Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes ...

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 anal...

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Bibliographic Details
Main Authors: Kostrova, Svetlana S, Meyer, Hanno, Bailey, Hannah, Ludikova, Anna V, Gromig, Raphael, Kuhn, Gerhard, Shibaev, Yu A, Kozachek, Anna, Ekaykin, Alexey A, Chapligin, Bernhard
Format: Dataset
Language:English
Published: PANGAEA 2019
Subjects:
biogenic silica
Climate changes
lake sediments
palaeohydrology
Stable isotopes
Core
DEPTH, sediment/rock
Calendar age
Silicon dioxide
Aluminium oxide
Sodium oxide
Magnesium oxide
Potassium oxide
Calcium oxide
Manganese oxide
Iron oxide, FeO
Sum
Diatoms, δ18O
Contamination
Measured
Contamination corrected
Paleolimnological Transect PLOT
Polar Terrestrial Environmental Systems @ AWI AWI_Envi
Northwest Russia
Online Access:https://dx.doi.org/10.1594/pangaea.899329
https://doi.pangaea.de/10.1594/PANGAEA.899329
Description
Summary: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 ... : 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 ...

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