North Atlantic variability and its links to European climate over the last 3000 years

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The scientists conclude:
‘It is therefore essential that we continue to improve our understanding of the LSW/subpolar gyre dynamics at a range of time scales to reduce uncertainty in future climate predictions.’
[LSW = Labrador Sea Water]

NOT A LOT OF PEOPLE KNOW THAT

By Paul Homewood

A newly published paper has linked changes in European climate to North Atlantic variability over the last 3000 years:

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ABSTRACT

The subpolar North Atlantic is a key location for the Earth’s climate system. In the Labrador Sea, intense winter air–sea heat exchange drives the formation of deep waters and the surface circulation of warm waters around the subpolar gyre. This process therefore has the ability to modulate the oceanic northward heat transport. Recent studies reveal decadal variability in the formation of Labrador Sea Water. Yet, crucially, its longer-term history and links with European climate remain limited. Here we present new decadally resolved marine proxy reconstructions, which suggest weakened Labrador Sea Water formation and gyre strength with similar timing to the centennial cold periods recorded in terrestrial climate archives and historical records over the last 3000 years. These new data support that subpolar North Atlantic circulation changes, likely…

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November 29, 2017 at 05:09AM

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