Abrupt Holocene climate change as an important factor for human migration in West Greenland
- 31 May 2011
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences of the United States of America
- Vol. 108 (24), 9765-9769
- https://doi.org/10.1073/pnas.1101708108
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.Keywords
This publication has 31 references indexed in Scilit:
- Persistent Positive North Atlantic Oscillation Mode Dominated the Medieval Climate AnomalyScience, 2009
- Increased aridity during the early Holocene in West Greenland inferred from stable isotopes in laminated-lake sedimentsQuaternary Science Reviews, 2004
- Empirical modeling of summer lake surface temperatures in southwest GreenlandLimnology and Oceanography, 2004
- A continuous record of Holocene eolian activity in West GreenlandQuaternary Research, 2003
- Holocene century-scale temperature variability from West Greenland lake recordsGeology, 1999
- Interdisciplinary investigations of the end of the Norse Western Settlement in GreenlandThe Holocene, 1997
- Temperature, accumulation, and ice sheet elevation in central Greenland through the last deglacial transitionJournal of Geophysical Research: Oceans, 1997
- The Little Ice Age and Medieval Warm Period in the Sargasso SeaScience, 1996
- Paleoecological Studies of a Holocene Lacustrine Record from the Kangerlussuaq (Søndre Strømfjord) Region of West GreenlandQuaternary Research, 1995
- Climatic changes, Norsemen and modern manNature, 1975