experiments is that the photodegradation experiments are done at higher than ambient temperature. Five laboratory experiments were done to determine the effect of temp...
متن کاملHidden cycle of dissolved organic carbon in the deep ocean.
Marine dissolved organic carbon (DOC) is a large (660 Pg C) reactive carbon reservoir that mediates the oceanic microbial food web and interacts with climate on both short and long timescales. Carbon isotopic content provides information on the DOC source via δ(13)C and age via Δ(14)C. Bulk isotope measurements suggest a microbially sourced DOC reservoir with two distinct components of differin...
متن کاملDepth-dependent photodegradation of marine dissolved organic matter
1 Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, CA, USA, 2 Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, USA, 3 Department of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA, 4 Bermuda Institute of Ocean Sciences, St. George’s, Bermuda, 5 Ecosystems Center, Marine Biological Laborat...
متن کاملExperimental Evidence for Abiotic Sulfurization of Marine Dissolved Organic Matter
Dissolved organic sulfur (DOS) is the largest pool of organic sulfur in the oceans, and as such it is an important component of the global sulfur cycle. DOS in the ocean is resistant against microbial degradation and turns over on a millennium time scale. However, sources and mechanisms behind its stability are largely unknown. Here, we hypothesize that in sulfate-reducing sediments sulfur is a...
متن کاملBlack Carbon in Estuarine and Coastal Ocean Dissolved Organic Matter
We measured black carbon (BC) in ultrafiltered, high–molecular weight dissolved organic matter (UDOM) in surface waters of Delaware Bay, Chesapeake Bay, and the adjacent Atlantic Ocean (U.S.A.) to investigate the importance of riverine and estuarine dissolved organic matter (DOM) as a source of BC to the ocean. BC was 5– 72% of UDOM-C (27 6 17%), which corresponds to 8.9 6 6.5% of dissolved org...
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ژورنال
عنوان ژورنال: Oceanography
سال: 2001
ISSN: 1042-8275
DOI: 10.5670/oceanog.2001.05