Geochemical, lithological, and geochronological characteristics of sediment samples from Yedoma and thermokarst deposits, 1998-2016, Siberia (RU) and Alaska (US)

Strauss, Jens; Laboor, Sebastian; Schirrmeister, Lutz; Grosse, Guido; Fortier, Daniel; Hugelius, Gustaf; Knoblauch, Christian; Romanovsky, Vladimir E.; Schädel, Christina; Schneider von Deimling, Thomas; Schuur, Edward A. G.; Shmelev, Denis; Ulrich, Mathias; Veremeeva, Alexandra

This dataset merges data from the yedoma domain in Northern Siberia (RU) and Alaska (US). It includes numerous fieldwork campaigns, which take place since 1998 . In total 224 samples from drained Thermokarst, basins and 736 Yedoma samples are included from 27 sites (17 Siberia, 10 Alaska). The laboratory methods are the following: Total organic carbon (TOC) samples were measured with a carbon-nitrogen-sulphur analyser (Elementar Vario EL III) or a TOC analyser (Elementar Vario Max C). For ice content measurement needed for bulk density calculation (bulkdens), samples were weighed in wet and ovendry state during field expeditions or dried in the lab using a freeze dryer. BD was then calculated using its inverse relationship with porosity (see Strauss et al 2013 for details)). Because pore volume is assumed to be ice saturated, the pore volume can be directly inferred from the segregated ice content. Ice content was determined by dying in the file already or with an freeze dryer in the lab. 14C dates were compiled from different sources given with locations in Table S1 in the supplement of Strauss et al 2017. Areal estimation of yedoma and degraded sites were done with literature estimates including general estimates in Strauss et al 2013. Data from local- and regional-scale analyses of Yedoma deposit versus thermokarst-affected areas (summarised in Strauss et al 2013) indicate that ~70% of the Yedoma region area is affected by degradation. The remaining Yedoma deposit extent is ~416,000 km2. We further estimate that ~10% of the Yedoma region is covered with lakes and rivers and thus underlain by unfrozen deposits (150,000 km2) and ~4% is covered with other deposits including deltaic and fluvial sediments (50,000 km2), leaving ~56% (775,000 km2) of the Yedoma region covered by frozen thermokarst deposits in drained thermokarst lakes.

Detailed information about the methods can be found in Strauss et al 2013 and 2017 and the supplements (https://doi.org/doi:10.1002/2013GL058088, https://doi.org/10.1016/j.earscirev.2017.07.007).

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Strauss, Jens

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Data and Resources

Additional Info

Field Value
Identifier DOI:10.1594/PANGAEA.919064 (DOI registration in progress)
Project(s) Yedoma Action Group, PETA-CARB
Institute AWI Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research
Source https://doi.pangaea.de/10.1594/PANGAEA.919064
Publication Date 2020-06-17
Version 1.0
Product group
Product synthesis of yedoma and thermokarst characteristics
Sensor sample analysis
Files
  • Shapefile yedoma & thermokarst sites
  • tab file yedoma & thermokarst sites
  • tab file yedoma characterisitics data
  • tab file thermokarst characterisitics data
Variables [Units]
  • Event: Event label
  • ID: Identification (IDsite; IDsample)
  • Site: Site name
  • Area/locality: Main region
  • Latitude [dd]
  • Longitude [dd]
  • N (Yedoma samples): Sample amount [#]
  • N (thermokarst samples): Sample amount [#]
  • Thickness: Yedoma layer thickness [m]
  • Cov: Coverage (degradation affected area) [%]
  • Cov: Coverage (unaffected Yedoma uplands) [%]
  • BD perma: Yedoma density, bulk, permafrost [g/cm³]
  • Thickness: thermokarst deposits layer thickness [m]
  • BD perma: thermokarst density, bulk, permafrost [g/cm³]
  • Sample label: Sample code/label
  • Depth: depth sediment [m]
  • Height: Height above sea level [m a.s.l.]
  • Intraced ice: Ice content, intrasedimentary ice [%]
  • Ice wedge: Ice wedge content [%]
  • TOC: Carbon, organic, total [%]
  • δ13C [‰ PDB]
  • Age, dated: Age, radiocarbon [ka BP]
  • Age, e: Age error, radiocarbon [±]
Region Alaska, Northern Siberia
Spatial Reference EPSG:4326 WGS 84
Spatial Resolution
Spatial Coverage Latitude 65.06 to 76.17, Longitude -164.43 to 159.09
Temporal Coverage 2001 to 2016
Temporal Resolution
Format Shapefile, tab
Related to Strauss, Jens; Laboor, Sebastian; Fedorov, Alexander N; Fortier, Daniel; Froese, Duane; Fuchs, Matthias; Grosse, Guido; Günther, Frank; Harden, Jennifer W; Hugelius, Gustaf; Kanevskiy, Mikhail Z; Kholodov, Alexander L; Kunitsky, Victor V; Kraev, Gleb; Lapointe-Elmrabti, Lyna; Lozhkin, Anatoly V; Rivkina, Elizaveta; Robinson, Joel; Schirrmeister, Lutz; Shmelev, Denis; Shur, Yuri; Siegert, Christine; Spektor, Valentin; Ulrich, Mathias; Vartanyan, Sergey L; Veremeeva, Alexandra; Walter Anthony, Katey M; Zimov, Sergey A (2016): Database of Ice-Rich Yedoma Permafrost (IRYP). PANGAEA, https://doi.org/10.1594/PANGAEA.861733

Dataset extent

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