Evidence map›Paper›PMID 33723012›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

A multimillion-year-old record of Greenland vegetation and glacial history preserved in sediment beneath 1.4 km of ice at Camp Century.

Andrew J Christ, Paul R Bierman, Joerg M Schaefer, Dorthe Dahl-Jensen, Jørgen P Steffensen, Lee B Corbett, Dorothy M Peteet, Elizabeth K Thomas, Eric J Steig, Tammy M Rittenour and 8 more

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Plant, insect, and fungi fossils under the center of Greenland's ice sheet are evidence of ice-free times.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

18 authors.

Andrew J ChristDepartment of Geology, University of Vermont, Burlington, VT 05405; andrew.christ@uvm.edu.ORCID 0000-0003-0989-6491
Paul R BiermanDepartment of Geology, University of Vermont, Burlington, VT 05405.ORCID 0000-0001-9627-4601
Joerg M SchaeferLamont Doherty Earth Observatory, Columbia University, Palisades, NY 10964.ORCID 0000-0002-6358-7115
Dorthe Dahl-JensenCentre for Ice and Climate, PICE, Niels Bohr Institute, University of Copenhagen, 2200 Copenhagen, Denmark.ORCID 0000-0002-1474-1948
Jørgen P SteffensenCentre for Ice and Climate, PICE, Niels Bohr Institute, University of Copenhagen, 2200 Copenhagen, Denmark.ORCID 0000-0002-5516-1093
Lee B CorbettDepartment of Geology, University of Vermont, Burlington, VT 05405.ORCID 0000-0001-6224-8034
Dorothy M PeteetLamont Doherty Earth Observatory, Columbia University, Palisades, NY 10964.ORCID 0000-0003-3029-7506
Elizabeth K ThomasDepartment of Geology, University at Buffalo, Buffalo, NY 14260.ORCID 0000-0002-6489-7123
Eric J SteigDepartment of Earth and Space Sciences, University of Washington, Seattle, WA 98105.ORCID 0000-0002-8191-5549
Tammy M RittenourDepartment of Geosciences, Utah State University, Logan, UT 84322.ORCID 0000-0003-1925-0395
Jean-Louis TisonLaboratoire de Glaciologie, DGES-IGEOS, Université Libre de Bruxelles, Brussels 1050, Bruxelles, Belgium.ORCID 0000-0002-9758-3454
Pierre-Henri BlardLaboratoire de Glaciologie, DGES-IGEOS, Université Libre de Bruxelles, Brussels 1050, Bruxelles, Belgium.ORCID 0000-0002-8455-8014
Nicolas PerdrialDepartment of Geology, University of Vermont, Burlington, VT 05405.ORCID 0000-0002-0308-3708
David P DethierDepartment of Geosciences, Williams College, Williamstown, MA 01267.ORCID 0000-0001-7501-1810
Andrea LiniDepartment of Geology, University of Vermont, Burlington, VT 05405.ORCID 0000-0002-2920-570X
Alan J HidyCenter for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA 94550.ORCID 0000-0003-2916-1425
Marc W CaffeeDepartment of Physics and Astronomy, Purdue University, West Lafayette, IN 47907.ORCID 0000-0002-6846-8967
John SouthonKeck Carbon Cycle Accelerator Mass Spectrometer Laboratory, Department of Earth System Science, University of California, Irvine, CA 92697-3100.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Understanding the history of the Greenland Ice Sheet (GrIS) is critical for determining its sensitivity to warming and contribution to sea level; however, that history is poorly known before the last interglacial. Most knowledge comes from interpretation of marine sediment, an indirect record of past ice-sheet extent and behavior. Subglacial sediment and rock, retrieved at the base of ice cores, provide terrestrial evidence for GrIS behavior during the Pleistocene. Here, we use multiple methods to determine GrIS history from subglacial sediment at the base of the Camp Century ice core collected in 1966. This material contains a stratigraphic record of glaciation and vegetation in northwestern Greenland spanning the Pleistocene. Enriched stable isotopes of pore-ice suggest precipitation at lower elevations implying ice-sheet absence. Plant macrofossils and biomarkers in the sediment indicate that paleo-ecosystems from previous interglacial periods are preserved beneath the GrIS. Cosmogenic

Indexed as

Plant DispersalAluminumBerylliumFossilsFreezingGeologic SedimentsGreenlandIce CoverRadioisotopesAluminumAluminum-26BerylliumBeryllium-10RadioisotopesArcticclimateice coreice sheetPleistocene

Identifiers

PMID33723012
PMCPMC8020747

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.