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

Subpolar Atlantic dynamics drive Arctic climate at the onset 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...

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Veröffentlicht in:Science advances Jg. 7; H. 48; S. eabj2946
Hauptverfasser: 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: Journal Article
Sprache:Englisch
Veröffentlicht: United States American Association for the Advancement of Science 26.11.2021
Schlagworte:
Climatology
Earth, Environmental, Ecological, and Space Sciences
SciAdv r-articles
ISSN:2375-2548, 2375-2548
Online-Zugang:Volltext
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Zusammenfassung:Subpolar Atlantic dynamics drive Arctic climate at the onset 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 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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These authors contributed equally to this work.
ISSN:2375-2548
2375-2548
DOI:10.1126/sciadv.abj2946