Kostrova, Svetlana S; Biskaborn, Boris K; Pestryakova, Luidmila A; Fernandoy, Francisco; Lenz, Marlene M; Meyer, Hanno (2021): Oxygen isotope composition of diatoms from Lake Emanda (northeastern Siberia, Russia) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.933228
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Published: 2021-06-30 • DOI registered: 2021-07-30
Abstract:
The sedimentary sequence of core Co1412 from Lake Emanda (65°17′N; 135°45′E; 671 m a.s.l) has been retrieved in August 2017 using gravity and percussion piston corers (UWITEC Ltd., Austria) and investigated within the German-Russian 'Paleolimnological Transect' (PLOT) project. Well preserved diatoms occur only in the upper 125-cm interval of a 6.1-m sediment core covering the last 13.2 cal. ka BP. Diatoms were purified to >98% SiO₂ and <0.8% Al₂O₃ suitable for oxygen isotope analysis. The δ¹⁸O diatom values were corrected for contamination and range between +22.5‰ and +27.8‰. A new dataset on diatom oxygen isotope composition provides insights into the climate and environmental dynamics in an extreme continental setting in northeastern Siberia. The δ¹⁸O diatom record reveals an obvious shift of 2‰ in the δ¹⁸O diatom record at 11.7−11.5 cal. ka BP reflecting the onset of the Holocene. Relatively high δ¹⁸O diatom during the Early Holocene suggests relatively warm and/or dry climate with associated evaporation effects. The absolute maximum in δ¹⁸O diatom of +27.7‰ consistent with high values of diatom indices at 7.9−7.0 cal. ka BP suggests a Mid Holocene Thermal Maximum. A continuous depletion in δ¹⁸O diatom since ~5.0 cal. ka BP is interpreted as Middle to Late Holocene cooling reaching the absolute minimum at 0.4 cal. ka BP (i.e. the Little Ice Age).
Related to:
Kostrova, Svetlana S; Biskaborn, Boris K; Pestryakova, Luidmila A; Fernandoy, Francisco; Lenz, Marlene M; Meyer, Hanno (2021): Climate and environmental changes of the Lateglacial transition and Holocene in northeastern Siberia: Evidence from diatom oxygen isotopes and assemblage composition at Lake Emanda. Quaternary Science Reviews, 259, 106905, https://doi.org/10.1016/j.quascirev.2021.106905
Project(s):
Paleolimnological Transect (PLOT)
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 03G0859: Paleolimnological Transect
Coverage:
Latitude: 65.294200 * Longitude: 135.759200
Minimum DEPTH, sediment/rock: 0.045 m * Maximum DEPTH, sediment/rock: 1.225 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Core | Core | Kostrova, Svetlana S | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Kostrova, Svetlana S | Geocode | |
| 3 | AGE | Age | ka BP | Kostrova, Svetlana S | Geocode | |
| 4 | Silicon dioxide in diatoms | SiO2 diatom | % | Kostrova, Svetlana S | content of the oxide in the purified diatom sample | |
| 5 | Aluminium oxide in diatoms | Al2O3 diatom | % | Kostrova, Svetlana S | content of the oxide in the purified diatom sample | |
| 6 | Diatoms, δ18O | Diatoms δ18O | ‰ SMOW | Meyer, Hanno | Elemental analyzer (PDZ Europa) | measured value in ISOLOAB facility |
| 7 | Contamination | Contamination | % | Kostrova, Svetlana S | ||
| 8 | Diatoms, δ18O, corrected | Diatoms δ18O corr | ‰ SMOW | Kostrova, Svetlana S | contamination corrected value |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
276 data points