The Greenland Ice Sheet Project 2 depth-age scale: Methods and results

D. A. Meese, A. J. Gow, R. B. Alley, G. A. Zielinski, P. M. Grootes, M. Ram, K. C. Taylor, P. A. Mayewski, J. F. Bolzan

Research output: Contribution to journalArticlepeer-review

407 Scopus citations


The Greenland Ice Sheet Project 2 (GISP2) depth-age scale is presented based on a multiparameter continuous count approach, to a depth of 2800 m, using a systematic combination of parameters that have never been used to this extent before. The ice at 2800 m is dated at 110,000 years B.P. with an estimated error ranging from 1 to 10% in the top 2500 m of the core and averaging 20% between 2500 and 2800 m. Parameters used to date the core include visual stratigraphy, oxygen isotopic ratios of the ice, electrical conductivity measurements, laser-light scattering from dust, volcanic signals, and major ion chemistry. GISP2 ages for major climatic events agree with independent ages based on varve chronologies, calibrated radiocarbon dates, and other techniques within the combined uncertainties. Good agreement also is obtained with Greenland Ice Core Project ice core dates and with the SPECMAP marine timescale after correlation through the δ18O of O2. Although the core is deformed below 2800 m and the continuity of the record is unclear, we attempted to date this section of the core on the basis of the laser-light scattering of dust in the ice.

Original languageEnglish (US)
Pages (from-to)26411-26423
Number of pages13
JournalJournal of Geophysical Research: Oceans
Issue numberC12
StatePublished - Nov 30 1997

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geophysics
  • Oceanography
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)


Dive into the research topics of 'The Greenland Ice Sheet Project 2 depth-age scale: Methods and results'. Together they form a unique fingerprint.

Cite this