Holocene Environments in the Reykjanes Ridge Area, North Atlantic, Based on Micropaleontological Data

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Abstract

New data on the stability of marine systems and the manifestation of the Holocene thermal optimum as a modern interglacial in the eastern part of the North Atlantic Subpolar Gyre were obtained. Interpretation of micropaleontological data from the AMK‑325 sediment core and reconstructed summer sea paleotemperatures revealed the peculiarities of the development of the local environment in the last 10.8 thousand years. The rapid transition in the Early Holocene 10.1–9.3 thousand years ago to a warm state almost up to the modern level occurred in accordance with regional and global paleoclimatic archives. The subsequent strongly pronounced cold interval 8.2–7.3 thousand years ago is consistent with the global cooling “8.2 ka”, but was much longer. The establishment of optimal conditions with an increase in water temperature by 1.5–2°C above modern values was noted in the second half of the Middle Holocene 6.8–4.9 thousand years ago, later than the global Holocene optimum.

About the authors

A. G Matul

Shirshov Institute of Oceanology of Russian Academy of Sciences

Email: amatul@mail.ru
Moscow, Russia

A. A Melnikova

Shirshov Institute of Oceanology of Russian Academy of Sciences

Moscow, Russia

G. Kh Kazarina

Shirshov Institute of Oceanology of Russian Academy of Sciences

Moscow, Russia

E. A Novichkova

Shirshov Institute of Oceanology of Russian Academy of Sciences

Moscow, Russia

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