Tritium and radiocarbon in the water column of the Red Sea.

Autor: Povinec PP; Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, 84248, Slovakia. Electronic address: pavel.povinec@fmph.uniba.sk., Papadopoulos VP; Institute of Oceanography, Hellenic Centre for Marine Research, Anavyssos, 19013, Greece., Krokos G; Institute of Oceanography, Hellenic Centre for Marine Research, Anavyssos, 19013, Greece; Earth Sciences and Engineering Department, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia., Abualnaja Y; Red Sea Research Center, King Abdullah University for Science and Technology, Thuwal, 23955, Saudi Arabia., Pavlidou A; Institute of Oceanography, Hellenic Centre for Marine Research, Anavyssos, 19013, Greece., Kontuľ I; Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, 84248, Slovakia., Kaizer J; Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, 84248, Slovakia., Cherkinsky A; Center for Applied Isotope Studies, University of Georgia, Athens, GA, 30602-4702, USA., Molnár A; Isotoptech Zrt., H-4026, Debrecen, Hungary; University of Debrecen, Doctoral School of Physics, H-4026, Debrecen, Hungary., Molnár M; University of Debrecen, Doctoral School of Physics, H-4026, Debrecen, Hungary; INTERACT Centre, Institute for Nuclear Research, H-4026, Debrecen, Hungary., Palcsu L; Institute for Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary., Al Ghamdi AS; National Center for Environmental Compliance, Jeddah, Saudi Arabia., Anber HA; National Center for Environmental Compliance, Jeddah, Saudi Arabia., Al Othman AS; National Center for Environmental Compliance, Jeddah, Saudi Arabia., Hoteit I; Earth Sciences and Engineering Department, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia.
Jazyk: angličtina
Zdroj: Journal of environmental radioactivity [J Environ Radioact] 2023 Jan; Vol. 256, pp. 107051. Date of Electronic Publication: 2022 Oct 27.
DOI: 10.1016/j.jenvrad.2022.107051
Abstrakt: Despite being the busiest transient sea in the world due to the Suez Canal, radionuclide distribution studies in seawater and sediment of the Red Sea remain rare. A sampling expedition in the Red Sea was conducted from June 9 to July 6, 2021, visiting a transect of several deep sampling stations located along the central axis of the basin from the Gulf of Aqaba to the southern Red Sea (near Farasan Island, Saudi Arabia). The collected seawater profile samples were analyzed for tritium, radiocarbon and oxygen-18. The observed tritium levels in surface waters of the Red Sea peaked at 0.3-0.4 TU, similar to the values observed in the western Arabian Sea (decay corrected). The values observed at waters below 150 m were around 0.2 TU, however, at depths of 450 and 750 m, tritium minima (<0.2 TU) were observed, which could be associated with a partial return flow of bottom waters from the southern to the northern Red Sea. At two stations at the depth of about 550 m, deep Δ 14 C minima were observed as well (-4‰ and -10‰), documenting ongoing transport of carbon in the water column, important for sink of anthropogenic carbon.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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