Processes controlling the redox budget for the oxic/anoxic water column of the Black Sea

S. K. Konovalov, J. W. Murray, G. W. Luther, Bradley Tebo

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

A one-dimensional isopycnal model has been constructed to simulate 16 major components of the Black Sea biogeochemical structure and to discuss processes controlling the redox budget for the oxic/anoxic water column of the Black Sea. The model includes parameterizations of physical exchange in the water column that takes account of vertical advection and diffusion and lateral exchange between the Black Sea and the Bosporus Plume. The model incorporates parameterizations for 25 biogeochemical processes, which we have found to be important to simulate the redox biogeochemical structure over a period of several decades. Parameterizations for biogeochemical processes follow the principles of formal chemical kinetics. Limiting functions are not applied. Neither physical nor biogeochemical processes are limited to depth or density layers of water, making the generated biogeochemical structure flexible. The redox budget and importance of individual processes for the budget of oxygen, sulfide, nitrate, ammonium, organic matter, manganese and iron are discussed in detail. In particular, we demonstrate that the biogeochemical structure of the oxic and suboxic layer strongly depends on export production and climate-induced variations in ventilation. The redox budget and the biogeochemical structure of the anoxic zone highly depend on the lateral exchange between the Black Sea and the Bosporus Plume, which appears to be the major reason for the existence of the suboxic zone.

Original languageEnglish (US)
Pages (from-to)1817-1841
Number of pages25
JournalDeep-Sea Research Part II: Topical Studies in Oceanography
Volume53
Issue number17-19
DOIs
StatePublished - Aug 2006
Externally publishedYes

Fingerprint

Black Sea
water column
parameterization
plume
water
ammonium nitrate
sulfides
manganese
organic matter
iron
ventilation
climate
oxygen
kinetics
advection
sulfide
budget

ASJC Scopus subject areas

  • Aquatic Science
  • Geology
  • Oceanography

Cite this

Processes controlling the redox budget for the oxic/anoxic water column of the Black Sea. / Konovalov, S. K.; Murray, J. W.; Luther, G. W.; Tebo, Bradley.

In: Deep-Sea Research Part II: Topical Studies in Oceanography, Vol. 53, No. 17-19, 08.2006, p. 1817-1841.

Research output: Contribution to journalArticle

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