Kostrova, Svetlana S; Meyer, Hanno; Bailey, Hannah; Ludikova, Anna V; Gromig, Raphael; Kuhn, Gerhard; Shibaev, Yu A; Kozachek, Anna; Ekaykin, Alexey A; Chapligin, Bernhard (2019): Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.899329, Supplement to: Kostrova, Svetlana S; Meyer, Hanno; Bailey, Hannah; Ludikova, Anna V; Gromig, Raphael; Kuhn, Gerhard; Shibaev, Yu A; Kozachek, A V; Ekaykin, Alexey A; Chapligin, Bernhard (2019): Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes. Boreas, 48(2), 361-376, https://doi.org/10.1111/bor.12385
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Abstract:
This article presents a new comprehensive assessment of the Holocene hydrological variability of Lake Ladoga, northwest Russia. The reconstruction is based on oxygen isotopes of lacustrine diatom silica (δ18O diatom) preserved in sediment core Co 1309, and is complemented by a diatom assemblage analysis and a survey of modern isotope hydrology. The data indicate that Lake Ladoga has existed as a freshwater reservoir since at least 10.8 cal. ka BP. The δ18O diatom values range from +29.8 to +35.0‰, and relatively higher δ18O diatom values around +34.7‰ between c. 7.1 and 5.7 cal. ka BP are considered to reflect the Holocene Thermal Maximum. A continuous depletion in δ18O diatom since c. 6.1 cal. ka BP accelerates after c. 4 cal. ka BP, indicating Middle to Late Holocene cooling that culminates during the interval 0.8-0.2 cal. ka BP, corresponding to the Little Ice Age. Lake-level rises result in lower δ18O diatom values, whereas lower lake levels cause higher δ18O diatom values. The diatom isotope record gives an indication for a rather early opening of the Neva River outflow at c. 4.4-4.0 cal. ka BP. Generally, overall high δ18O diatom values around +33.5‰ characterize a persistent evaporative lake system throughout the Holocene. As the Lake Ladoga δ18O diatom record is roughly in line with the 60°N summer insolation, a linkage to broader-scale climate change is likely.
Project(s):
Paleolimnological Transect (PLOT)
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 03G0859: Paleolimnological Transect
Coverage:
Latitude: 60.983300 * Longitude: 30.683300
Date/Time Start: 2013-09-01T00:00:00 * Date/Time End: 2013-09-01T00:00:00
Minimum DEPTH, sediment/rock: 0.03 m * Maximum DEPTH, sediment/rock: 1.87 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 | Calendar age | Cal age | ka BP | Kostrova, Svetlana S | ||
| 4 | Silicon dioxide | SiO2 | % | Kostrova, Svetlana S | content in the purified diatom sample | |
| 5 | Aluminium oxide | Al2O3 | % | Kostrova, Svetlana S | content in the purified diatom sample | |
| 6 | Sodium oxide | Na2O | % | Kostrova, Svetlana S | content in the purified diatom sample | |
| 7 | Magnesium oxide | MgO | % | Kostrova, Svetlana S | content in the purified diatom sample | |
| 8 | Potassium oxide | K2O | % | Kostrova, Svetlana S | content in the purified diatom sample | |
| 9 | Calcium oxide | CaO | % | Kostrova, Svetlana S | content in the purified diatom sample | |
| 10 | Manganese oxide | MnO | % | Kostrova, Svetlana S | content in the purified diatom sample | |
| 11 | Iron oxide, FeO | FeO | % | Kostrova, Svetlana S | content in the purified diatom sample | |
| 12 | Sum | Sum | % | Kostrova, Svetlana S | ||
| 13 | Diatoms, δ18O | Diatoms δ18O | ‰ SMOW | Kostrova, Svetlana S | Measured | |
| 14 | Contamination | Contamination | % | Kostrova, Svetlana S | ||
| 15 | Diatoms, δ18O | Diatoms δ18O | ‰ SMOW | Kostrova, Svetlana S | Contamination corrected |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
336 data points