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| DOI | 10.1038/s41561-022-00961-y |
| Relative sea-level data preclude major late Holocene ice-mass change in Pine Island Bay | |
| Braddock S.; Hall B.L.; Johnson J.S.; Balco G.; Spoth M.; Whitehouse P.L.; Campbell S.; Goehring B.M.; Rood D.H.; Woodward J. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 起始页码 | 568 |
| 结束页码 | 572 |
| 卷号 | 15期号:7 |
| 英文摘要 | The rapidly retreating Thwaites and Pine Island glaciers together dominate present-day ice loss from the West Antarctic Ice Sheet and are implicated in runaway deglaciation scenarios. Knowledge of whether these glaciers were substantially smaller in the mid-Holocene and subsequently recovered to their present extents is important for assessing whether current ice recession is irreversible. Here we reconstruct relative sea-level change from radiocarbon-dated raised beaches at sites immediately seawards of these glaciers, allowing us to examine the response of the earth to loading and unloading of ice in the Amundsen Sea region. We find that relative sea level fell steadily over the past 5.5 kyr without rate changes that would characterize large-scale ice re-expansion. Moreover, current bedrock uplift rates are an order of magnitude greater than the rate of long-term relative sea-level fall, suggesting a change in regional crustal unloading and implying that the present deglaciation may be unprecedented in the past ~5.5 kyr. While we cannot preclude minor grounding-line fluctuations, our data are explained most easily by early Holocene deglaciation followed by relatively stable ice positions until recent times and imply that Thwaites and Pine Island glaciers have not been substantially smaller than present during the past 5.5 kyr. © 2022, The Author(s). |
| 语种 | 英语 |
| scopus关键词 | deglaciation; Holocene; radiocarbon dating; sea level; Amundsen Sea; Antarctic Ice Sheet; Antarctica; Pine Island Bay; Southern Ocean; West Antarctic Ice Sheet; West Antarctica |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/262179 |
| 作者单位 | School of Earth and Climate Sciences and the Climate Change Institute, University of Maine, Orono, ME, United States |
| 推荐引用方式 GB/T 7714 | Braddock S.； Hall B.L.； Johnson J.S.； Balco G.； Spoth M.； Whitehouse P.L.； Campbell S.； Goehring B.M.； Rood D.H.； Woodward J.. Relative sea-level data preclude major late Holocene ice-mass change in Pine Island Bay[J],2022,15(7). |
| APA | Braddock S.； Hall B.L.； Johnson J.S.； Balco G.； Spoth M.； Whitehouse P.L.； Campbell S.； Goehring B.M.； Rood D.H.； Woodward J..(2022).Relative sea-level data preclude major late Holocene ice-mass change in Pine Island Bay.Nature Geoscience,15(7). |
| MLA | Braddock S.； Hall B.L.； Johnson J.S.； Balco G.； Spoth M.； Whitehouse P.L.； Campbell S.； Goehring B.M.； Rood D.H.； Woodward J.."Relative sea-level data preclude major late Holocene ice-mass change in Pine Island Bay".Nature Geoscience 15.7(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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