Sea ice and primary production proxies in surface sediments from a High Arctic Greenland fjord: Spatial distribution and implications for palaeoenvironmental studies

Source at https://doi.org/10.1007/s13280-016-0894-2 . In order to establish a baseline for proxy-based reconstructions for the Young Sound–Tyrolerfjord system (Northeast Greenland), we analysed the spatial distribution of primary production and sea ice proxies in surface sediments from the fjord, ag...

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Bibliographic Details
Published in:Ambio
Main Authors: Ribeiro, Sofia, Sejr, Mikael K., Limoges, Audrey, Heikkilä, Maija, Andersen, Thorbjørn Joest, Tallberg, Petra, Weckström, Kaarina, Husum, Katrine, Forwick, Matthias, Dalsgaard, Tage, Massé, Guillaume, Seidenkrantz, Marit-Solveig, Rysgaard, Søren
Format: Article in Journal/Newspaper
Language:English
Published: Springer Verlag (Germany) 2017
Subjects:
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Sedimentologi: 456
VDP::Mathematics and natural science: 400::Geosciences: 450::Sedimentology: 456
Arctic sea ice
Greenland fjords
HBIs
Primary production
Proxies
Silica
Arctic
Greenland
Tyrolerfjord
Sea ice
Online Access:https://hdl.handle.net/10037/13484
https://doi.org/10.1007/s13280-016-0894-2
Description
Summary:Source at https://doi.org/10.1007/s13280-016-0894-2 . In order to establish a baseline for proxy-based reconstructions for the Young Sound–Tyrolerfjord system (Northeast Greenland), we analysed the spatial distribution of primary production and sea ice proxies in surface sediments from the fjord, against monitoring data from the Greenland Ecosystem Monitoring Programme. Clear spatial gradients in organic carbon and biogenic silica contents reflected marine influence, nutrient availability and river-induced turbidity, in good agreement with in situ measurements. The sea ice proxy IPz 25 was detected at all sites but at low concentrations, indicating that IP 25 records from fjords need to be carefully considered and not directly compared to marine settings. The sea ice-associated biomarker HBI III revealed an open-water signature, with highest concentrations near the mid-July ice edge. This proxy evaluation is an important step towards reliable palaeoenvironmental reconstructions that will, ultimately, contribute to better predictions for this High Arctic ecosystem in a warming climate.

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