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.
If you want to read the whole article, you have to follow the link.
Too much to cut and paste. Although the “Abstract” pretty much tells the