Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL085176 |
The Northwestern Greenland Ice Sheet During The Early Pleistocene Was Similar To Today | |
Christ, Andrew J.1,2; Bierman, Paul R.1,2; Knutz, Paul C.3; Corbett, Lee B.1; Fosdick, Julie C.4; Thomas, Elizabeth K.5; Cowling, Owen C.5; Hidy, Alan J.6; Caffee, M. W.7,8 | |
2020-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Denmark |
英文摘要 | The multi-million year history of the Greenland Ice Sheet remains poorly known. Ice-proximal glacial marine diamict provides a direct but discontinuous record of ice sheet behavior; it is underutilized as a climate archive. Here, we present a novel multiproxy analysis of an Early Pleistocene marine diamict from northwestern Greenland. Low cosmogenic nuclide concentrations indicate minimal near-surface exposure, similar to modern terrestrial sediment. Detrital apatite (U-Th-Sm)/He (AHe) ages all predate glaciation by >150 million years, suggesting the northwestern Greenland Ice Sheet had, by 1.9 Ma, not yet incised fjords of sufficient depth to excavate grains with young AHe ages. The diamict contains terrestrial plant leaf wax, likely from land surfaces surrounding the ice sheet. These data indicate that a persistent, dynamic ice sheet existed in northwestern Greenland by 1.9 Ma and that diamict is a useful archive of ice sheet history and process. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000513983400014 |
WOS关键词 | HELIUM DIFFUSION ; RADIATION-DAMAGE ; METEORIC BE-10 ; SURFACE ; GLACIATION ; EVOLUTION ; LANDSCAPE ; DELTA-H-2 ; PROFILES ; COLLAPSE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279514 |
专题 | 气候变化 |
作者单位 | 1.Univ Vermont, Dept Geol, Burlington, VT 05405 USA; 2.Univ Vermont, Gund Inst Environm, Burlington, VT 05405 USA; 3.Geol Survey Denmark & Greenland, Geophys Dept, Copenhagen, Denmark; 4.Univ Connecticut, Dept Geosci, Storrs, CT USA; 5.SUNY Buffalo, Dept Geol, Buffalo, NY USA; 6.Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA; 7.Purdue Univ, Dept Phys & Astron, W Lafayette, TN USA; 8.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN USA |
推荐引用方式 GB/T 7714 | Christ, Andrew J.,Bierman, Paul R.,Knutz, Paul C.,et al. The Northwestern Greenland Ice Sheet During The Early Pleistocene Was Similar To Today[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(1). |
APA | Christ, Andrew J..,Bierman, Paul R..,Knutz, Paul C..,Corbett, Lee B..,Fosdick, Julie C..,...&Caffee, M. W..(2020).The Northwestern Greenland Ice Sheet During The Early Pleistocene Was Similar To Today.GEOPHYSICAL RESEARCH LETTERS,47(1). |
MLA | Christ, Andrew J.,et al."The Northwestern Greenland Ice Sheet During The Early Pleistocene Was Similar To Today".GEOPHYSICAL RESEARCH LETTERS 47.1(2020). |
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