By Dennis A. Hansell, Craig A. Carlson
Curiosity in marine dissolved natural topic (DOM) is especially excessive since it performs a tremendous position in oceanic and worldwide carbon biking, which in flip affects climate. figuring out the techniques excited about the ameliorations of carbon, phosphorus, nitrogen, and different significant components within the oceans has been a first-rate target of marine biogeochemists and oceanographers during the last decade.This publication, in sixteen chapters with over a hundred and seventy figures and tables, stories at the significant advances during this sector by way of a amazing crew of overseas chemical and organic oceanographers. also, it specializes in the position of DOM in elemental biking - the place the best informational desire presently exists. organic biking of the most important components via DOM is classed all through, with specific emphasis at the position of marine microbes as energetic brokers within the processing of this materialThe ocean technology community's advances for inclusion of DOM in either atmosphere and worldwide movement types are evaluated
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Extra resources for Biogeochemistry of Marine Dissolved Organic Matter
Overall differences between DOC concentrations measured by HTCO and persulfate were even greater (~3x overall) for larger size fractions of a surface seawater, with most of the discrepancies occurring in the higher-molecular-weight (>4000 amu) fractions. ,-•'•' J D 4 3025 H 1 1 1 100 1 1 200 1 1 300 DOC, |LiM 1 1 400 1 1 500 1 Figure 8 DON versus DOC in surface waters from the North Pacific and East China Sea (data from Table VII of Sugimura and Suzuki, 1988). The five open squares indicate high-DOC waters with a salinity less than 33 that were collected off the mouth of the Changjiang (Yangtze) River.
Ultimately, however, the biogeochemical usefulness of any class of chemical tracers is limited by its structural diversity (Blumer, 1976) and the range of its sources, input functions, and chemical reactivities (Middelburg, 1989). It is clear, therefore, that the information content of organic molecules, which also carry imbedded stable isotopic signatures and radiochemical clocks, is unsurpassed by any other seawater component. The 10^^ diverse organic molecules dissolved in every milliliter of seawater are the only constituents whose stored information approaches the richness needed to understand where that water has been and what has happened within it over time.
Res. Lab. Memo. Rep. 2852. Gauthier, M. , and Aubert, M. (1981). Chemical telemediators in the marine environment. In "Marine Organic Chemistry" (E. K. Duursma and R. ), pp. 225-257. Elsevier, Amsterdam. Gillam, A. , and Wilson, M. A. (1985). Pyrolysis-GC-MS and NMR studies on dissolved seawater humic substances and isolates of a marine diatom. Org. Geochem. 8, 15-25. Gordon, D. C , and Sutcliffe, W. H. (1973). A new dry combustion method for the simultaneous determination of total organic carbon and nitrogen in seawater.