Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL094263 |
Laurentide ice saddle mergers drive rapid sea level drops during glaciations | |
Weiwen Ji; Alexander Robel; Eli Tziperman; Jun Yang | |
2021-07-15 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Recent glacial periods have included several periods of rapid sea-level drop that are still not well understood. Here we show that rapid sea level drops can occur due to merger of two separate ice sheets without correspondingly rapid climate forcing. Using the Parallel Ice Sheet Model (PISM), we simulate glaciation of the Laurentide Ice Sheet (LIS) by gradually decreasing equilibrium-line altitude (ELA). Merger of the extended Keewatin sector of the Laurentide Ice Sheet with Labrador sector of the Laurentide Ice Sheet south of Hudson Bay causes a positive feedback between increasing surface elevation and increasing surface mass balance in the merger region, leading to fast ice sheet growth. The simulated saddle merger of LIS lowers sea level by 20 m in less than 20 kyr with periods of sea level fall exceeding 2 m/kyr, similar to those observed in paleo-sea level records. |
领域 | 气候变化 |
URL | 查看原文 |
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/334052 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Weiwen Ji,Alexander Robel,Eli Tziperman,et al. Laurentide ice saddle mergers drive rapid sea level drops during glaciations[J]. Geophysical Research Letters,2021. |
APA | Weiwen Ji,Alexander Robel,Eli Tziperman,&Jun Yang.(2021).Laurentide ice saddle mergers drive rapid sea level drops during glaciations.Geophysical Research Letters. |
MLA | Weiwen Ji,et al."Laurentide ice saddle mergers drive rapid sea level drops during glaciations".Geophysical Research Letters (2021). |
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