Temporal variability of Pu signatures in a 210Pb-dated Sphagnum peat profile from the Northern Ural, Russian Federation

Cwanek, Anna; Łokas, Edyta; Mitchell, Edward A. D.; Mazei, Yuri A.; Gaca, P.; Milton, James A.

doi:10.1016/j.chemosphere.2021.130962

Cited by 12 publications

(19 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Further research is needed to confirm the different fallout patterns of 244 Pu in the 1950s in the studied area, but this premise could be in agreement with the results observed in other studies. Cwanek et al pointed to the early high-yielded nuclear detonations as a possible explanation for an unidentified event in the 1950s with an increase in the 240 Pu/ 239 Pu isotopic ratio from the study of the peat core in the Northern Ural (Russian Federation) …”

Section: Discussionmentioning

confidence: 99%

“…Cwanek et al pointed to the early high-yielded nuclear detonations as a possible explanation for an unidentified event in the 1950s with an increase in the 240 Pu/ 239 Pu isotopic ratio from the study of the peat core in the Northern Ural (Russian Federation). 33 4.3. Disentangling the Pu Signal from Studsvik.…”

Section: Signal From the Earliest Thermonuclear Testsmentioning

confidence: 99%

See 1 more Smart Citation

Plutonium Signatures in a Dated Sediment Core as a Tool to Reveal Nuclear Sources in the Baltic Sea

López-Lora

Olszewski

Chamizo

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

Plutonium distribution was studied in an undisturbed sediment core sampled from the Tvaren bay in the vicinity of the Studsvik nuclear facility in Sweden. The complete analysis, including minor isotopes, of the Pu isotope composition ( 238 Pu, 239 Pu, 240 Pu, 241 Pu, 242 Pu, and 244 Pu) allowed us to establish the Pu origin in this area of the Baltic Sea and to reconstruct the Studsvik aquatic release history. The results show highly enriched 239 Pu, probably originating from the Swedish nuclear program in the 1960s and 1970s and the handling of high burn-up nuclear fuel in the later years. In addition, the 244 Pu/ 239 Pu atomic ratio for the global fallout period between 1958 and 1965 is suggested to be (7.94 ± 0.31)•10 −5 . In the bottom layer of the sediment, dated 1953−1957, we detected a higher average 244 Pu/ 239 Pu ratio of (1.51 ± 0.11)•10 −4 , indicating the possible impact of the first US thermonuclear tests (1952−1958).

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Signal From the Earliest Thermonuclear Testsmentioning

confidence: 99%

Plutonium Signatures in a Dated Sediment Core as a Tool to Reveal Nuclear Sources in the Baltic Sea

López-Lora

Olszewski

Chamizo

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Для перечисленных выше моделей мы следовали рекомендованной процедуре расчёта [15], также применили указанный выше практический метод расчёта [14], уделяя особое внимание вопросам зависимых переменных при оценке ошибок. Для выполнения датирования мы следовали дополнительно описанному методу аппроксимации для набора данных, указанных в статье [6].…”

Section: радиохимическое разделение и измерение Po и Biunclassified

“…𝑢𝑢𝑢𝑢𝑢𝑢𝑢𝑢𝑢(37)� = � 𝑢𝑢𝑢𝑢 𝑢𝑢𝑢𝑢𝑢𝑢(39)�� Линейные нормы накопления торфа хорошо согласуются с литературными данными [6]. Значения s показали по крайней мере один и тот же порядок величины.…”

Section: неопределенность U(a(37))unclassified

“…Основываясь на датировании 210 Pb, был оценен воздушный поток 210 Pb. По моделям CF и CF с применением метода МонтеКарло поток 210 Pb составил (52 ± 4) Бк/м 2 •год и (69.13 ± 10) Бк/м 2 •год соответственно, что хорошо согласуется с литературными данными [6].…”

Section: неопределенность U(a(37))unclassified

See 1 more Smart Citation

Comparison of 210Pb dating models as applied to peat deposits of the European Subarctic of Russia (evidence from the Arkhangelsk region)

Yakovlev¹,

Kudriavtseva

Орлов³

2022

Vestnik of Geosciences

View full text Add to dashboard Cite

The dating of young peatlands with 210Pb method is a difficult task. Standard 210Pb dating models require an exponential decrease in activity down the peat profile. In Arctic peatlands, we note a significant migratory capacity of lead, therefore, for accurate dating of peat, it is necessary to improve the existing dating models to eliminate the effect of migration and their verification using independent isotope chronometers, for example, 137Cs. We applied several models CA, CFCS, PF, CF together with the Monte Carlo method for peat core samples taken within the European Subarctic of Russia (Arkhangelsk region). Comparison with the specific activities of 137Cs, determined at a depth of 19—21 cm, associated with the global fallout in 1963, showed that the closest age to the specified reference point is given by the CFCS and CF models (1965 and 1962, respectively). Among these two options, CF using the Monte Carlo method turned out to be preferable, since it provided, taking into account the error, a slightly better agreement with the specific activities of 137Cs in the reference horizon. Despite the difficulties associated with the complex distribution of 210Pb over the peat section due to migration, the dating methods used were successful and, in the future, can be applied to dating other peat deposits.

show abstract

Unveiling threats to glacier biota: Bioaccumulation, mobility, and interactions of radioisotopes with key biological components

Buda,

Łokas,

Błażej

et al. 2024

Chemosphere

View full text Add to dashboard Cite

Temporal variability of Pu signatures in a 210Pb-dated Sphagnum peat profile from the Northern Ural, Russian Federation

Cited by 12 publications

References 68 publications

Plutonium Signatures in a Dated Sediment Core as a Tool to Reveal Nuclear Sources in the Baltic Sea

Plutonium Signatures in a Dated Sediment Core as a Tool to Reveal Nuclear Sources in the Baltic Sea

Comparison of 210Pb dating models as applied to peat deposits of the European Subarctic of Russia (evidence from the Arkhangelsk region)

Unveiling threats to glacier biota: Bioaccumulation, mobility, and interactions of radioisotopes with key biological components

Contact Info

Product

Resources

About