Labrador current variability over the last 2000 years

Indications for a North Atlantic ocean circulation regime shift at the onset of the Little Ice Age

“…Our findings are in line with other high-resolution ocean sediment records, e.g. by Sicre et al (2014) who report a warming signal in the subpolar North Atlantic in contrast to a cooling in the Nordic Seas in sub-decadal ocean sediment records from North Iceland and North East Newfoundland. Signatures of a major environmental shift at the MCA-LIA transition are also reported from two calcite and quartz based sediment records from the Denmark Strait (Andrews and Jennings 2014).…”

Solar forcing as an important trigger for West Greenland sea-ice variability over the last millennium

“…This MCA-LIA climate transition, consistent with a suggested shift to more negative NAO conditions (Seidenkrantz et al, 2007(Seidenkrantz et al, , 2008Trouet et al, 2009Trouet et al, , 2012Olsen et al, 2012;Sicre et al, 2014), may be attributed to some combination of explosive volcanism and reductions in solar irradiance, especially the Sp€ orer Minimum. A cross-correlation analysis further shows that the maximum correlation is obtained at zero lag (Fig.…”

An abrupt weakening of the subpolar gyre as trigger of Little Ice Age-type episodes

“…Other SST reconstructions show, in contrast, warmer conditions during the LIA than during the MCA, for example, in the eastern subpolar North Atlantic (e.g., Miettinen et al 2012; Fig. 7d) or off northeastern Newfoundland (Sicre et al 2014). These SST reconstructions thus draw a characteristic pattern of cold Nordic and Labrador seas opposed to a warm eastern subpolar North Atlantic and North Atlantic Current that resembles the simulated post-shift SST anomaly pattern (Fig.…”