The Nature and Distribution of Fluorescent Dissolved Organic Matter in the Black Sea and the Cariaco Trench

1991 ◽  
pp. 361-378 ◽  
Author(s):  
Paula G. Coble ◽  
Robert B. Gagosian
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Black Sea ◽  
The Black Sea ◽  
Fluorescent Dissolved Organic Matter

Characterization of dissolved organic matter in the Black Sea by fluorescence spectroscopy

Nature ◽  
1990 ◽  
Vol 348 (6300) ◽  
pp. 432-435 ◽  
Author(s):  
Paula G. Coble ◽  
Sarah A. Green ◽  
Neil V. Blough ◽  
Robert B. Gagosian
Keyword(s):  
Organic Matter ◽  
Fluorescence Spectroscopy ◽  
Dissolved Organic Matter ◽  
Black Sea ◽  
The Black Sea

scholarly journals Sulfurization of dissolved organic matter in the anoxic water column of the Black Sea

2021 ◽  
Vol 7 (25) ◽  
pp. eabf6199
Author(s):  
Gonzalo V. Gomez-Saez ◽  
Thorsten Dittmar ◽  
Moritz Holtappels ◽  
Anika M. Pohlabeln ◽  
Anna Lichtschlag ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Dissolved Organic Matter ◽  
Water Column ◽  
Black Sea ◽  
Large Scale ◽  
Global Climate ◽  
The Black Sea ◽  
Sulfur Species ◽  
Reduced Sulfur

Today’s oceans store as much dissolved organic carbon (DOC) in the water column as there is CO2 in the atmosphere, and as such dissolved organic matter (DOM) is an important component of the global carbon cycle. It was shown that in anoxic marine sediments, reduced sulfur species (e.g., H2S) abiotically react with organic matter, contributing to carbon preservation. It is not known whether such processes also contribute to preserving DOM in ocean waters. Here, we show DOM sulfurization within the sulfidic waters of the Black Sea, by combining elemental, isotopic, and molecular analyses. Dissolved organic sulfur (DOS) is formed largely in the water column and not derived from sediments or allochthonous nonmarine sources. Our findings suggest that during large-scale anoxic events, DOM may accumulate through abiotic reactions with reduced sulfur species, having long-lasting effects on global climate by enhancing organic carbon sequestration.

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