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A novel methodology for the estimation of the spatiotemporal distribution of 137Cs dose rates in pelagic fish in the South Aegean Sea, Greece, based on earth observation data.

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Τίτλος: A novel methodology for the estimation of the spatiotemporal distribution of 137Cs dose rates in pelagic fish in the South Aegean Sea, Greece, based on earth observation data.
Συγγραφείς: Mavrokefalou G; Environmental Radioactivity & Aerosol Technology for Atmospheric and Climate Impact Lab, Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, NCSR 'Demokritos', Patr. Gregoriou E' & 27, Neapoleos Str.Agia Paraskevi, PO Box 60037, Athens, Postal Code GR 153 41, Greece. gmavrokefalou@ipta.demokritos.gr.; Department of Nuclear and Elementary Particle Physics, School of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, Thessaloniki, Postal Code GR 541 24, Greece. gmavrokefalou@ipta.demokritos.gr.; Geospatial Enabling Technologies, 43 Posidonos Ave. & Chrisostomou Smirnis Str., Moschato, Athens, Postal Code GR 183 44, Greece. gmavrokefalou@ipta.demokritos.gr., Florou H; Environmental Radioactivity & Aerosol Technology for Atmospheric and Climate Impact Lab, Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, NCSR 'Demokritos', Patr. Gregoriou E' & 27, Neapoleos Str.Agia Paraskevi, PO Box 60037, Athens, Postal Code GR 153 41, Greece., Sykioti O; Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Vas. Pavlou & I. Metaxa, Penteli, Athens, Postal Code GR 152 36, Greece., Kitis G; Department of Nuclear and Elementary Particle Physics, School of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, University Campus, Thessaloniki, Postal Code GR 541 24, Greece., Vakkas T; Geospatial Enabling Technologies, 43 Posidonos Ave. & Chrisostomou Smirnis Str., Moschato, Athens, Postal Code GR 183 44, Greece.
Πηγή: Environmental monitoring and assessment [Environ Monit Assess] 2026 Jul 27; Vol. 198 (8). Date of Electronic Publication: 2026 Jul 27.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Springer Country of Publication: Netherlands NLM ID: 8508350 Publication Model: Electronic Cited Medium: Internet ISSN: 1573-2959 (Electronic) Linking ISSN: 01676369 NLM ISO Abbreviation: Environ Monit Assess Subsets: MEDLINE
Imprint Name(s): Publication: 1998- : Dordrecht : Springer
Original Publication: Dordrecht, Holland ; Boston : D. Reidel Pub. Co., c1981-
Ιατρικοί όροι (MeSH): Cesium Radioisotopes*/analysis , Cesium Radioisotopes*/metabolism , Radiation Monitoring*/methods , Water Pollutants, Radioactive*/analysis , Water Pollutants, Radioactive*/metabolism , Fishes*/metabolism, Seawater/chemistry ; Animals ; Greece
Περίληψη: In this study, a methodology has been developed for the estimation of the spatiotemporal distribution of 137Cs dose rates in four widely consumed pelagic and pelagic-neritic fish species, Boops boops (Gopa), Spicara flexuosum (Tseroula), Sardina pilchardus (Sardella), and Trachurus trachurus (Savridi), in the South Aegean Sea, Greece, based on earth observation (EO) data. These species are selected due to their native status in the Mediterranean, abundance in the Aegean Sea, and their representation of different habitat types within pelagic and pelagic-neritic systems. The 137Cs surface seawater activity concentrations are estimated using previously established equations derived from relations between EO marine parameters and laboratory measurements of 137Cs seawater activity concentrations. These EO marine measurements, namely NASA's MODIS iPAR and PAR (photosynthetically available radiation) level 3 monthly products, are used as input in these equations for the estimation of monthly surface seawater 137Cs activity concentration maps, within a GIS environment. The corresponding dose rate maps for each one of the four fish species are produced by using well-established radiation protection equations and the estimated 137Cs surface seawater activity concentration maps: (a) assuming external dose rate in an infinite space and (b) internal dose by using species-specific concentration factors (CFs), which have been calculated for the Aegean Sea in ENRACT, enabling assessment of variability in radionuclide uptake and associated dose rates. The validity of these estimations is evaluated through independent 137Cs activity concentration measurements from the South Aegean Sea, while uncertainty was assessed performing a sensitivity analysis. The approach is limited by the region-specific applicability of the regression model and the lack of sufficient validation datasets. The produced monthly maps cover the years 2017-2019 with a spatial resolution of 4 km. The results demonstrate the potential of integrating EO data with radioecological modeling in marine ecosystems for producing routine monitoring maps on a systematic time scale.
(© 2026. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Competing Interests: Declarations. Ethics approval: Not applicable. All authors have read, understood, and have complied as applicable with the statement on “Ethical responsibilities of Authors” as found in the Instructions for Authors. Consent to participate: Not applicable. Consent for publication: Not applicable. Competing interests: The authors declare no competing interests. Employment: Authors are currently employed as follows, GM is currently employed as a GIS engineer in Geospatial Enabling Technologies and is a PhD fellow in NCSR “Demokritos” and AUTH. HF is former head of the ENRACT/ERL. OS is Director of Research in NOA. GK is emeritus professor in AUTH, physics department and TV is CTO of the Geospatial Enabling Technologies company.
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Contributed Indexing: Keywords: 137Cs activity concentrations; 137Cs dose rates; Aegean sea; Ocean color; Pelagic fish; Remote sensing; Μarine radioactive pollution
Substance Nomenclature: 0 (Cesium Radioisotopes)
0 (Water Pollutants, Radioactive)
4T2E65IAR7 (Cesium-137)
Entry Date(s): Date Created: 20260727 Date Completed: 20260727 Latest Revision: 20260727
Update Code: 20260727
DOI: 10.1007/s10661-026-15722-2
PMID: 42507174
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1573-2959
DOI:10.1007/s10661-026-15722-2