Lake Basal Ages and Origins from scientific literature, Circum-Arctic

Brosius, Laura Susan; Treat, Claire C; Walter Anthony, Katey M; Lenz, Josefine; Jones, Miriam C; Grosse, Guido

This dataset is a compilation of 1,207 lake basal ages used to identify spatial and temporal patterns of lake formation across the high northern latitudes. Data was gathered from scientific literature descriptions of lake cores, peat cores underlain by lake sediments, and exposures within the domain of glaciation and permafrost extent during the Last Glacial Maximum. We distinguished eight classes of lake origin. Where not indicated by the author, we sought to determine lake origin from lithology, geological history and site descriptions within the text. Though most records (95%) were radiocarbon dated, we included robust dates obtained by a variety of methods including varve counting, photoluminescence, Pb/Cs, Th/U, wiggle matching and tephrochronology. We reported oldest sample ages in the majority of cases, electing not to utilize basal ages derived from age-depth models extrapolated beyond dated levels due to both their high level of uncertainty and differences between methodologies used to construct each model. We excluded dates from shallow lake cores that clearly did not reach basal lake sediments, or that were collected for the sole purpose of methods development or recent human impact studies. Records that did not include dates from lower-most cored sediments, that suffered from uncorrected reservoir effects (noted by original author) or that contained copious age reversals were also excluded. Some records provided distinct stratigraphic evidence of lake formation that allowed for exact determination of lake basal age, while other lithologies were more ambiguous. To address this uncertainty, we categorized each lake age as "minimum" or "basal" based on interpretation of contextual, geographical and lithological information.

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Grosse, Guido

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Daten und Ressourcen

Zusätzliche Informationen

Feld Wert
Identifikator DOI:10.1594/PANGAEA.894737
Projekt(e)
Institut Water and Environmental Research Center, University of Alaska Fairbanks
Quelle https://doi.org/10.1594/PANGAEA.894737
Publikationsdatum 2018-09-24
Version 1.0
Produkt synthesis of 1207 northern latitude lake initiation ages and origins
Sensor(en)
Dateien
  1. Lake Basal Age Dataset - XLSX file
  2. Lake Basal Age Dataset - CSV file
Variablen [Einheiten]
  1. Author
  2. Year
  3. Study Site
  4. Location
  5. Lake Origin
  6. Origin Class
  7. Sample ID
  8. Sample Depth (cm)
  9. Material Dated
  10. Age (14C yr BP)
  11. Error
  12. Cal Age (yr BP)
  13. Error
  14. Age Type
  15. Age Method
Region Circum-Arctic
Räumlicher Bezug EPSG:4326 WGS 84
Räumliche Auflösung
Räumliche Abdeckung Latitude 31.10 to 83.00, Longitude -179.750 to 178.918
Zeitliche Abdeckung
Zeitliche Auflösung
Format XLSX, CSV
Is Supplement To
Zusammenhang mit
Ist Zusatz zu Brosius, Laura Susan; Walter Anthony, Katey M; Treat, Claire C; Lenz, Josefine; Jones, Miriam C; Grosse, Guido (2021): Spatiotemporal patterns of northern lake formation since the Last Glacial Maximum. Quaternary Science Reviews, 253, 106773, https://doi.org/10.1016/j.quascirev.2020.106773

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