Citation:

PANGAEA.933228

Name: Oxygen isotope composition of diatoms from Lake Emanda (northeastern Siberia, Russia)
Published: 2021-06-30
License: https://creativecommons.org/licenses/by/4.0/
Keywords: climate change; diatoms; eastern Siberia; lake sediments; stabe isotopes

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2021-06-30 • DOI registered: 2021-07-30

RIS Citation BibTeX Citation Text Citation ShareShow Map Google Earth

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).

Keyword(s):

climate change; diatoms; eastern Siberia; lake sediments; stabe isotopes

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)

Polar Terrestrial Environmental Systems @ AWI (AWI_Envi)

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):

Co1412 (Lake Emanda) * Latitude: 65.294200 * Longitude: 135.759200 * Location: northeastern Siberia * Method/Device: Sediment corer (SEDCO) * Comment: Retrieved: August 2017 using gravity and percussion piston corers (UWITEC Ltd., Austria)

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

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Core	2 Depth sed [m]	3 Age [ka BP]	4 SiO2 diatom [%]	5 Al2O3 diatom [%]	6 Diatoms δ18O [‰ SMOW]	7 Contamination [%]	8 Diatoms δ18O corr [‰ SMOW]
Co1412-1	0.045	0.404	99.55	0.23	22.38	1.34	22.50
Co1412-1	0.085	0.824	99.34	0.36	23.27	2.04	23.47
Co1412-1	0.125	1.263	99.29	0.31	22.75	1.81	22.92
Co1412-1	0.165	1.710	98.45	0.70	23.62	4.04	24.03
Co1412-3-1	0.205	2.155	99.36	0.30	23.66	1.70	23.83
Co1412-3-1	0.245	2.613	99.07	0.30	23.57	1.71	23.74
Co1412-3-1	0.285	3.034	99.39	0.27	23.00	1.56	23.14
Co1412-3-1	0.325	3.431	98.74	0.26	24.06	1.50	24.21
Co1412-3-1	0.365	3.834	99.45	0.29	23.94	1.65	24.11
Co1412-3-1	0.405	4.258	99.52	0.24	24.07	1.36	24.21
Co1412-3-1	0.425	4.449	99.72	0.28	24.60	1.61	24.78
Co1412-3-1	0.445	4.640	99.27	0.39	24.12	2.27	24.36
Co1412-3-1	0.455	4.737	99.76	0.24	24.49	1.36	24.64
Co1412-3-1	0.485	5.033	98.94	0.32	24.88	1.86	25.09
Co1412-3-1	0.505	5.241	98.79	0.30	23.06	1.70	23.22
Co1412-3-1	0.525	5.481	99.49	0.25	24.77	1.43	24.93
Co1412-3-1	0.545	5.721	99.20	0.31	24.77	1.81	24.98
Co1412-3-1	0.565	5.949	99.40	0.26	24.17	1.49	24.32
Co1412-3-1	0.585	6.173	99.58	0.28	24.38	1.61	24.56
Co1412-3-1	0.605	6.395	99.52	0.25	24.33	1.45	24.48
Co1412-3-1	0.625	6.611	99.68	0.32	24.76	1.83	24.97
Co1412-3-1	0.645	6.826	99.33	0.30	24.85	1.70	25.04
Co1412-3-1	0.665	7.040	99.71	0.29	27.29	1.65	27.51
Co1412-3-1	0.685	7.252	99.08	0.50	25.17	2.90	25.50
Co1412-3-1	0.705	7.466	99.52	0.35	24.72	2.01	24.94
Co1412-3-1	0.725	7.685	99.37	0.35	24.26	1.99	24.47
Co1412-3-1	0.745	7.905	98.82	0.46	27.47	2.63	27.84
Co1412-3-1	0.765	8.118	99.25	0.46	24.86	2.63	25.15
Co1412-3-1	0.785	8.331	99.65	0.35	26.29	2.03	26.55
Co1412-3-1	0.805	8.543	99.23	0.28	25.23	1.58	25.41
Co1412-3-1	0.825	8.758	99.26	0.26	25.28	1.51	25.46
Co1412-3-1	0.845	8.973	99.12	0.27	26.54	1.56	26.74
Co1412-3-1	0.865	9.201	99.45	0.25	25.54	1.45	25.72
Co1412-3-1	0.885	9.432	99.40	0.25	27.15	1.45	27.34
Co1412-3-1	0.905	9.659	98.98	0.27	25.72	1.55	25.90
Co1412-3-1	0.925	9.872	99.15	0.31	26.51	1.76	26.74
Co1412-3-1	0.945	10.084	99.29	0.26	26.29	1.50	26.48
Co1412-3-1	0.965	10.312	98.17	0.79	26.10	4.57	26.68
Co1412-3-2	0.985	10.545	98.62	0.44	26.28	2.52	26.61
Co1412-3-2	1.025	11.001	98.30	0.85	26.72	4.89	27.38
Co1412-3-2	1.065	11.451	98.95	0.53	27.01	3.02	27.42
Co1412-3-2	1.085	11.674	99.23	0.43	25.21	2.48	25.50
Co1412-3-2	1.125	12.133	99.20	0.43	26.34	2.45	26.65
Co1412-3-2	1.165	12.576	99.26	0.40	25.39	2.32	25.66
Co1412-3-2	1.195	12.889	99.14	0.31	26.75	1.76	26.98
Co1412-3-2	1.225	13.175	99.03	0.10	26.04	0.56	26.10