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The stability of the Earth's climate is strongly linked to the steadiness of the atmospheric and oceanic transport of heat from low to high latitudes. High resolution Holocene sedimentary records from the subpolar North Atlantic demonstrate a persistent link between centennial to millennial scale fluctuations in the flow speed of Iceland-Scotland Overflow Water inferred from granulometric proxy data and both the surface North Atlantic Current component of the meridional overturning circulation (MOC) and published Fennoscandian atmospheric temperature variability. However, these data also highlight the difficulties associated with the interpretation of geochemical and sedimentological deep water circulation proxies as they do not provide a wholly consistent picture. The similarity between surface and deep ocean δ¹³C records suggests a preformed component in the deep ocean δ¹³C signal. On the other hand, the …