Citation:

PANGAEA.929441

Name: Oxygen isotope composition of diatoms from Lake Kotokel (southern Siberia, Russia)
Published: 2021-03-19
License: https://creativecommons.org/licenses/by/4.0/
Keywords: biogenic silica; Climate changes; hydrological changes; isotope analysis; southern Siberia

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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):

biogenic silica; Climate changes; hydrological changes; isotope analysis; southern Siberia

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):

Polar Terrestrial Environmental Systems @ AWI (AWI_Envi)

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

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]
KTK2-S-0-180	0.020	0.031	98.81	0.47	26.80	3.4	27.46
KTK2-S-0-180	0.170	0.497			25.36
KTK2-S-0-180	0.290	0.870	98.80	0.44	25.87	3.2	26.45
KTK2-S-0-180	0.350	1.057	98.60	0.57	23.66	4.1	24.33
KTK2-S-0-180	0.400	1.212	98.25	0.24	23.45	1.7	23.72
KTK2-S-0-180	0.450	1.368	97.29	0.81	25.63	5.8	26.72
KTK2-S-0-180	0.490	1.492	97.66	0.86	26.57	6.2	27.79
KTK2-S-0-180	0.550	1.679	97.39	1.00	26.43	7.2	27.85
KTK2-S-0-180	0.600	1.834	97.99	0.74	25.20	5.3	26.16
KTK2-S-0-180	0.650	1.990			25.60
KTK2-S-0-180	0.690	2.114			24.50
KTK2-S-0-180	0.750	2.300	96.69	1.57	25.05	11.3	27.21
KTK2-S-0-180	0.800	2.456	98.18	0.61	26.68	4.4	27.53
KTK2-S-0-180	0.850	2.611	95.83	1.61	24.93	11.6	27.14
KTK2-S-0-180	0.890	2.728	97.48	1.01	28.22	7.3	29.80
KTK2-S-0-180	0.950	2.922	98.22	0.56	27.90	4.0	28.73
KTK2-S-0-180	1.000	3.078	98.81	0.30	28.17	2.2	28.61
KTK2-S-0-180	1.070	3.295	98.93	0.35	28.36	2.5	28.88
KTK2-S-0-180	1.200	3.699	98.07	0.68	27.60	4.9	28.60
KTK2-S-0-180	1.290	3.979	98.76	0.55	27.83	4.0	28.64
KTK2-S-180-360	1.590	4.555	98.28	0.61	27.94	4.4	28.85
KTK2-S-180-360	1.630	4.608	98.01	2.58	19.39	18.6
KTK2-S-180-360	1.690	4.687	98.45	0.52	28.11	3.7	28.89
KTK2-S-180-360	1.810	4.846	96.24	1.45	27.66	10.4	29.94
KTK2-S-180-360	1.890	4.952	98.93	0.19	28.83	1.4	29.86
KTK2-S-180-360	1.950	5.031	98.67	0.40	25.90	2.9	26.43
KTK2-S-180-360	2.050	5.164	98.32	0.63	27.71	4.5	28.64
KTK2-S-180-360	2.130	5.276	98.72	0.82	28.27	5.9	29.54
KTK2-S-180-360	2.210	5.400	98.96	0.29	28.24	2.1	28.67
KTK2-S-180-360	2.300	5.539	98.97	0.41	28.92	2.9	29.55
KTK2-S-180-360	2.350	5.616	98.86	0.45	28.51	3.2	29.19
KTK2-S-180-360	2.410	5.708	98.26	0.81	28.42	5.8	29.68
KTK2-S-180-360	2.450	5.770	98.94	0.49	29.07	3.5	29.84
KTK2-S-180-360	2.510	5.863	98.81	0.48	28.83	3.5	29.57
KTK2-S-180-360	2.550	5.924	98.52	0.57	28.45	4.1	29.32
KTK2-S-180-360	2.590	5.986	97.97	0.79	28.17	5.7	29.38
KTK2-S-360-540	2.635	6.056	99.55	0.16	28.37	1.2	28.61
KTK2-S-360-540	2.695	6.148	99.01	0.42	26.87	3.0	27.46
KTK2-S-360-540	2.755	6.241	96.73	1.57	25.98	11.3	28.26
KTK2-S-360-540	2.835	6.364	99.30	0.17	28.22	1.2	28.47
KTK2-S-360-540	2.875	6.426	99.29	0.27	28.90	1.9	29.31
KTK2-S-360-540	2.975	6.558	98.62	0.55	25.83	4.0	26.56
KTK2-S-360-540	3.015	6.606	98.70	0.56	29.22	4.0	30.11
KTK2-S-360-540	3.075	6.678	99.40	0.12	27.70	0.9	27.87
KTK2-S-360-540	3.155	6.877	99.27	0.26	27.48	1.9	27.85
KTK2-S-360-540	3.215	7.087	99.47	0.09	28.73	0.6	28.86
KTK2-S-360-540	3.275	7.297	99.35	0.19	28.66	1.4	28.95
KTK2-S-360-540	3.335	7.506	98.28	0.20	27.58	1.4	27.86
KTK2-S-360-540	3.395	7.716	98.91	0.29	27.63	2.1	28.05
KTK2-S-360-540	3.455	7.926	98.10	0.58	27.02	4.2	27.85
KTK2-S-360-540	3.515	8.136	98.71	0.48	29.08	3.5	29.83
KTK2-S-360-540	3.555	8.276	98.88	0.41	27.74	2.9	28.34
KTK2-S-360-540	3.595	8.415	98.15	0.59	27.95	4.2	28.83
KTK2-S-360-540	3.655	8.625	99.14	0.52	27.82	3.7	28.59
KTK2-S-360-540	3.695	8.765	97.96	1.00	28.35	7.2	29.92
KTK2-S-360-540	3.755	8.975	98.58	0.18	28.94	1.3	29.21
KTK2-S-360-540	3.815	9.184	98.75	0.47	26.93	3.4	27.59
KTK2-S-360-540	3.875	9.394	98.58	0.60	26.69	4.3	27.53
KTK2-S-360-540	3.935	9.604	99.50	0.00	28.69	0.0	28.69
KTK2-S-360-540	3.995	9.814	99.29	0.13	27.94	0.9	28.13
KTK2-S-360-540	4.055	10.023	99.46	0.12	28.20	0.9	28.38
KTK2-S-360-540	4.115	10.233	99.10	0.23	29.69	1.7	30.05
KTK2-S-540-720	4.240	10.625	99.50	0.08	28.79	0.6	28.91
KTK2-S-540-720	4.300	10.700	98.26	0.53	24.50	3.8	25.15
KTK2-S-540-720	4.340	10.750	99.29	0.07	29.34	0.5	29.45
KTK2-S-540-720	4.380	10.800	99.18	0.08	30.06	0.6	30.19
KTK2-S-540-720	4.440	10.875	99.63	0.00	30.21	0.0	30.21
KTK2-S-540-720	4.500	10.950	99.38	0.10	29.28	0.7	29.43
KTK2-S-540-720	4.540	11.000	99.23	0.09	29.53	0.6	29.67
KTK2-S-540-720	4.580	11.050	99.32	0.07	29.62	0.5	29.73
KTK2-S-540-720	4.620	11.100	99.93	0.36	28.11	2.6	28.64
KTK2-S-540-720	4.680	11.175	99.59	0.01	29.92	0.1	29.94
KTK2-S-540-720	4.720	11.225	99.48	0.12	30.05	0.9	30.24
KTK2-S-540-720	4.800	11.325	99.05	0.22	29.66	1.6	30.01
KTK2-S-540-720	4.840	11.375	98.96	0.31	29.43	2.2	29.92
KTK2-S-540-720	4.900	11.450	98.34	0.61	28.29	4.4	29.22
KTK2-S-540-720	4.980	11.550	97.73	0.93	28.85	6.7	30.34
KTK2-S-540-720	5.030	11.613	99.18	0.30	30.57	2.2	31.07
KTK2-S-540-720	5.110	11.766	99.17	0.20	30.08	1.4	30.40
KTK2-S-540-720	5.180	11.998	99.35	0.09	30.77	0.6	30.92
KTK2-S-540-720	5.300	12.346	99.69	0.08	28.91	0.6	29.03
KTK2-S-540-720	5.370	12.549	99.50	0.04	30.31	0.3	30.37
KTK2-S-720-900	5.445	12.728	98.65	0.35	29.90	2.5	30.40
KTK2-S-720-900	5.475	12.776	98.42	0.48	29.94	3.4	30.63
KTK2-S-720-900	5.515	12.840	97.98	0.65	29.69	4.6	30.63
KTK2-S-720-900	5.575	12.936	98.16	0.70	29.85	4.9	30.87
KTK2-S-720-900	5.615	13.000	96.79	1.19	28.69	8.4	30.39
KTK2-S-720-900	5.655	13.087	95.83	1.16	29.17	8.2	30.86
KTK2-S-720-900	5.695	13.174	96.39	1.54	28.56	10.8	30.80
KTK2-S-720-900	5.755	13.304	96.22	1.89	27.20	13.3	29.82
KTK2-S-720-900	5.815	13.434	96.18	2.23	27.74	15.7	31.02
KTK2-S-720-900	5.855	13.520	95.53	1.82	26.17	12.8	28.53
KTK2-S-720-900	5.895	13.607	94.02	2.02	27.35	14.2	30.20
KTK2-S-720-900	5.955	13.694	95.65	2.36	27.54	16.6	31.01
KTK2-S-720-900	6.015	13.761	97.65	1.30	28.85	9.2	30.73
KTK2-S-720-900	6.055	13.806	96.40	1.74	27.78	12.3	30.24
KTK2-S-720-900	6.115	13.876	97.68	0.99	29.17	7.0	30.60
KTK2-S-720-900	6.175	13.955	97.22	1.44	27.77	10.1	29.76
KTK2-S-720-900	6.255	14.059	90.80	4.90	23.61	34.5
KTK2-S-720-900	6.295	14.112	96.16	1.73	27.89	12.2	30.35
KTK2-S-720-900	6.355	14.190	97.92	1.07	27.31	7.5	30.32
KTK2-S-720-900	6.415	14.269	96.41	1.91	25.47	13.5	26.72
KTK2-S-720-900	6.475	14.348	96.37	1.74	26.97	12.3	29.32
KTK2-S-720-900	6.535	14.445	96.21	2.12	28.02	14.9	31.16
KTK2-S-720-900	6.575	14.534	92.43	3.53	22.60	24.9
KTK2-S-720-900	6.615	14.623	96.71	1.60	27.52	11.3	29.73
KTK2-S-720-900	6.795	15.023	92.86	3.87	23.68	27.3
KTK2-S-900-1080	7.140	16.743	97.10	1.30	26.03	9.2	27.63
KTK2-S-1080-1240	8.425	22.985	95.23	2.86	25.13	20.1
KTK2-S-1080-1240	8.465	23.114	98.90	0.26	29.19	1.8	29.55
KTK2-S-1080-1240	8.485	23.178	96.26	1.72	25.67	12.1	27.81
KTK2-S-1080-1240	8.525	23.307	97.22	0.88	29.04	6.2	30.29
KTK2-S-1080-1240	8.575	23.468	93.56	3.57	20.92	25.1
KTK2-S-1080-1240	8.665	23.757	91.45	4.22	19.76	29.7
KTK2-S-1080-1240	8.825	24.273	93.27	3.72	24.00	26.2
KTK2-S-1080-1240	8.925	24.595	94.20	1.41	28.52	9.9	30.55
KTK2-S-1240-1440	10.455	32.846	97.57	0.65	26.71	4.4	27.49
KTK2-S-1240-1440	10.495	33.121	98.35	0.51	26.68	3.5	27.28
KTK2-S-1240-1440	10.535	33.396	98.71	0.58	27.15	4.0	27.86
KTK2-S-1240-1440	10.615	33.946	99.25	0.42	25.43	2.9	25.89
KTK2-S-1240-1440	10.655	34.221	98.71	0.70	26.83	4.8	27.68
KTK2-S-1240-1440	10.695	34.496	98.37	0.60	26.76	4.1	27.48
KTK2-S-1240-1440	10.735	34.771	98.74	0.37	25.27	2.5	25.67
KTK2-S-1240-1440	10.775	35.046	99.00	0.51	26.17	3.5	26.75
KTK2-S-1240-1440	10.815	35.321	97.67	0.96	26.70	6.5	27.87
KTK2-S-1240-1440	10.855	35.596	98.63	0.53	28.27	3.6	28.96
KTK2-S-1240-1440	10.935	36.146	97.68	1.17	26.67	8.0	28.12
KTK2-S-1240-1440	11.255	38.345	97.69	1.02	25.59	7.0	26.76
KTK2-S-1240-1440	11.375	39.170	97.56	0.78	27.63	5.3	28.62
KTK2-S-1240-1440	11.495	39.995	97.76	0.47	27.41	3.2	27.99
KTK2-S-1440-1535	11.825	42.264	98.22	0.28	29.03	1.9	29.40
KTK2-S-1440-1535	11.865	42.539	99.25	0.34	28.72	2.3	29.17
KTK2-S-1440-1535	11.905	42.814	99.21	0.45	29.13	3.1	29.74
KTK2-S-1440-1535	11.945	43.089	97.28	0.49	28.91	3.3	29.57
KTK2-S-1440-1535	11.985	43.364	99.24	0.37	29.44	2.5	29.94
KTK2-S-1440-1535	12.065	43.914	98.99	0.69	29.15	4.7	30.10
KTK2-S-1440-1535	12.105	44.189	99.24	0.28	29.38	1.9	29.76
KTK2-S-1440-1535	12.185	44.739	97.47	1.43	27.69	9.7	29.61
KTK2-S-1440-1535	12.225	45.014	97.40	1.51	27.91	10.3	29.97
KTK2-S-1440-1535	12.305	45.563	96.17	2.24	27.57	15.3	30.75
KTK2-S-1440-1535	12.365	45.976	97.23	1.12	25.17	7.6	26.43