Abrupt climatic events during the last glacial-interglacial transition in Alaska

Feng Sheng Hu, David M. Nelson, Gina H. Clarke, Kathleen M. Rühland, Yongsong Huang, Darrell S. Kaufman, John P. Smol

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Evidence is mounting that abrupt climatic shifts occurred during the last glacial-interglacial transition (LGIT) in the North Atlantic and other regions. However, few high-resolution climatic records of the LGIT exist from the high latitudes of the North Pacific rim. We analyzed lake sediments from southwestern Alaska for biogenic silica, organic carbon, organic nitrogen, diatom assemblages, and compound-specific hydrogen isotopes. Results reveal climatic changes coincident with the Younger Dryas, Intra-Allerød Cold Period, and Pre-Boreal Oscillation. However, major discrepancies exist in the paleoclimate patterns of the Bølling-Allerød interstadial between our data and the GISP2 δ18O record from Greenland, and causes are uncertain. These data suggest that the North Pacific and North Atlantic experienced similar reversals during climatic warming of the LGIT but that the Bølling-Allerød cooling trend in the GISP2 δ18O record is probably not a hemispheric or global pattern.

Original languageEnglish (US)
Article numberL18708
JournalGeophysical Research Letters
Issue number18
StatePublished - Sep 28 2006

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences


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