globalchange  > 气候减缓与适应
DOI: 10.1002/2017JG003840
Scopus记录号: 2-s2.0-85042623819
论文题名:
Linking the Modern Distribution of Biogenic Proxies in High Arctic Greenland Shelf Sediments to Sea Ice, Primary Production, and Arctic-Atlantic Inflow
作者: Limoges A.; Ribeiro S.; Weckström K.; Heikkilä M.; Zamelczyk K.; Andersen T.J.; Tallberg P.; Massé G.; Rysgaard S.; Nørgaard-Pedersen N.; Seidenkrantz M.-S.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:3
起始页码: 760
结束页码: 786
语种: 英语
英文关键词: Arctic sea ice ; biomarkers ; Greenland fjords ; microfossils ; paleoclimate
Scopus关键词: bathymetry ; benthic foraminifera ; biomarker ; climate variation ; diatom ; dinoflagellate ; dinoflagellate cyst ; microfossil ; organic matter ; paleoclimate ; planktonic foraminifera ; primary production ; proxy climate record ; sea ice ; seawater ; shelf sediment ; surficial sediment ; Arctic ; Arctic Ocean ; Denmark ; Germany ; Greenland ; Hagen ; North Rhine-Westphalia ; Wandel Sea ; Bacillariophyta ; Dinophyceae ; Polarella glacialis
英文摘要: The eastern north coast of Greenland is considered to be highly sensitive to the ongoing Arctic warming, but there is a general lack of data on modern conditions and in particular on the modern distribution of climate and environmental proxies to provide a baseline and context for studies on past variability. Here we present a detailed investigation of 11 biogenic proxies preserved in surface sediments from the remote High Arctic Wandel Sea shelf, the entrance to the Independence, Hagen, and Danmark fjords. The composition of organic matter (organic carbon, C:N ratios, δ13C, δ15N, biogenic silica, and IP25) and microfossil assemblages revealed an overall low primary production dominated by benthic diatoms, especially at the shallow sites. While the benthic and planktic foraminiferal assemblages underline the intrusion of chilled Atlantic waters into the deeper parts of the study area, the distribution of organic-walled dinoflagellate cysts is controlled by the local bathymetry and sea ice conditions. The distribution of the dinoflagellate cyst Polarella glacialis matches that of seasonal sea ice and the specific biomarker IP25, highlighting the potential of this species for paleo sea ice studies. The information inferred from our multiproxy study has important implications for the interpretation of the biogenic-proxy signal preserved in sediments from circum-Arctic fjords and shelf regions and can serve as a baseline for future studies. This is the first study of its kind in this area. ©2018. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114360
Appears in Collections:气候减缓与适应

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作者单位: Department of Glaciology and Climate, Geological Survey of Denmark and Greenland, Copenhagen, Denmark; Now at Department of Earth Sciences, University of New Brunswick, Fredericton, NB, Canada; Department of Environmental Sciences, Environmental Change Research Unit, University of Helsinki, Helsinki, Finland; Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, Arctic University of Norway, Tromsø, Norway; CENPERM, Department of Geosciences and Natural Resource Management, Copenhagen University, Copenhagen, Denmark; UMI3376 TAKUVIK, Department of Biology, CNRS and Université Laval, Quebec City, QC, Canada; Arctic Research Centre, Aarhus University, Aarhus, Denmark; Centre for Earth Observation Science, Department of Environment and Geography, University of Manitoba, Winnipeg, MB, Canada; Department of Marine Geology, Geological Survey of Denmark and Greenland, Copenhagen, Denmark; Centre for Past Climate Studies, Department of Geoscience, Aarhus University, Aarhus, Denmark

Recommended Citation:
Limoges A.,Ribeiro S.,Weckström K.,et al. Linking the Modern Distribution of Biogenic Proxies in High Arctic Greenland Shelf Sediments to Sea Ice, Primary Production, and Arctic-Atlantic Inflow[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(3)
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