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DOI | 10.1029/2021GL093919 |
Catastrophic drainage from the northwestern outlet of glacial Lake Agassiz during the Younger Dryas | |
S. L. Norris; D. Garcia-Castellanos; J. D. Jansen; P. A. Carling; M. Margold; R. J. Woywitka; D. G. Froese | |
2021-07-16 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | Catastrophic meltwater drainage from glacial Lake Agassiz has been hypothesised as a trigger for large-scale ocean circulation change initiating the Younger Dryas cold reversal. Here we quantify the flood discharge that formed the northwestern outlet of Lake Agassiz using a one-dimensional step-backwater model and a zero-dimension gradual-incision model. Applying these two independent models, we estimate a peak discharge range of 1.8-2.5 × 106 m3 s-1 and a flood volume of ∼21,000 km3. Such a discharge can only be derived from Lake Agassiz rather than one of the two smaller regional glacial lakes: Churchill or Meadow. When coupled with existing ice margin chronologies, these results demonstrate that the northwestern outlet of Lake Agassiz provides a viable link for catastrophic meltwater to drain to the Arctic Ocean over a 5-10 month period during the Younger Dryas, though it is unclear whether this was near its beginning. |
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/333928 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | S. L. Norris,D. Garcia-Castellanos,J. D. Jansen,et al. Catastrophic drainage from the northwestern outlet of glacial Lake Agassiz during the Younger Dryas[J]. Geophysical Research Letters,2021. |
APA | S. L. Norris.,D. Garcia-Castellanos.,J. D. Jansen.,P. A. Carling.,M. Margold.,...&D. G. Froese.(2021).Catastrophic drainage from the northwestern outlet of glacial Lake Agassiz during the Younger Dryas.Geophysical Research Letters. |
MLA | S. L. Norris,et al."Catastrophic drainage from the northwestern outlet of glacial Lake Agassiz during the Younger Dryas".Geophysical Research Letters (2021). |
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