Identification of the oxic anoxic interface by isopycnal surfaces in the black sea

Date

1993-07-01

Author

SAYDAM, AHMET CEMAL
Tuğrul, Süleyman
BAŞTÜRK, ÖZDEN
Oğuz, Temel

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

220
views

0
downloads

The analysis of hydrochemical data collected in the Black Sea since 1987 shows that the upper boundary of the oxic/anoxic interface zone coincides with the nitrate maximum at the depths of sigma(t) congruent-to 15.40 +/- 0.10 isopycnal surface. Its lower boundary corresponds to the phosphate maximum depth at sigma(t) congruent-to 16.20 +/- 0.05 isopycnal surface, independent of the geographical location and season. In the absence of the continuous pump cast measurement system, and when the oxygen and sulphide concentrations are too low to be measured with sufficient precision within the interface zone, such features of the oxygen-nitrate and H2S-phosphate correlations at specific density levels provide a direct and practical way to identify the oxic/anoxic interface zone. This, in turn, allows for a more precise and systematic water sampling for studying the complex biogeochemistry of the layer.

Subject Keywords

Aquatic Science, Oceanography

URI

https://hdl.handle.net/11511/58052

Journal

Deep-Sea Research Part I-Oceanographic Research Papers

DOI

https://doi.org/10.1016/0967-0637(93)90119-n

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

The role of mesoscale processes controlling biological variability in the Black Sea coastal waters: inferences from SeaWIFS-derived surface chlorophyll field Oguz, T; Deshpande, AG; Malanotte-Rizzoli, P (Elsevier BV, 2002-06-01) Several different time series of chlorophyll images from the 1997-2000 Seaviewing, Wide Field-of-view Sensor data set have been analysed to gain a perspective on the dynamical and biological variability in the Black Sea, particularly oil its northwestern shelf region and along the Anatolian coastal zone. The images are interpreted in terms of documenting the close link between biological production and physical dynamics of the boundary system, and of emphasizing the role of eddy processes on controlling mes...
Assessment of temporal variation and sources of PCBs in the sediments of Mediterranean Sea, Mersin Bay, Turkey Gedik, Kadir; İmamoğlu, İpek (Elsevier BV, 2011-01-01) Information on temporal distribution of polychlorinated biphenyls (PCBs) in the coastal sediments of Mediterranean Sea, Mersin was compiled using data published between 1980 and 2009, and the present study. The first congener specific PCB results from the region yield concentration levels of Sigma(41) PCBs in sediments ranging from 0.61 to 1.04 ng g(-1). Sediment profiles show penta-, hexa- and hepta-chlorobiphenyls, specifically, #149 and 153 as the most abundant congeners in all samples. Comparison of tot...
Parameterization of iron and manganese cycling in the Black Sea suboxic and anoxic environment Konovalov, S; Samodurov, A; Oguz, T; Ivanov, L (Elsevier BV, 2004-12-01) New and published data on the distribution and speciation of manganese and iron in seawater are analyzed to identify and parameterize major biogeochemical processes of their cycling within the suboxic (similar to15.6less than or equal tosigma(t)less than or equal tosimilar to16.2) and anoxic layers (sigma(t)less than or equal tosimilar to16.2) of the Black Sea. A steady-state transport-reaction model is applied to reveal layering and parameterize kinetics of redox and dissolution/precipitation processes. Pr...
Measurement of the flavour composition of dijet events in pp collisions at root s=7 TeV with the ATLAS detector Aad, G.; et. al. (Springer Science and Business Media LLC, 2013-02-01) This paper describes a measurement of the flavour composition of dijet events produced in pp collisions at root s = 7 TeV using the ATLAS detector. The measurement uses the full 2010 data sample, corresponding to an integrated luminosity of 39 pb(-1). Six possible combinations of light, charm and bottom jets are identified in the dijet events, where the jet flavour is defined by the presence of bottom, charm or solely light flavour hadrons in the jet. Kinematic variables, based on the properties of displace...
The experimental analysis on the Late Quaternary deposits of the Black Sea Tekiroglu, SE; Ediger, V; Yemenicioglu, S; Kapur, S; Akca, E (Elsevier BV, 2001-01-01) Holocene sediments taken from the south-eastern and western Black Sea have been investigated in relation to their geochemical, sedimentological and mineralogical characteristics. Their textures are characterized by their low amount of sand, upward-increasing silt and downward-increasing clay contents. While the terrigenous materials transported from Anatolian volcanic-based sources and European alluvial sediments form the shore deposits, the deep-sea sediments mainly consist of the marine biological product...

Citation Formats

A. C. SAYDAM, S. Tuğrul, Ö. BAŞTÜRK, and T. Oğuz, “Identification of the oxic anoxic interface by isopycnal surfaces in the black sea,” Deep-Sea Research Part I-Oceanographic Research Papers, pp. 1405–1412, 1993, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/58052.