8768-Летняя Ямальская Древесно-Кольцевая Хронология Как Инструмент Для Палеоэкологических Реконструкций

Хантемиров, Р. М.; Шиятов, С. Г.; Горланова, Л. А.; Кукарских, В. В.; Сурков, А. Ю.; Хамзин, И. Р.; Fonti, Patrick; Вакер, Л.

doi:10.31857/s0367059721050085

Экология

2021

DOI: 10.31857/s0367059721050085

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8768-Летняя Ямальская Древесно-Кольцевая Хронология Как Инструмент Для Палеоэкологических Реконструкций

Р. М. Хантемиров¹,

С. Г. Шиятов²,

Л. А. Горланова³

et al.

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2024

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Dynamics of vegetation of Central Yamal in the holocene

Lapteva,

Korona,

Kosintsev

2024

Èkologiâ

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The paper presents new paleobotanical data in combination with the results of radiocarbon dating obtained from organomineral deposits of the northern shore of Lake. Pechevalavato (70°13’22.3” N, 71°50’57.6” E) in the Seyakha river basin and characterizing the dynamics of vegetation in the northern part of Central Yamal in the Holocene. It has been established that in the Early Holocene (10.2–8.7 thousand years ago) in Yamal, tree-shaped birch (Betula sect. Betula) grew no less than 400 km north of the modern northern limit of distribution of Betula pubescens ssp. tortuosa. Favorable conditions for the existence of birch woodlands at this time were due to the higher temperature of the growing season, exceeding by approximately 3–4 °C the modern parameters of the warmest month of the summer season. At the end of the Early Holocene (after 8.5 thousand cal BP), forest vegetation began to degrade, and open landscapes with diverse plant communities of the subarctic tundra and single trees in the river valley spread. About 6.5 thousand cal BP the northern subarctic tundra began to form the zonal appearance of the study area in climatic conditions close to modern ones.

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Dynamics of vegetation of Central Yamal in the holocene

Lapteva,

Korona,

Kosintsev

2024

Èkologiâ

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Miyake events: a review of the state-of-the-art

Hantemirov

2024

Forestry Engineering Journal

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Miyake events are fast and significant radiocarbon rises in the Earth's atmosphere. Japanese researchers from Nagoya University discovered this kind of event based on radiocarbon analysis in tree rings. They found a spike in the radioactive carbon isotope in the ring of 775AD compared to the 774AD ring. Subsequently, all such events became known by the name of the first author of the seminal paper. To date, five Miyake events have been discovered: around 12350 BC, in 7176 and 5259 BC, in 775 and 993 AD. The events of 5410 BC, 1052 and 1279 AD are less pronounced and require confirmation. Among the possible reasons for the sharp increase in the content of radiocarbon in the atmosphere a comet falling to the Earth or to the Sun, a short gamma-ray burst, a supernova outbreak were suggested. The most likely version, however, is considered to be solar energetic particles as a result of a super-powerful solar flare. Such solar events should lead to auroras in low latitudes. However, in the annals of Europe, the Middle East and the Far East, no reliable records of auroras in the years of Miyake events have been found. Nowadays, Miyake events are used in many fields of science, for example, to check the reliability of dendrochronological dating, for accurate dating of ice core layers. The most important, however, is considered to be the possibility of radiocarbon dating with an accuracy of one year.

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8768-Летняя Ямальская Древесно-Кольцевая Хронология Как Инструмент Для Палеоэкологических Реконструкций

Cited by 2 publications

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Dynamics of vegetation of Central Yamal in the holocene

Dynamics of vegetation of Central Yamal in the holocene

Miyake events: a review of the state-of-the-art

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