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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Ice and Snow</journal-id><journal-title-group><journal-title xml:lang="en">Ice and Snow</journal-title><trans-title-group xml:lang="ru"><trans-title>Лед и снег</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2076-6734</issn><issn publication-format="electronic">2412-3765</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">659410</article-id><article-id pub-id-type="doi">10.31857/S2076673423010039</article-id><article-id pub-id-type="edn">HXOPEM</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Palaeoglaciology</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Палеогляциология</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Reconstruction of the mean January Air Temperature in the Early Holocene on the Eastern Coast of Chukotka</article-title><trans-title-group xml:lang="ru"><trans-title>Реконструкция среднеянварской температуры воздуха в раннем голоцене на восточном побережье чукотки</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Budantseva</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Буданцева</surname><given-names>Н. А.</given-names></name></name-alternatives><email>nadin.budanceva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Maslakov</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Маслаков</surname><given-names>А. А.</given-names></name></name-alternatives><email>nadin.budanceva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vasil’chuk</surname><given-names>Yu. K.</given-names></name><name xml:lang="ru"><surname>Васильчук</surname><given-names>Ю. К.</given-names></name></name-alternatives><email>nadin.budanceva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vasil’chuk</surname><given-names>A. C.</given-names></name><name xml:lang="ru"><surname>Васильчук</surname><given-names>А. К.</given-names></name></name-alternatives><email>nadin.budanceva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kuzyakin</surname><given-names>L. P.</given-names></name><name xml:lang="ru"><surname>Кузякин</surname><given-names>Л. П.</given-names></name></name-alternatives><email>nadin.budanceva@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-01-01" publication-format="electronic"><day>01</day><month>01</month><year>2023</year></pub-date><volume>63</volume><issue>1</issue><fpage>93</fpage><lpage>103</lpage><history><date date-type="received" iso-8601-date="2025-02-20"><day>20</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Н.А. Буданцева, А.А. Маслаков, Ю.К. Васильчук, А.К. Васильчук, Л.П. Кузякин</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Н.А. Буданцева, А.А. Маслаков, Ю.К. Васильчук, А.К. Васильчук, Л.П. Кузякин</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Н.А. Буданцева, А.А. Маслаков, Ю.К. Васильчук, А.К. Васильчук, Л.П. Кузякин</copyright-holder><copyright-holder xml:lang="ru">Н.А. Буданцева, А.А. Маслаков, Ю.К. Васильчук, А.К. Васильчук, Л.П. Кузякин</copyright-holder><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/2076-6734/article/view/659410">https://journals.eco-vector.com/2076-6734/article/view/659410</self-uri><abstract xml:lang="en"><p id="idm45181324577456">The investigation is concerned with the Early Holocene syngenetic massive wedge ice exposed in the outcrop of a polygonal peatland in the upper part of the third marine terrace near Lorino settlement on the eastern coast of Chukotka. Based on the obtained radiocarbon dates of peat, it was found that the formation of a peatland in the area began about 14–13 cal ka BP, at the end of the Younger Dryas, while the termination of the active stage of peat accumulation was dated to about 10–9 cal ka BP. The beginning of peat accumulation at the end of the Younger Dryas, earlier the officially accepted limit of the lower boundary of the Holocene (11.7 cal ka BP), and the termination of its formation by the middle of the Greenlandian Holocene period is not a rare phenomenon in Russian permafrost zone, although it is traditionally assumed that the most active formation of peatlands has been going on during the thermal maximum in the middle of the Holocene. The age inversions noted in the peat vertical profiles are the most likely indicative of the processes of re-deposition of ancient organic material due to erosion by water of the third marine terrace sediments and the separation of the allochthonous peat. During the period from 2015 to 2021, six fragments of peatland exposures with the ice wedges were studied. Analysis of the obtained data on the content of stable oxygen isotopes in the ice show that δ<sup>18</sup>О values vary within the range from –15.5 to –18‰. These values are in good agreement with the data for Early Holocene ice wedges earlier obtained in other areas of the eastern coast of Chukotka (Anadyr town, Uelen settlement), where authors report the δ<sup>18</sup>O values from –16 to –19.4‰. This suggests that the ice wedge growth as well as the peat accumulation were the most active in Early Holocene. The highest δ<sup>18</sup>О values (from –13.1 to –16.8‰) were obtained for the modern ice veinlets. The ratio δ<sup>2</sup>H–δ<sup>18</sup>O in the ice wedges, in general, is indicative of a good preservation of isotope signature of winter precipitation. It has been found that approximate mean January air temperature in the Early Greenlandian period varied from –23 to –27°С, which is, on average, 3°С below than the present-day ones.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181324582208">Формирование полигонального торфяника на поверхности третьей морской террасы в районе села Лорино на восточном побережье Чукотки началось в конце позднего дриаса и завершилось в начале голоцена. Среднеянварская температура воздуха в первой половине гренландского периода голоцена, реконструированная на основе данных изотопного состава повторно-жильных льдов, возраст которых не моложе 10–9 тыс. кал. лет назад, в среднем на 3°С ниже современной и варьировала от –23 до –27°С.</p></trans-abstract><kwd-group xml:lang="en"><kwd>ice wedges</kwd><kwd>eastern Chukotka</kwd><kwd>peatlands</kwd><kwd>oxygen isotopes</kwd><kwd>hydrogen isotopes</kwd><kwd>Holocene</kwd><kwd>paleotemperature reconstructions</kwd><kwd>radiocarbon age</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>повторно-жильный лёд</kwd><kwd>восточная Чукотка</kwd><kwd>торфяники</kwd><kwd>изотопы кислорода</kwd><kwd>изотопы водорода</kwd><kwd>голоцен</kwd><kwd>палеотемпературные реконструкции</kwd><kwd>радиоуглеродный возраст</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Anderson P.M., Lozhkin A.V. 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