Abstract
The isotope characteristics (δD, δ18О) of Kara Sea water were studied for quantitative estimation of freshwater runoff at stations located along transect from Yamal Peninsula to Blagopoluchiya Bay (Novaya Zemlya). Freshwater samples were studied for glaciers (Rose, Serp i Molot) and for Yenisei and Ob estuaries. As a whole, δD and δ18O are higher in glaciers than in river waters. isotope composition of estuarial water from Ob River is δD =–131.4 and δ18O =–17.6‰. Estuarial waters of Yenisei River are characterized by compositions close to those of Ob River (–134.4 and–17.7‰), as well as by isotopically “heavier” compositions (–120.7 and–15.8‰). Waters from studied section of Kara Sea can be product of mixing of freshwater (δD =–119.4, δ18O =–15.5) and seawater (S = 34.9, δD = +1.56, δ18O = +0.25) with a composition close to that of Barents Sea water. isotope parameters of water vary significantly with salinity in surface layer, and Kara Sea waters are desalinated along entire studied transect due to river runoff. concentration of freshwater is 5–10% in main part of water column, and <5% at a depth of >100 m. maximum contribution of freshwater (>65%) was recorded in surface layer of central part of sea.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
A. V. Dubinin and E. O. Dubinina, “Isotope composition of oxygen and hydrogen in the black sea waters as a result of the dynamics of water masses,” Oceanology (Engl. Transl.) 54, 713–729 (2014).
E. O. Dubinina, S. A. Kossova, R. V. Fyaizullina, and A. Yu. Miroshnikov, “Isotope (δD, δ18 O) parameters of the Kara Sea water,” Proceedings of Scientific Conf. “Ecosystem of the Kara Sea: New Results of the Expeditions” (APR, Moscow, 2015), pp. 82–85.
A. G. Zatsepin, V. V. Kremenetskiy, A. A. Kubryakov, S. V. Stanichny, and D. M. Soloviev, “Propagation and transformation of waters of the surface desalinated layer in the Kara Sea,” Oceanology (Engl. Transl.) 55, 450–460 (2015).
A. Yu. Miroshnikov, “Distribution pattern of radioactive cesium in bottom sediments of the Kara Sea,” Geoekologiya, No. 6, 516–526 (2012).
V. I. Ferronskii and V. A. Polyakov, Isotopy of Earth’s Hydrosphere (Nauchnyi Mir, Moscow, 2009) [in Russian].
M. V. Flint and S. G. Poyarkov, “Comprehensive research on the Kara Sea ecosystem (128th Cruise of Research Vessel Professor Shtokman),” Oceanology (Engl. Transl.) 55, 657–659 (2015).
D. Bauch, H. Erlenkeuser, V. Stanovoy, et al., “Freshwater distribution and brine waters in the southern Kara Sea in summer 1999 as depicted by d18O results,” in Siberian River Run-off in the Kara Sea, Vol. 6: Characterization, Quantification, Variability and Environmental Significance, Ed. by R. Stein, et al. (Elsevier, Amsterdam, 2003), pp. 73–90.
D. Bauch, J. Holemann, N. Andersen, et al., “The Arctic shelf regions as a source of Freshwater and brineenriched waters as revealed from stable oxygen isotopes,” Polarforschung 80, 127–140 (2010).
D. Bauch, M. Groger, I. Dmitrenko, J. Holemann, et al., “Atmospheric controlled freshwater release at the Laptev Sea continental margin,” Polar Res. 30, 5858 (2011).
D. Bauch, J. A. Hölemann, I. A. Dmitrenko, et al., “Impact of Siberian coastal polynyas on shelf-derived Arctic Ocean halocline waters,” J. Geophys. Res.: Oceans 117 (9), (2012).
G. J. Bowen and J. Revenaugh, “Interpolating the isotopic composition of modern meteoric precipitation,” Water Resour. Res. 39 (10), 1299 (2003).
V. S. Brezgunov, V. K. Debolskii, V. V. Nechaev, et al., “Characteristics of the formation and salinity upon mixing of sea and river waters in the Barents and Kara Seas,” Water Resour. 9 (4), 335–344 (1983).
L. W. Cooper, T. E. Whitledge, J. M. Grebmeier, and T. Weingartner, “The nutrient, salinity, and stable oxygen isotope composition of Bering and Chukchi seas waters in and near the Bering Strait,” J. Geophys. Res. 102, 12563–12573 (1997).
L. W. Cooper, J. W. McClelland, R. M. Holmes, et al., “Flow-weighted values of runoff tracers (δ18O, DOC, Ba, alkalinity) from the six largest Arctic rivers,” Geophys. Res. Lett. 35, 18606 (2008).
L. W. Cooper, R. Benner, J. W. McClelland, et al., “Linkages among runoff, dissolved organic carbon, and the stable oxygen isotope composition of seawater and other water mass indicators in the Arctic Ocean,” J. Geophys. Res.: Biogeosci. 110, GO2013 (2005).
H. Craig and L. Gordon, “Deuterium and oxygen-18 variations in the ocean and the marine atmosphere,” Proceedings of the Conference “Stable Isotopes in Oceanographic Studies and Paleotemperatures,” 1965, Spoletto, Italy, Ed. by E. V. Tongiogi and F. Lishie (Consiglio Nazionale Delle Ricerche Laboratorio di Geologia Nucleare, Pisa, 1965), pp. 9–130.
W. Dansgaard, “Sable isotopes in precipitation,” Tellus 19, 435–463 (1964).
R. D. Frew, P. F. Dennis, K. J. Heywood, et al., “The oxygen isotope composition of water masses in the northern North Atlantic,” Deep-Sea Res. 47, 2265–2286 (2000).
V. V. Gordeev, J. M. Martin, I. S. Sidorov, and M. V. Sidorova, “A reassessment of the Eurasian river input of water, sediment, major elements, and nutrients to the Arctic Ocean,” Am. J. Sci. 296, 664–691 (1996).
M. Lehmann and U. Siegenthaler, “Equilibrium oxygen-and hydrogen-isotope fractionation between ice and water,” J. Glaciol. 37, 23–26 (1991).
H. G. Ostlund and G. Hut, “Arctic Ocean water mass balance from isotope data,” J. Geophys. Res. 89, 6373–6381 (1984).
V. K. Pavlov and S. L. Pfirman, “Hydrodynamic structure and variability of the Kara Sea: Implications for pollutant distribution,” Deep-Sea Res. 42, 1369–1390 (1995).
S. M. F. Sheppard, “Characterization and isotopic variations in natural waters,” Rev. Mineral. 16, 165–184 (1986).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © E.O. Dubinina, S.A. Kossova, A.Yu. Miroshnikov, R.V. Fyaizullina, 2017, published in Okeanologiya, 2017, Vol. 57, No. 1, pp. 38–48.
Rights and permissions
About this article
Cite this article
Dubinina, E.O., Kossova, S.A., Miroshnikov, A.Y. et al. Isotope parameters (δD, δ18O) and sources of freshwater input to Kara Sea. Oceanology 57, 31–40 (2017). https://doi.org/10.1134/S0001437017010040
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0001437017010040