Surface and sub-surface multi-proxy reconstruction of middle to late Holocene palaeoceanographic changes in Disko Bugt, West Greenland

Abstract

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Holocene variability in sea ice cover, primary production, and Pacific‐Water inflow and climate change in the Chukchi and East Siberian Seas (Arctic Ocean)

“…). Increased IP 25 fluxes in the Canadian Arctic (Vare et al , ; Belt et al , ), increased IRD input in the northern North Atlantic (Moros et al , ), and extended sea ice in Baffin Bay based on dinocyst and diatom data (Levac et al , ; Moros et al , ) support this trend of increasing sea ice cover as well. Furthermore, this increase in circum‐Arctic sea ice is paralleled by major glacier advances such as on Franz Josef Land, Spitsbergen and Scandinavia (Nesje et al , ; Wanner et al , , and references therein).…”

Late Holocene Sea Surface Instabilities in the Disko Bugt Area, West Greenland, in Phase With δ18O Oscillations at Camp Century

“…Previous studies demonstrated that the establishment of full interglacial conditions in the region was delayed to about 6 ka BP (Lloyd et al, ; Ouellet‐Bernier et al, ; Perner, Moros, Snowball, et al, ). These also showed that millennial‐scale oscillations with opposite changes in surface temperature and salinity occurred after 6 ka BP, pointing to variations in stratification of surface waters, probably due to freshwater and meltwater discharge from the GIS (Lloyd et al, ; Moros et al, ; Ouellet‐Bernier et al, ; Perner, Moros, Snowball, et al, ). The Holocene thermal optimum in the Disko Bugt was recorded from 6 to 3.5 ka BP in both bottom and surface waters (Andresen et al, ; Lloyd et al, ; Moros et al, ; Ouellet‐Bernier et al, ; Perner, Moros, Jennings, et al, ).…”

“…These also showed that millennial‐scale oscillations with opposite changes in surface temperature and salinity occurred after 6 ka BP, pointing to variations in stratification of surface waters, probably due to freshwater and meltwater discharge from the GIS (Lloyd et al, ; Moros et al, ; Ouellet‐Bernier et al, ; Perner, Moros, Snowball, et al, ). The Holocene thermal optimum in the Disko Bugt was recorded from 6 to 3.5 ka BP in both bottom and surface waters (Andresen et al, ; Lloyd et al, ; Moros et al, ; Ouellet‐Bernier et al, ; Perner, Moros, Jennings, et al, ). Onshore, the warmest air temperatures as reconstructed from chironomids were recorded from 6 to 4 ka BP (Axford et al, ).…”

“…Onshore, the warmest air temperatures as reconstructed from chironomids were recorded from 6 to 4 ka BP (Axford et al, ). This climate optimum was followed by the Neoglacial cooling, between 3.5 to 2 ka BP, marked by cold subsurface waters (Andresen et al, ; Lloyd et al, ; Moros et al, ; Perner, Moros, Jennings, et al, ; Perner et al, ) and a reduction in meltwater discharge (Andresen et al, ; Moros et al, ). Then, relatively warm conditions set in from 2 to 1.5 ka BP, followed by another regional cooling (Andresen et al, ; Krawczyk et al, , , ; Lloyd et al, ; Moros et al, , ; Ouellet‐Bernier et al, ; Perner, Moros, Jennings, et al, ; Perner et al, ; Ribeiro et al, ; Seidenkrantz et al, ; Sha et al, ).…”

Summer Sea-Surface Temperatures and Climatic Events in Vaigat Strait, West Greenland, during the Last 5000 Years

“…The Disko Bugt area in central West Greenland has attracted considerable research attention in recent years, and there have been studies of both oceanic variability [1][2][3][4] and fluctuations in tidewater-based ice streams such as Jakobshavns Isbrae [5][6][7][8][9]. In addition, special attention has been paid to the variation of the ice sheet and the deglaciation during the late Quaternary, and to the nearshore-to-offshore ocean circulation during the Holocene.…”