Rapid Atlantification along the Fram Strait at the beginning of the 20th century

The recent expansion of Atlantic waters into the Arctic Ocean represents undisputable evidence of the rapid changes occurring in this region. Understanding the past variability of this “Atlantification” is thus crucial in providing a longer perspective on the modern Arctic changes. Here, we reconstr...

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Bibliographic Details
Published in:Science Advances
Main Authors: Tesi, Tommaso, Muschitiello, Francesco, Mollenhauer, Gesine, Miserocchi, Stefano, Langone, Leonardo, Ceccarelli, Chiara, Panieri, Giuliana, Chiggiato, Jacopo, Nogarotto, Alessio, Hefter, Jens, Ingrosso, Gianmarco, Giglio, Federico, Giordano, Patrizia, Capotondi, Lucilla
Format: Text
Language:English
Published: American Association for the Advancement of Science 2021
Subjects:
Earth
Environmental
Ecological
and Space Sciences
Arctic
Arctic Ocean
Foraminifera*
Fram Strait
North Atlantic
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8612687/
http://www.ncbi.nlm.nih.gov/pubmed/34818051
https://doi.org/10.1126/sciadv.abj2946
Description
Summary:The recent expansion of Atlantic waters into the Arctic Ocean represents undisputable evidence of the rapid changes occurring in this region. Understanding the past variability of this “Atlantification” is thus crucial in providing a longer perspective on the modern Arctic changes. Here, we reconstruct the history of Atlantification along the eastern Fram Strait during the past 800 years using precisely dated paleoceanographic records based on organic biomarkers and benthic foraminiferal data. Our results show rapid changes in water mass properties that commenced in the early 20th century—several decades before the documented Atlantification by instrumental records. Comparison with regional records suggests a poleward expansion of subtropical waters since the end of the Little Ice Age in response to a rapid hydrographic reorganization in the North Atlantic. Understanding of this mechanism will require further investigations using climate model simulations.

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