Kostrova, Svetlana S; Meyer, Hanno; Chapligin, Bernhard; Bezrukova, Elena V; Tarasov, Pavel E; Kossler, Annette; Pavlova, L; Kuzmin, Mikhail I (2021): Oxygen isotope composition of diatoms from Lake Kotokel (southern Siberia, Russia) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.929441
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Abstract:
This is a diatom oxygen isotope record from Lake Kotokel (southern Siberia, Russia), with implications for responses of the lake system and its environment to global change over the past 46 cal. ka BP. The δ¹⁸O diatom values vary between +23.7 and +31.2‰ over the record. The results present mainly diatom assemblages of summer blooming periods, except for the time span between 36 and 32 cal. ka BP, when the isotopic signal records mainly a shift from summer to spring blooming conditions. Possible water temperature changes only partly explain the changes in the isotopic record. The observed isotopic patterns are mainly produced by isotope changes in lake water in response to variations in air temperature, hydrology, and atmospheric circulation in the region. During Marine Isotope Stage (MIS) 2 (Last Glacial maximum), high δ¹⁸O diatom resulted from rapid evaporation and low fluvial inputs. The relatively high δ¹⁸O diatom values during the first half of MIS 1 (Holocene interglacial) suggest an increased portion of summer precipitation associated with southern/southeastern moisture transport. The decrease in δ¹⁸O diatom values during the second half of MIS 1 is due to the overall hemispheric cooling and increased moisture supply to the area by the Atlantic air masses. The Lake Kotokel record provides an example of complex interplay among several climatic/environmental controls of δ¹⁸O diatom during the Late Pleistocene and the Holocene.
Keyword(s):
Further details:
Kostrova, Svetlana S; Meyer, Hanno; Chapligin, Bernhard; Kossler, Annette; Bezrukova, Elena V; Tarasov, Pavel E (2013): Holocene oxygen isotope record of diatoms from Lake Kotokel (southern Siberia, Russia) and its palaeoclimatic implications. Quaternary International, 290-291, 21-34, https://doi.org/10.1016/j.quaint.2012.05.011
Kostrova, Svetlana S; Meyer, Hanno; Chapligin, Bernhard; Tarasov, Pavel E; Bezrukova, Elena V (2014): The last glacial maximum and late glacial environmental and climate dynamics in the Baikal region inferred from an oxygen isotope record of lacustrine diatom silica. Quaternary International, 348, 25-36, https://doi.org/10.1016/j.quaint.2014.07.034
Kostrova, Svetlana S; Meyer, Hanno; Tarasov, Pavel E; Bezrukova, Elena V; Chapligin, Bernhard; Kossler, Annette; Pavlova, Liudmila A; Kuzmin, Mikhail I (2016): Oxygen isotope composition of diatoms from sediments of Lake Kotokel (Buryatia). Russian Geology and Geophysics, 57(8), 1239-1247, https://doi.org/10.1016/j.rgg.2016.08.009
Project(s):
Coverage:
Latitude: 52.783330 * Longitude: 108.116670
Minimum DEPTH, sediment/rock: 0.020 m * Maximum DEPTH, sediment/rock: 12.365 m
Event(s):
KTK2 * Latitude: 52.783330 * Longitude: 108.116670 * Elevation: 458.0 m * Lake water depth: 3.5 m * Penetration: 12.53 m * Location: Lake Kotokel * Method/Device: Livingstone piston corer (LPC) * Comment: Coring: August 2005; Diameter: 7.5 cm
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 – calibrated age | |
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 | concentration of contamination | |
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)
Size:
826 data points