Late Pleistocene Paleoriver Channels on the Laptev Sea Shelf - Implications from Sub-Bottom Profiling

1999 ◽  
pp. 657-665 ◽  
Author(s):  
H. P. Kleiber ◽  
F. Niessen
Keyword(s):  
Late Pleistocene ◽  
Laptev Sea ◽  
The Laptev Sea

Late Pleistocene-Holocene events on the continental slope of the Laptev Sea: Evidence from benthic and planktonic foraminiferal assemblages

2015 ◽  
Vol 23 (6) ◽  
pp. 645-660 ◽  
Author(s):  
Ya. S. Ovsepyan ◽  
E. E. Taldenkova ◽  
H. A. Bauch ◽  
E. S. Kandiano
Keyword(s):  
Continental Slope ◽  
Late Pleistocene ◽  
Laptev Sea ◽  
The Laptev Sea

Mechanisms of Late Pleistocene authigenic Fe–Mn-carbonate formation at the Laptev Sea continental slope (Siberian Arctic)

arktos ◽  
2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Elizaveta Logvina ◽  
Alexeу Krylov ◽  
Еkaterina Taldenkova ◽  
Valentina Blinova ◽  
Vladimir Sapega ◽  
...  
Keyword(s):  
Continental Slope ◽  
Late Pleistocene ◽  
Laptev Sea ◽  
Carbonate Formation ◽  
Siberian Arctic ◽  
The Laptev Sea

scholarly journals Testate amoebae record from the Laptev Sea coast and its implication for the reconstruction of Late Pleistocene and Holocene environments in the Arctic Siberia

2009 ◽  
Vol 271 (3-4) ◽  
pp. 301-315 ◽  
Author(s):  
Stefanie Müller ◽  
Anatoly A. Bobrov ◽  
Lutz Schirrmeister ◽  
Andrei A. Andreev ◽  
Pavel E. Tarasov
Keyword(s):  
Late Pleistocene ◽  
Testate Amoebae ◽  
The Arctic ◽  
Laptev Sea ◽  
The Laptev Sea ◽  
Arctic Siberia ◽  
Sea Coast

scholarly journals Evolution of subsea permafrost landscapes in Arctic Siberia since the Late Pleistocene: a synoptic insight from acoustic data of the Laptev Sea

arktos ◽  
2015 ◽  
Vol 1 (1) ◽  
Author(s):  
P. Rekant ◽  
H. A. Bauch ◽  
T. Schwenk ◽  
A. Portnov ◽  
E. Gusev ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Laptev Sea ◽  
Acoustic Data ◽  
Subsea Permafrost ◽  
The Laptev Sea ◽  
Arctic Siberia

scholarly journals Composition of Sedimentary Organic Matter across the Laptev Sea Shelf: Evidences from Rock-Eval Parameters and Molecular Indicators

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3511
Author(s):  
Elena Gershelis ◽  
Andrey Grinko ◽  
Irina Oberemok ◽  
Elizaveta Klevantseva ◽  
Natalina Poltavskaya ◽  
...  
Keyword(s):  
Organic Matter ◽  
Surface Sediments ◽  
Continental Margins ◽  
Laptev Sea ◽  
Lena River ◽  
Nearshore Sediments ◽  
Rock Eval ◽  
Molecular Indicators ◽  
Sedimentation Regime ◽  
The Laptev Sea

Global warming in high latitudes causes destabilization of vulnerable permafrost deposits followed by massive thaw-release of organic carbon. Permafrost-derived carbon may be buried in the nearshore sediments, transported towards the deeper basins or degraded into the greenhouse gases, potentially initiating a positive feedback to climate change. In the present study, we aim to identify the sources, distribution and degradation state of organic matter (OM) stored in the surface sediments of the Laptev Sea (LS), which receives a large input of terrestrial carbon from both Lena River discharge and intense coastal erosion. We applied a suite of geochemical indicators including the Rock Eval parameters, traditionally used for the matured OM characterization, and terrestrial lipid biomarkers. In addition, we analyzed a comprehensive grain size data in order to assess hydrodynamic sedimentation regime across the LS shelf. Rock-Eval (RE) data characterize LS sedimentary OM with generally low hydrogen index (100–200 mg HC/g TOC) and oxygen index (200 and 300 CO2/g TOC) both increasing off to the continental slope. According to Tpeak values, there is a clear regional distinction between two groups (369–401 °C for the inner and mid shelf; 451–464 °C for the outer shelf). We suggest that permafrost-derived OM is traced across the shallow and mid depths with high Tpeak and slightly elevated HI values if compared to other Arctic continental margins. Molecular-based degradation indicators show a trend to more degraded terrestrial OC with increasing distance from the coast corroborating with RE results. However, we observed much less variation of the degradation markers down to the deeper sampling horizons, which supports the notion that the most active OM degradation in LS land-shelf system takes part during the cross-shelf transport, not while getting buried deeper.

Results of permafrost modelling of the lowlands and shelf of the Laptev Sea Region, Russia

2001 ◽  
Vol 12 (2) ◽  
pp. 191-202 ◽  
Author(s):  
Nikolai N. Romanovskii ◽  
Hans-W. Hubberten
Keyword(s):  
Laptev Sea ◽  
The Laptev Sea
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