Sea ice and primary production proxies in surface sediments from a High Arctic Greenland fjord: spatial distribution and implications for palaeoenvironmental studies
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Sea ice and primary production proxies in surface sediments from a High Arctic Greenland fjord : spatial distribution and implications for palaeoenvironmental studies. / 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.
I: Ambio, Bind 46, Nr. Suppl. 1, 2017, s. 106-118.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Sea ice and primary production proxies in surface sediments from a High Arctic Greenland fjord
T2 - spatial distribution and implications for palaeoenvironmental studies
AU - Ribeiro, Sofia
AU - Sejr, Mikael K.
AU - Limoges, Audrey
AU - Heikkilä, Maija
AU - Andersen, Thorbjørn Joest
AU - Tallberg, Petra
AU - Weckström, Kaarina
AU - Husum, Katrine
AU - Forwick, Matthias
AU - Dalsgaard, Tage
AU - Massé, Guillaume
AU - Seidenkrantz, Marit-Solveig
AU - Rysgaard, Søren
PY - 2017
Y1 - 2017
N2 - 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 IP25 was detected at all sites but at low concentrations, indicating that IP25 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.
AB - 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 IP25 was detected at all sites but at low concentrations, indicating that IP25 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.
KW - Arctic sea ice
KW - Greenland fjords
KW - HBIs
KW - Primary production
KW - Proxies
KW - Silica
U2 - 10.1007/s13280-016-0894-2
DO - 10.1007/s13280-016-0894-2
M3 - Journal article
C2 - 28116686
AN - SCOPUS:85010310982
VL - 46
SP - 106
EP - 118
JO - Ambio
JF - Ambio
SN - 0044-7447
IS - Suppl. 1
ER -
ID: 173285626