The influence of meltwater on the Labrador Current in Heinrich event 1 and the Younger Dryas

Evidence for meltwater drainage via the St. Lawrence River Valley in marine cores from the Laurentian Channel at the time of the Younger Dryas

“…Although Pearce et al (2013) interpret a reduction in the inner Labrador Current after 12.2 cal ka BP, and explain it as a result of a northward shift in the Gulf Stream, it could also be the result of an intensification of the outer Labrador Current around Grand Bank (Fig. 2) (Li and Piper, 2015) at the expense of the inner current in Placentia Bay. But the path of the Labrador Current would have been essentially the same (Li and Piper, 2015).…”

“…2) (Li and Piper, 2015) at the expense of the inner current in Placentia Bay. But the path of the Labrador Current would have been essentially the same (Li and Piper, 2015).…”

The Holocene Labrador Current: Changing linkages to atmospheric and oceanographic forcing factors

“…(a) Downcore plot of carbonate as CaCO 3 (%) and S̅S̅ (μm) data in the bulk and carbonate‐free S̅S̅ (μm) sediments from core Pa96018‐06 on the western edge of Flemish Cap [ Li and Piper , ]. The data show that the S̅S̅ data are similar for bulk and carbonate‐free sediments over a wide range of carbonate abundance.…”

“…The contribution of carbonates by the phytoplankton is negligible at this site due to environmental factors [ Thomas et al ., ]. Some early Holocene sediments in core Hu06‐40 were likely transported in proglacial freshwater sediment‐laden plumes originating from Hudson Strait [ Hillaire‐Marcel et al , ; Jennings et al , ], but the depositional grain size would have been influenced by the LC [ Li and Piper , ]. Some sediments were also transported in dilute suspension in the LC.…”

“…The proportions of platy clay-sized minerals relative to more equant minerals vary somewhat through time [Mao et al, 2014], but the S̅ S̅ determined from both bulk and decarbonated sediment (Figure 4a) deposited by the LC in Flemish Pass [Li and Piper, 2015] covers a range of petrological types. The trends shown by the bulk and decarbonated S̅ S̅ curves in the records of Li and Piper [2015] show almost identical downcore patterns over a wide range of detrital carbonate contents (i.e., CaCO 3 (%)) ( Figure 4a), representing the full range of variation in sediment sources and ratio of rock flour to clay minerals. [Li and Piper, 2015].…”