Abrupt Holocene climate change as an important factor for human migration in West Greenland

William J. D'Andrea, Yongsong Huang, Sherilyn C. Fritz, N. John Anderson

Research output: Contribution to journalArticlepeer-review

162 Scopus citations

Abstract

West Greenland has had multiple episodes of human colonization and cultural transitions over the past 4,500 y. However, the explanations for these large-scale human migrations are varied, including climatic factors, resistance to adaptation, economic marginalization, mercantile exploration, and hostile neighborhood interactions. Evaluating the potential role of climate change is complicated by the lack of quantitative paleoclimate reconstructions near settlement areas and by the relative stability of Holocene temperature derived from ice cores atop the Greenland ice sheet. Here we present high-resolution records of temperature over the past 5,600 y based on alkenone unsaturation in sediments of two lakes in West Greenland. We find that major temperature changes in the past 4,500 y occurred abruptly (within decades), and were coeval in timing with the archaeological records of settlement and abandonment of the Saqqaq, Dorset, and Norse cultures, which suggests that abrupt temperature changes profoundly impacted human civilization in the region. Temperature variations in West Greenland display an antiphased relationship to temperature changes in Ireland over centennial to millennial timescales, resembling the interannual to multidecadal temperature seesaw associated with the North Atlantic Oscillation.

Original languageEnglish (US)
Pages (from-to)9765-9769
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume108
Issue number24
DOIs
StatePublished - Jun 14 2011
Externally publishedYes

Keywords

  • Anthropology
  • Arctic
  • Biomarker
  • Paleoclimatology

ASJC Scopus subject areas

  • General

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