The Key Section of the Valdai Peat Bog as a Source of Paleoecological and Paleoclimatic Information

Авторы: Tishkov A.A., Gracheva R.G., Konstantinov E.A., Samus A.V.
Журнал: Doklady Earth Sciences
Том: 509
Номер: 1
Год издания: 2023
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 345
Последняя страница: 352
DOI: 10.1134/S1028334X22601870
Аннотация: The paleoclimatic reconstruction of the last 14 ka was carried out by GPR sounding, spore–pollen analysis, and radiocarbon dating of a peat section (7 m) located in the model bog of Valdai National Park (Novgorod oblast). The peat accumulation rates varied from 0.075 mm/yr during the Late Glacial to 0.15–1.15 mm/yr during the Boreal stage (when the level of the Valdai lakes dropped by 10 m) and up to 4.25 mm/yr in recent centuries. Numerous cycles of the Holocene warming/cooling events were within ±1–2C compared to the current ones and were accompanied by moderate fluctuations in annual precipitation (±25–50 mm). The forest composition changes were the most considerable during the Atlantic period, when spruce–broad-leaved forests and oak woods were predominant. Over the last two thousand years, the regional vegetation dynamics has mainly been influenced by agricultural activity.
Добавил в систему: Самусь Алина Валентиновна

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