Documenting the suboxic zone of the Black Sea via high-resolution real-time redox profiling

Brian T. Glazer, George W. Luther, Sergey K. Konovalov, Gernot E. Friederich, Donald B. Nuzzio, Robert E. Trouwborst, Bradley Tebo, Brian Clement, Karen Murray, Alexander S. Romanov

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

We coupled an in situ electrochemical analyzer to a CTD pump profiler system to measure redox species across the oxic-anoxic interface of the Black Sea water column. Voltammetry was performed using gold-amalgam working electrodes to measure simultaneously oxygen and dissolved sulfur species (S8, Sx 2 -, HS-/H2S) both in situ (at 2) were present within the suboxic zone of the southwest Black Sea that are not present in the west-central and northeast Black Sea. Oxygen injection also occurs at other depths throughout the southwest and corresponds with small temperature anomalies, suggesting influence by Bosporus inflow up to 150 km from its entrance to the Black Sea. Such an inflow of oxygen, as well as spatial variations of the halocline, affect both manganese and, subsequently, sulfide oxidation for a large portion of Black Sea intermediate water (H2S onset occured ∼60 m deeper in the southwest as compared to the west-central). In situ voltammetric analyses provided rapid redox information, thus enabling more accurate targeting of specific geochemical features by the CTD rosette package.

Original languageEnglish (US)
Pages (from-to)1740-1755
Number of pages16
JournalDeep-Sea Research Part II: Topical Studies in Oceanography
Volume53
Issue number17-19
DOIs
StatePublished - Aug 2006
Externally publishedYes

Fingerprint

Black Sea
oxygen
sulfides
inflow
pumps
electrodes
gold
manganese
spatial variation
sulfur
seawater
halocline
oxidation
injection
intermediate water
profiler
temperature anomaly
targeting
pump
electrode

Keywords

  • Black Sea
  • In situ voltammetry
  • Oxygen
  • Redox
  • Suboxic
  • Sulfide

ASJC Scopus subject areas

  • Aquatic Science
  • Geology
  • Oceanography

Cite this

Glazer, B. T., Luther, G. W., Konovalov, S. K., Friederich, G. E., Nuzzio, D. B., Trouwborst, R. E., ... Romanov, A. S. (2006). Documenting the suboxic zone of the Black Sea via high-resolution real-time redox profiling. Deep-Sea Research Part II: Topical Studies in Oceanography, 53(17-19), 1740-1755. https://doi.org/10.1016/j.dsr2.2006.03.011

Documenting the suboxic zone of the Black Sea via high-resolution real-time redox profiling. / Glazer, Brian T.; Luther, George W.; Konovalov, Sergey K.; Friederich, Gernot E.; Nuzzio, Donald B.; Trouwborst, Robert E.; Tebo, Bradley; Clement, Brian; Murray, Karen; Romanov, Alexander S.

In: Deep-Sea Research Part II: Topical Studies in Oceanography, Vol. 53, No. 17-19, 08.2006, p. 1740-1755.

Research output: Contribution to journalArticle

Glazer, BT, Luther, GW, Konovalov, SK, Friederich, GE, Nuzzio, DB, Trouwborst, RE, Tebo, B, Clement, B, Murray, K & Romanov, AS 2006, 'Documenting the suboxic zone of the Black Sea via high-resolution real-time redox profiling', Deep-Sea Research Part II: Topical Studies in Oceanography, vol. 53, no. 17-19, pp. 1740-1755. https://doi.org/10.1016/j.dsr2.2006.03.011
Glazer, Brian T. ; Luther, George W. ; Konovalov, Sergey K. ; Friederich, Gernot E. ; Nuzzio, Donald B. ; Trouwborst, Robert E. ; Tebo, Bradley ; Clement, Brian ; Murray, Karen ; Romanov, Alexander S. / Documenting the suboxic zone of the Black Sea via high-resolution real-time redox profiling. In: Deep-Sea Research Part II: Topical Studies in Oceanography. 2006 ; Vol. 53, No. 17-19. pp. 1740-1755.
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