January air palaeotemperature for 28-21 cal. ka BP based on stable isotope composition of AMS radiocarbon dated syngenetic ice wedges at Seyakha site, Yamal Peninsula

Авторы: Vasil'chuk Yu, Vasil'chuk A., Budantseva N.
Сборник: Radiocarbon in the Environment III Conference, Gliwice, Poland, 5-9 July 2021, Book of Abstracts
Тезисы
Год издания: 2021
Первая страница: 63
Последняя страница: 64
Аннотация: The main aims of the study are 14С dating of syngenetic ice wedges and enclosing sediments, obtaining the data of stable oxygen and hydrogen composition of ice for high-resolution isotope diagrams from detailed sampled yedoma exposed in third lagoon-marine terrace near the mouth of the Seyakha (Zelyonaya) River, on the coast of the Ob Bay, Yamal Peninsula (70°9'26.51"N, 72°34'8.76"E). Seyakha syngenetic ice wedges were 14С dated with conventional liquid scintillation counting (for enclosing sediments) and by AMS dating (organic micro-inclusions extracted directly from ice wedges). New stable isotope data suggest that from 28 to 21 cal ka BP the mean January air temperature ranged from –35 to –39°C (recent mean January air temperature is –23°C). A marked upward increase of oxygen isotope values in the ice wedge is most likely due to the increase of mean air January temperature at the final stages of the ice wedge growth.
Добавил в систему: Буданцева Надежда Аркадьевна

	ИСТИНА	Войти в систему Регистрация
	ИПМех РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА