Distribution of dissolved forms of iron and manganese in the Black Sea

Erdogan, Selahattin
Tuğrul, Süleyman
Dissolved forms of the redox-sensitive elements manganese (Mn-DISS) and iron (Fe(II) and Fe(III)) were measured in the oxic/anoxic transition zone, or suboxic zone, of the Black Sea. An offset was found between dissolved manganese and iron gradients at all stations. In the western cyclonic gyre of the Black Sea, the onset of dissolved Mn (> 0.1 mu M) was located at a density of about sigma(t) = 15.85, where the concentration of dissolved oxygen (DO) was less than 5 mu M. The onset of dissolved Fe(II) (> 0.025 mu M) was at sigma(t) = 15.90, just above the increases in hydrogen sulfide. These characteristic features were modified in the southern coastal waters by such physical processes as the rim current, formation of anticyclonic eddies, and injection of saline, oxygenated Marmara Sea waters from the Bosporus in the Bosporus Plume.


Analytical pyrolysis of suspended particulate organic matter from the Black Sea water column
Coban-Yildiz, Yesim; Fabbri, Daniele; Baravelli, Valentina; Vassura, Ivano; Yilmaz, Aysen; Tuğrul, Süleyman; Eker-Develi, Elif (Elsevier BV, 2006-01-01)
The chemical composition of suspended particulate organic matter (SPOM) in the Black Sea water column has been characterized by pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS). The results are discussed in terms of the hydro-chemical properties of the water column. Phytoplankton cultures grown in the lab also were analyzed to provide reference information for the euphotic zone SPOM. The composition of SPOM in the Black Sea displays important vertical variations dependent on specific distinct bioch...
Carbon and nitrogen isotopic ratios of suspended particulate organic matter (SPOM) in the Black Sea water column
Coban-Yildiz, Yesim; Altabet, M; YILMAZ, AYŞEN; Tuğrul, Süleyman (Elsevier BV, 2006-01-01)
Carbon and nitrogen isotopic ratios (delta(13)N and delta(13)C) of suspended particulate organic matter (SPOM) in the water column of the Black Sea were measured at a total of nine stations in September-October (autumn) 1999 and May 2001. For comparison, a station in the Mediterranean Sea and one in the Sea of Marmara were sampled in October 1999. Large-sized particle samples, as well as samples of surface sediment were also collected for N and C isotopic analysis. The results revealed important vertical an...
OGUZ, T; SUR, HI (1989-01-01)
Water exchange through the Dardanelles Strait is studied by a two-layer model which considers the laterally averaged flow formed by two homogeneous layers of differing density separated by an entraining interface. The model response is discussed in terms of observations from the strait. In particular, the observed asymmetry and rapid transition at the interface depth as weil as the intense mixing which occurs in the southwestern reaches of the strait are found to be related to the hydraulic characteristics ...
On the summer mesoscale variability of the Black Sea
Besiktepe, ST; Lozano, CJ; Robinson, AR (Journal of Marine Research/Yale, 2001-07-01)
The evolution of the Black Sea temperature, salinity and circulation, from large scale to mesoscale, is studied using a data-driven primitive equation simulation. The data are drawn from (i) a basin-wide hydrographic survey, CoMSBlack'92, obtained in the Summer of 1992; (ii) wind stress derived from wind analyses of the Sevastopol MSIA/URHI Office; (iii) climatological heat fluxes; and (iv) climatological river outflows. The primitive equation model is from the Harvard Ocean Prediction System. The simulatio...
Extension of sea surface temperature unpredictability
Akhmet, Marat; Alejaily, Ejaily Milad (Springer Science and Business Media LLC, 2019-02-01)
The sea surface temperature (SST) variability is clearly affected by global climate patterns, which involve large-scale ocean-atmosphere fluctuations similar to the El Nino-Southern Oscillation (ENSO). We give mathematical arguments for the SST to be unpredictable over oceans. Sensitivity (unpredictability) is the core ingredient of chaos. Several researches suggested that the ENSO might be chaotic. It was Vallis (Science 232:243-245, 1986) who revealed unpredictability in ENSO by reducing his model to the ...
Citation Formats
S. YEMENİCİOĞLU, S. Erdogan, and S. Tuğrul, “Distribution of dissolved forms of iron and manganese in the Black Sea,” DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, pp. 1842–1855, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57278.