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Painer, Florian; Drury, Martyn R; Hamers, Maartje F; Weikusat, Ilka (2026): Electron Backscatter Diffraction analysis on air hydrates of the EDML ice core [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.992544 (DOI registration in progress)

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Published: 2026-04-09

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Abstract:
In the deeper part of polar ice sheets, air hydrates are the primary air inclusions. They trap most of the ancient air molecules used for paleoclimatic reconstructions in their crystal structure. This dataset presents the first Electron Backscatter Diffraction (EBSD) measurements on air hydrates included in the EDML ice core. The sample was originally located at 2045.3 m depth. EBSD is a technique to characterize the microstructure of materials, which includes the precise determination of crystallographic orientations of measured materials. The measurements were taken by Florian Painer, Martyn Drury and Maartje Hamers at the University of Utrecht. The aim was to investigate the crystallographic nature and measure the crystallographic orientation of air hydrates included in polar ice. We thank Eric Hellebrand and Erik Betz-Güttner for their support in operating the Cryo-SEM. Access to the Cryo-SEM at MINT-UU (Utrecht University) was provided by EPOS-NL Facility Access, supported by the Dutch Research Council (NWO).
Keyword(s):
air hydrates; Antarctica; Cryo-SEM; EBSD analysis; Ice core
Related to:
Weikusat, Ilka; de Winter, Niels J; Pennock, Gillian M; Hayles, Michael F; Schneijdenberg, Chris T W M; Drury, Martyn R (2011): Cryogenic EBSD on ice: preserving a stable surface in a low pressure SEM. Journal of Microscopy, 242(3), 295-310, https://doi.org/10.1111/j.1365-2818.2010.03471.x
Funding:
Horizon 2020 (H2020), grant/award no. 955750: Research and training network on understanding Deep icE corE Proxies to Infer past antarctiC climatE dynamics (DEEPICE)
Coverage:
Latitude: -75.002500 * Longitude: 0.068400
Date/Time Start: 2024-05-02T13:53:00 * Date/Time End: 2024-05-02T15:58:00
Minimum Elevation: 2891.7 m * Maximum Elevation: 2891.7 m
Event(s):
EDML (EPICA Dronning Maud Land, DML28C01_00) * Latitude: -75.002500 * Longitude: 0.068400 * Date/Time Start: 2001-01-10T00:00:00 * Date/Time End: 2006-01-17T00:00:00 * Elevation: 2891.7 m * Recovery: 2774.15 m * Campaign: EPICA-Campaigns * Basis: Kohnen Station * Method/Device: EPICA drill (EDRILL) * Comment: Elevation is given with reference to WGS84
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Sample code/labelSample labelPainer, Florian
2 DATE/TIMEDate/TimePainer, FlorianGeocode
3 Temperature, deviceT Device°CPainer, FlorianCryo Preparation System, Quorum Technologies, PP3010cold stage temperature of scanning electron microscope (SEM)
4 ImageIMAGEPainer, FlorianScanning electron microscope (SEM), Zeiss, Gemini 450SEM image
5 SiteSitePainer, FlorianAZtec software, Oxford InstrumentsEBSD site
6 Point IDPoint IDPainer, FlorianAZtec software, Oxford InstrumentsEBSD point
7 PhasePhasePainer, FlorianAZtec software, Oxford Instruments
8 AngleAngledegPainer, FlorianAZtec software, Oxford InstrumentsEuler angle 1 (Z)
9 AngleAngledegPainer, FlorianAZtec software, Oxford InstrumentsEuler angle 2 (X')
10 AngleAngledegPainer, FlorianAZtec software, Oxford InstrumentsEuler angle 3 (Z'')
11 ImageIMAGEPainer, FlorianAZtec software, Oxford InstrumentsEBSD pattern
12 ImageIMAGEPainer, FlorianAZtec software, Oxford InstrumentsEBSD pattern indexed
13 CommentCommentPainer, Florian
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
373 data points

Data

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1 
Sample label		2 
Date/Time		3 
T Device [°C]
(cold stage temperature of sca...)		4 
IMAGE
(SEM image, Scanning electron ...)		5 
Site
(EBSD site, AZtec software, Ox...)		6 
Point ID
(EBSD point, AZtec software, O...)		7 
Phase
(AZtec software, Oxford Instru...)		8 
Angle [deg]
(Euler angle 1 (Z), AZtec soft...)		9 
Angle [deg]
(Euler angle 2 (X'), AZtec sof...)		10 
Angle [deg]
(Euler angle 3 (Z''), AZtec so...)		11 
IMAGE
(EBSD pattern, AZtec software,...)		12 
IMAGE
(EBSD pattern indexed, AZtec s...)		13 
Comment
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif321Air clathrate hydrate sII254.8623.1632.93EBSD_Site3_Point21.pngEBSD_Site3_Point21_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif322Air clathrate hydrate sII60.0347.5550.78EBSD_Site3_Point22.pngEBSD_Site3_Point22_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif328Air clathrate hydrate sII59.9547.4350.14EBSD_Site3_Point28.pngEBSD_Site3_Point28_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif329Air clathrate hydrate sII59.9248.1351.25EBSD_Site3_Point29.pngEBSD_Site3_Point29_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif331Air clathrate hydrate sII60.0747.8850.65EBSD_Site3_Point31.pngEBSD_Site3_Point31_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif334Air clathrate hydrate sII252.1523.5736.33EBSD_Site3_Point34.pngEBSD_Site3_Point34_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif436Air clathrate hydrate sII60.1047.6649.89EBSD_Site4_Point36.pngEBSD_Site4_Point36_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif438Air clathrate hydrate sII251.9123.5036.01EBSD_Site4_Point38.pngEBSD_Site4_Point38_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif439Air clathrate hydrate sII60.5847.9450.34EBSD_Site4_Point39.pngEBSD_Site4_Point39_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif440Air clathrate hydrate sII61.6147.7549.22EBSD_Site4_Point40.pngEBSD_Site4_Point40_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif441Air clathrate hydrate sII60.0248.0850.85EBSD_Site4_Point41.pngEBSD_Site4_Point41_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif442Air clathrate hydrate sII60.3847.0649.87EBSD_Site4_Point42.pngEBSD_Site4_Point42_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif443Air clathrate hydrate sII253.1323.1934.51EBSD_Site4_Point43.pngEBSD_Site4_Point43_indexed.png
EDML_2046_3_12024-05-02T15:07:00-902046_3_1_075.tif7110Air clathrate hydrate sII176.4927.0745.22EBSD_Site7_Point110.pngEBSD_Site7_Point110_indexed.png
EDML_2046_3_12024-05-02T15:25:00-802046_3_1_082.tif8118Air clathrate hydrate sII291.1337.8517.43EBSD_Site8_Point118.pngEBSD_Site8_Point118_indexed.png
EDML_2046_3_12024-05-02T15:25:00-802046_3_1_082.tif8120Air clathrate hydrate sII291.9437.4316.11EBSD_Site8_Point120.pngEBSD_Site8_Point120_indexed.png
EDML_2046_3_12024-05-02T15:25:00-802046_3_1_082.tif8122Air clathrate hydrate sII291.6437.5716.60EBSD_Site8_Point122.pngEBSD_Site8_Point122_indexed.png
EDML_2046_3_12024-05-02T15:40:00-802046_3_1_087.tif11183Air clathrate hydrate sII61.3448.0949.22EBSD_Site11_Point183.pngEBSD_Site11_Point183_indexed.png
EDML_2046_3_12024-05-02T15:40:00-802046_3_1_087.tif11185Air clathrate hydrate sII254.0022.5134.39EBSD_Site11_Point185.pngEBSD_Site11_Point185_indexed.png
EDML_2046_3_12024-05-02T15:40:00-802046_3_1_087.tif11186Air clathrate hydrate sII253.8822.9434.15EBSD_Site11_Point186.pngEBSD_Site11_Point186_indexed.png
EDML_2046_3_12024-05-02T15:40:00-802046_3_1_087.tif11188Air clathrate hydrate sII254.8623.1833.58EBSD_Site11_Point188.pngEBSD_Site11_Point188_indexed.png
EDML_2046_3_12024-05-02T15:40:00-802046_3_1_087.tif11194Air clathrate hydrate sII248.9823.8039.08EBSD_Site11_Point194.pngEBSD_Site11_Point194_indexed.png
EDML_2046_3_12024-05-02T15:40:00-802046_3_1_087.tif11195Air clathrate hydrate sII253.8723.3434.35EBSD_Site11_Point195.pngEBSD_Site11_Point195_indexed.png
EDML_2046_3_12024-05-02T15:56:00-702046_3_1_093.tif12203Air clathrate hydrate sII293.1438.0414.97EBSD_Site12_Point203.pngEBSD_Site12_Point203_indexed.png
EDML_2046_3_12024-05-02T15:56:00-702046_3_1_093.tif12206Air clathrate hydrate sII292.0137.0316.09EBSD_Site12_Point206.pngEBSD_Site12_Point206_indexed.png
EDML_2046_3_12024-05-02T15:56:00-702046_3_1_093.tif12208Air clathrate hydrate sII291.6036.1016.93EBSD_Site12_Point208.pngEBSD_Site12_Point208_indexed.png
EDML_2046_3_12024-05-02T15:56:00-702046_3_1_093.tif12220Air clathrate hydrate sII175.9927.3146.79EBSD_Site12_Point220.pngEBSD_Site12_Point220_indexed.png
EDML_2046_3_12024-05-02T15:58:00-702046_3_1_094.tif13243Air clathrate hydrate sII172.3428.0249.91EBSD_Site13_Point243.pngEBSD_Site13_Point243_indexed.png
EDML_2046_3_12024-05-02T15:58:00-702046_3_1_094.tif13239Air clathrate hydrate sIIEBSD_Site13_Point239.pngEBSD_Site13_Point239_indexed.pngEuler angle measurements were unforunately lost during data backup. This pattern might indicate a different orientation which could not be resolved yet.
EDML_2046_3_12024-05-02T13:53:00-1102046_3_1_052.tif12Hexagonal ice15.0490.414.27EBSD_Site1_Point2.pngEBSD_Site1_Point2_indexed.png
EDML_2046_3_12024-05-02T13:53:00-1102046_3_1_052.tif15Hexagonal ice170.0198.1758.18EBSD_Site1_Point5.pngEBSD_Site1_Point5_indexed.png
EDML_2046_3_12024-05-02T13:53:00-1102046_3_1_052.tif16Hexagonal ice102.29140.0159.36EBSD_Site1_Point6.pngEBSD_Site1_Point6_indexed.png
EDML_2046_3_12024-05-02T13:53:00-1102046_3_1_052.tif17Hexagonal ice122.2591.4041.97EBSD_Site1_Point7.pngEBSD_Site1_Point7_indexed.png
EDML_2046_3_12024-05-02T14:54:00-902046_3_1_069.tif326Hexagonal ice15.9491.944.57EBSD_Site1_Point1.pngEBSD_Site1_Point1_indexed.pngRepresentative EBSD pattern and indexing