Benthic and planktic community changes at the North Siberian margin in response to Atlantic water mass variability since last deglacial times

On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

“…In a recent review, Carlson and Clark (2012) favoured an easterly route, but numerical modelling suggests a large influx of freshwater into the Arctic Ocean was more likely (although not necessarily from GLA: Tarasov and Peltier, 2005), and would have had a more significant impact on ocean circulation (Condron and Winsor, 2012). Several studies of deep-sea Arctic oxygen isotopes , faunal assemblages , Taldenkova et al, 2013, and other proxies (reviewed in Carlson and Clark, 2012) provide evidence for significant meltwater discharge through the Mackenzie River at the onset of the YD (see also Section 2.6), as does an OSL-dated sequence at the mouth of the Mackenzie River (Murton et al, 2010). However, Fisher and Lowell (2012) argued that, in the Agassiz basin and headwaters of the Mackenzie River (e.g.…”

“…There is also geophysical (submarine incised valleys) and stratigraphic evidence on the Chukchi Margin for deglacial ice-rafting and lake drainage, possibly from Alaska's Glacial Lake Noatak, that cannot be accounted for by river discharge or precipitation changes (Hill and Driscoll 2008). Off Siberia, sediments from the Laptev Sea indicate major hydrological changes during the last deglaciation (around 12.9 ka), perhaps from Lena River discharge (Spielhagen et al, 2005, Taldenkova et al, 2013.…”

Late Weichselian and Holocene palaeoceanography of Storfjordrenna, southern Svalbard

“…4) indicates weaker bottom currents at the beginning of the early Holocene and stronger bottom currents at the end of this period, which might be related to the ongoing isostatic uplift of the land masses of Svalbard as well as the sea level rise (e.g. Forman et al, 2004;Taldenkova et al, 2012). Significant fluctuations of δ 18 O and δ 13 C and increasing abundance of N. labradorica and Islandiella spp.…”

“…Feyling-Hanssen and Jørstad, 1950;Hjort et al, 1992). Mytilus edulis spawn at temperatures above 8-10 • C ( Thorarinsdóttir and Gunnarson, 2003) and thus are considered to indicate higher surface-water temperature related to stronger AW inflow during the early Holocene (11 000-6800 cal yr BP) (Feyling-Hanssen, 1955;Salvigsen et al, 1992;Hansen et al, 2011). Although the progressive development of Mytilus edulis is well documented by periods of warming and inflow of AW to the Hinlopen Trough, the presence of this species in Storfjorden (W Edgeøya; Fig.…”

Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition

“…Such events are indicative of rapid environmental change. For example, prior studies have documented range shifts in Arctic benthic foraminifera during the last deglacial and Holocene intervals from the eastern Arctic Ocean (Wollenburg et al, 2001), the Laptev Sea (Taldenkova et al, 2008(Taldenkova et al, , 2012, the Beaufort Sea and Amundsen Gulf (Scott et al, 2009) and in older sediments (Polyak et al, 1986Ishman and Foley, 1996;Cronin et al, 2014). The SWERUS-32 data reveal two Rabilimis…”