Citation:

PANGAEA.914876

Name: Detailed core log of deep permafrost core YUK15-Alas1
Published: 2020-04-16
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Alas; Carbon; Central Yakutia; Permafrost; Yedoma; Yukechi

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Abstract:

This file presents the detailed description of two deep permafrost cores from the Yukechi Alas landscape in Central Yakutia, Russia. These data were recorded during subsampling of the cores and are based on visual and haptic impression. The core "Alas1" represents an adjacent alas deposit. Core was obtained during field work in March 2015.

Keyword(s):

Alas; Carbon; Central Yakutia; Permafrost; Yedoma; Yukechi

Related to:

Windirsch, Torben; Grosse, Guido; Ulrich, Mathias; Schirrmeister, Lutz; Fedorov, Alexander N; Konstantinov, Pavel; Fuchs, Matthias; Jongejans, Loeka Laura; Wolter, Juliane; Opel, Thomas; Strauss, Jens (2020): Organic carbon characteristics in ice-rich permafrost in alas and Yedoma deposits, central Yakutia, Siberia. Biogeosciences, 17, 3797–3814, https://doi.org/10.5194/bg-17-3797-2020

Windirsch, Torben; Grosse, Guido; Ulrich, Mathias; Schirrmeister, Lutz; Fedorov, Alexander N; Konstantinov, Pavel; Fuchs, Matthias; Strauss, Jens (2019): Organic material, sediment and ice characteristics of two permafrost cores from Yukechi Alas, Central Yakutia. PANGAEA, https://doi.org/10.1594/PANGAEA.898754

Project(s):

Permafrost Research (AWI_Perma)

Polar Terrestrial Environmental Systems @ AWI (AWI_Envi)

Rapid Permafrost Thaw in a Warming Arctic and Impacts on the Soil Organic Carbon Pool (PETA-CARB)

Funding:

Seventh Framework Programme (FP7), grant/award no. 338335 : Rapid Permafrost Thaw in a Warming Arctic and Impacts on the Soil Organic Carbon Pool

Coverage:

Latitude: 61.764900 * Longitude: 130.465030

Date/Time Start: 2015-03-22T00:00:00 * Date/Time End: 2015-03-22T00:00:00

Minimum DEPTH, sediment/rock: 0.010 m * Maximum DEPTH, sediment/rock: 19.720 m

Event(s):

YUK15-Alas1 (Dry alas center) * Latitude: 61.764900 * Longitude: 130.465030 * Date/Time: 2015-03-22T00:00:00 * Penetration: 19.80 m * Campaign: (Central_Yakutia_Yukechi_2015) * Basis: AWI Arctic Land Expedition * Method/Device: Truck mounted rotary drill (RCDT) * Comment: Drilled in the drained part of a thermokarst lake basin,unfrozen conditions from ~1,6 to ~7,5 m. Drilled in March 2015 from dry land surface. From 0 m to 19.80 m (length: 19.80 m).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Section	Sect		Windirsch, Torben	Drive
2	Depth, top/min	Depth top	m	Windirsch, Torben	bs
3	Depth, top/min	Depth top	m	Windirsch, Torben	bs
4	DEPTH, sediment/rock	Depth sed	m	Windirsch, Torben	Geocode – bs
5	State of permafrost	State		Windirsch, Torben
6	Sediment type	Sediment		Windirsch, Torben
7	Color description	Color desc		Windirsch, Torben	sediment
8	Sediment contact to bottom unit	Sediment contact		Windirsch, Torben
9	Ground ice, cryostructure	Ground ice cryostructure		Windirsch, Torben
10	Ground ice, contact to bottom unit	Ground ice contact		Windirsch, Torben
11	Organic matter	OM		Windirsch, Torben
12	Observation	Obs		Windirsch, Torben	additional
13	Uniform resource locator/link to image	URL image		Windirsch, Torben

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Size:

595 data points

Data

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

1 Sect (Drive)	2 Depth top [m] (bs)	3 Depth top [m] (bs)	4 Depth sed [m] (bs)	5 State	6 Sediment	7 Color desc (sediment)	8 Sediment contact	9 Ground ice cryostructure	10 Ground ice contact	11 OM	12 Obs (additional)	13 URL image
I	0.00	0.64	0.320									Alas1_1.tif
I	0.00	0.02	0.010	-	organic toplayer; recent vegetation	-	-	-	-	-		Alas1_1.tif
I	0.02	0.09	0.055	-	blackish silt	-	sharp	non-visible	-	recent roots,		Alas1_1.tif
I	0.09	0.64	0.365	frozen	sandy silt	brownish grey	-	horizontal lenses up to 1 cm length, 1 mm thick	-	12-16 cm: macro roots (recent?), 0,5 cm thick; 57 cm: black dotted organic layer		Alas1_1.tif
II	0.64	1.10	0.870	frozen	sandy silt	brownish grey	-	horizontal lenses up to 1 cm length, 1 mm wide; 68-70 cm: wavy lenses	-	few small back dots up to 2 mm width; 74-78 cm: blackish organic lenses up to 2 mm wide; 88 cm: coal (0,5 cm long, vertical); few larger areas of darker brown colour - organic?		Alas1_2.tif
III	1.10	1.67	1.385									Alas1_2.tif
III	1.10	1.61	1.355	frozen	sandy silt	brownish grey	-	horizontal lenses, 1 mm wide, up to 5 cm length	-	small blackish dots up to 2 mm		Alas1_2.tif
III	1.61	1.62	1.615	frozen	sandy silt	brownish grey	-	chaotic lenses up to 2 mm width	-	-		Alas1_2.tif
III	1.62	1.67	1.645	frozen	sandy silt	brownish grey	-	non-visible	-	small blackish dots		Alas1_2.tif
IV	1.67	2.25	1.960									Alas1_4.tif
IV	1.67	1.84	1.755	unfrozen	sandy silt; yellow-brown areas (oxidation?)	brownish grey	-	-	-	small dark dots up to 1 mm		Alas1_4.tif
IV	1.84	2.25	2.045	unfrozen	silt; yellow-brown areas (oxidation?)	brwonish grey	-	-	-	small dark dots up to 1 mm		Alas1_4.tif
V	2.25	4.00	3.125									Alas1_5.tif
V	2.25	3.40	2.825	-	-	-	-	-	-	-	core loss	Alas1_5.tif
V	3.40	3.47	3.435	unfrozen	silt	brownish grey	-	-	-	white dots (calcarious remains?)		Alas1_5.tif
V	3.47	3.73	3.600	unfrozen	silt	rownish grey	-	-	-	355 cm: brown dot; 367-373 cm: brown lenses		Alas1_5.tif
V	3.73	3.83	3.780	unfrozen	clayish silt	darker than above	-	-	-	light brown lenses (?)		Alas1_5.tif
V	3.83	4.00	3.915	unfrozen	sand	grey	-	-	-	white and black dots, 1mm diameter		Alas1_5.tif
VI	4.00	4.60	4.300									Alas1_6.tif
VI	4.00	4.40	4.200	-	-	-	-	-	-	-	core loss	Alas1_6.tif
VI	4.40	4.60	4.500	unfrozen	sand	grey	-	-	-	-		Alas1_6.tif
VII	4.60	6.60	5.600
VII	4.60	6.40	5.500	-	-	-	-	-	-	-	core loss
VII	6.40	6.60	6.500	unfrozen	sand + silty parts	grey	-	-	-	-	brownish areas (oxidation?)
VIII	6.60	8.40	7.500									Alas1_8.tif
VIII	6.60	8.00	7.300	-	-	-	-	-	-	-	core loss	Alas1_8.tif
VIII	8.00	8.40	8.200	unfrozen	sand	grey	-	-	-	-		Alas1_8.tif
IX	8.40	9.60	9.000									Alas1_9.tif
IX	8.40	9.14	8.770	-	-	-	-	-	-	-	core loss	Alas1_9.tif
IX	9.14	9.34	9.240	frozen	sand; 927-931 cm: finer	grey	sharp	structureless non-visible; 927-931 cm: spare ice lenses	transit	927-931 cm: brown diagonal bands		Alas1_9.tif
IX	9.34	9.60	9.470	frozen	silt	brownish grey		structureless non-visible; 960 cm: two thin ice bands, horizontal, 0,5 mm		944-947 cm: blackish dots; 946 + 946 + 958 cm: up to 1 cm wide peat inclusion		Alas1_9.tif
X	9.60	12.10	10.850									Alas1_10.tif
X	9.60	10.88	10.240	-	-	-	-	-	-	-	core loss	Alas1_10.tif
X	10.88	11.09	10.985	? Refrozen after drilling?	silt	brownish grey	sharp	horizontal to diagonal ice bands up to 2 mm wide; partly chaotic	transit	white dots up to 1 mm	brownish areas (oxidation?)	Alas1_10.tif
X	11.09	11.42	11.255	?	silt	grey	-	horizontal to diagonal ice bands up to 2 mm wide; partly chaotic	sharp	white dots up to 1 mm	1133 brownish horizontal interlayer (oxidation?)	Alas1_10.tif
X	11.42	11.75	11.585	frozen	silt	grey	-	non-visible	sharp	few black dots up to 1 mm	1150-1155 white horizontal structures; 1169-1175 whuite vertical structure; 1161-1162 brownish interlayer, horizontally structured;	Alas1_10.tif
X	11.75	11.82	11.785	frozen	silt	grey	-	chaotic/reticulated ice bands, 1 mm width	sharp	-		Alas1_10.tif
X	11.82	11.90	11.860	frozen	silt	grey	-	few horizontal ice lenses	sharp	-		Alas1_10.tif
X	11.90	12.10	12.000	frozen	silt	grey	-	reticulated ice bands up to 3 mm width	transit	-		Alas1_10.tif
XI	12.10	13.50	12.800									Alas1_11.tif
XI	12.10	12.36	12.230	frozen	clayish silt	dark grey	transit	structureless non-visible	-	-		Alas1_11.tif
XI	12.36	13.04	12.700	frozen	clayish silt; 1260 cm: sand lense 2 cm horizontal, 0.5 cm vertical	dark grey	transit	structureless non-visible	-	black dots up to 3 mm ; 1381-1386 cm: more		Alas1_11.tif
XI	13.04	13.07	13.055	frozen	clayish silt	dark grey	transit	diagonal-horizontal macro lenses	-	-		Alas1_11.tif
XI	13.07	13.24	13.155	frozen	clayish silt	dark grey	transit	structureless non-visible	-	-		Alas1_11.tif
XI	13.24	13.28	13.260	frozen	clayish silt	darker than above	sharp	reticular	-	-		Alas1_11.tif
XI	13.28	13.50	13.390	frozen	clayish silt	dark grey	-	structureless non-visible	-	black dots up to 3 mm		Alas1_11.tif
XII	13.66	14.80	14.230									Alas1_12.tif
XII	13.66	13.91	13.785	frozen	silt	brownish grey	-	structureless non-visible	-	-		Alas1_12.tif
XII	13.91	14.10	14.005	frozen	silt; 1405 cm: sand lense	brownish grey	-	structureless non-visible	-	-	core packed in a back, order unclear	Alas1_12.tif
XII	14.10	14.30	14.200	frozen	silt	brownish grey	-	structureless non-visible	-	-		Alas1_12.tif
XII	14.30	14.35	14.325	frozen	clayish silt	dark horizon: blackish grey	sharp with light band	structureless non-visible	-	very small brown dots: twigs?		Alas1_12.tif
XII	14.35	14.42	14.385	frozen	silt	lighter than above, darker than below	sharp	few micro lenses (in lower part)	-	horizontal lense, 1 cm		Alas1_12.tif
XII	14.42	14.80	14.610	frozen	sandy silt	grey	-	structureless non-visible	-	-		Alas1_12.tif
XIII	15.27	16.20	15.735									Alas1_13.tif
XIII	15.27	15.37	15.320	frozen	clayish silt	grey	transit	structureless non-visible		black dots up to 0.5 cm		Alas1_13.tif
XIII	15.37	16.20	15.785	frozen	clayish silt	grey	-	1546-1553 cm: micro lenses		very small black dots up to 1 mm		Alas1_13.tif
XIV	16.91	18.30	17.605	frozen	clayish silt	grey	-	structureless non-visible; 1827-1828 cm: vertical-diagonal ice lenses up to 1 cm width	-	black dots: 1706-172 cm, 1742 cm, 1771-1778 cm; brown macro-rmain: 1760 cm, 1773 cm		Alas1_14.tif
XV	18.97	19.80	19.385									Alas1_15.tif
XV	18.97	19.05	19.010	frozen	clayish silt	grey	transit	structureless non-visible	-	eqally spread small brown lenses < 1mm		Alas1_15.tif
XV	19.05	19.11	19.080	frozen	clayish silt	grey; brownish structure 1907-1909	transit	structureless non-visible	-	upper part: black dots < 2 mm, lower part brown dots (twigs?)		Alas1_15.tif
XV	19.11	19.64	19.375	frozen	clayish silt	grey	transit	structureless non-visible	-	black dots up to 1 cm		Alas1_15.tif
XV	19.64	19.80	19.720	frozen	clayish silt	grey	-	structureless non-visible	-	brown lenses up to 1 mm		Alas1_15.tif