We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Model-Based Analysis of the Oxygen Budget in the Black Sea Water Column.
- Authors
Novikov, Matvey; Pakhomova, Svetlana; Berezina, Anfisa; Yakushev, Evgeniy
- Abstract
Climate change and anthropogenic impacts drastically affect the biogeochemical regime of the Black Sea, which contains the largest volume of sulphidic water in the world. The Sea's oxygen inventory depends on vertical mixing that transports dissolved oxygen (DO) from the upper euphotic layer to deeper layers and on dissolved oxygen consumption for the oxidation of organic matter (OM) and reduced species of S, Fe, and Mn. Here we use a vertical one-dimensional transport model, 2DBP, forced by Copernicus data, that was coupled with the FABM-family N-P-Si-C-O-S-Mn-Fe Bottom RedOx Model BROM. The research objective of this study was to analyze the oxygen budget in the upper 350 m of the Sea and demonstrate the role of the parameterization of the acceleration of the sinking of particles covered by precipitated Mn(IV). The analysis of the oxygen budget revealed distinct patterns in oxygen consumption within different depths. In the oxic zone, the primary sink for DO is the mineralization of organic matter, whereas in the suboxic zone, dissolved Mn(II) oxidation becomes the predominant sink. The produced Mn(IV) sinks down and reacts with hydrogen sulphide several meters below, making possible the existence of the suboxic layer without detectable concentrations of DO and H2S.
- Subjects
VERTICAL mixing (Earth sciences); ANTHROPOGENIC effects on nature; EFFECT of human beings on climate change; BUDGET; HYDROGEN sulfide
- Publication
Water (20734441), 2024, Vol 16, Issue 17, p2380
- ISSN
2073-4441
- Publication type
Article
- DOI
10.3390/w16172380