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| DOI | 10.1016/j.quascirev.2024.108553 |
| Holocene southwest Greenland ice sheet behavior constrained by sea-level modeling | |
| Antwerpen, Raf; Austermann, Jacqueline; Young, Nicolas; Porter, David; Lewright, Lauren; Latychev, Konstantin | |
| 发表日期 | 2024 |
| ISSN | 0277-3791 |
| EISSN | 1873-457X |
| 起始页码 | 328 |
| 卷号 | 328 |
| 英文摘要 | The melting of the Greenland ice sheet (GrIS) is a major contributor to past and future global sea -level rise. Understanding the response of the GrIS to times in the past when temperatures were as warm or warmer than today offers insights into its current and future response to climate change. In the southwest sector, the GrIS retreated inland beyond its current margin during the (at least regionally) warmer -than -present mid -Holocene, before it readvanced to the historical maximum position during the Little Ice Age. This was then followed by a slight retreat to its current position. To investigate the timing and magnitude of southwest GrIS retreat and readvance in response to Holocene warmth, we model the response of the solid Earth and local relative sea level (RSL) to past ice sheet change. We test a suite of eleven ice sheet scenarios that are based on ICE-6G_C but are modified in the timing and magnitude of ice retreat and readvance and pair them with four different viscoelastic Earth structures. We compare model predictions to observations of paleo sea level, present-day sea -level change, and present-day vertical land motion (VLM) around Nuuk, Greenland. We find that the modeled timing and magnitude of the Holocene retreat and readvance have a significant impact on modern sea -level change and VLM in Nuuk. Models that assume a readvance approaching the southwest GrIS' historical maximum between 2 and 1 ka are most consistent with observations. The RSL response, however, is less sensitive to the timing of the minimum GrIS extent. Nonetheless, better data -model fits are generally obtained when the minimum ice sheet extent is reached between 5 and 3 ka, within the tested range of 6-3 ka. Comparing this timing to local and regional records of temperature and ice -sheet change suggest that the evolution of the southwestern GrIS presented here was in -phase with the likely evolution of southwestern GrIS mass balance through the Holocene. Our results have implications for future ice sheet modeling studies targeting southwestern Greenland by providing additional constraints and strengthening existing ones. Moreover, this work provides a deeper understanding of the interactions between the climate and the cryosphere and thus of future ice sheet change. |
| 英文关键词 | Greenland ice sheet; Sea level change; Glaciation; Glacial isostatic adjustment; Modeling; Holocene; Present; Tide gauge; GPS |
| 语种 | 英语 |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001188288800001 |
| 来源期刊 | QUATERNARY SCIENCE REVIEWS
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/306073 |
| 作者单位 | Columbia University |
| 推荐引用方式 GB/T 7714 | Antwerpen, Raf,Austermann, Jacqueline,Young, Nicolas,et al. Holocene southwest Greenland ice sheet behavior constrained by sea-level modeling[J],2024,328. |
| APA | Antwerpen, Raf,Austermann, Jacqueline,Young, Nicolas,Porter, David,Lewright, Lauren,&Latychev, Konstantin.(2024).Holocene southwest Greenland ice sheet behavior constrained by sea-level modeling.QUATERNARY SCIENCE REVIEWS,328. |
| MLA | Antwerpen, Raf,et al."Holocene southwest Greenland ice sheet behavior constrained by sea-level modeling".QUATERNARY SCIENCE REVIEWS 328(2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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