Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL094762 |
Isolated cavities dominate Greenland Ice Sheet dynamic response to lake drainage | |
J. Z. Mejí; a; J. D. Gulley; C. Trunz; M. D. Covington; T. C. Bartholomaus; S. Xie; T. Dixon | |
2021-09-22 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Seasonal variability in the Greenland Ice Sheet’s (GrIS) sliding speed is regulated by the response of the subglacial drainage system to meltwater inputs. However, the importance of channelization relative to the dewatering of isolated cavities in controlling seasonal ice deceleration remains unsolved. Using ice motion, moulin hydraulic head, and glaciohydraulic tremor measurements, we show the passing of a subglacial floodwave triggered by upglacier supraglacial lake drainages slowed sliding to wintertime background speeds without increasing the hydraulic capacity of the moulin-connected drainage system. We interpret these results to reflect an increase in basal traction caused by the dewatering of isolated cavities. These results suggest the dewatering of isolated parts of the subglacial drainage system play a key role in driving seasonal slowdowns on the GrIS. |
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/338805 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | J. Z. Mejí,a,J. D. Gulley,et al. Isolated cavities dominate Greenland Ice Sheet dynamic response to lake drainage[J]. Geophysical Research Letters,2021. |
APA | J. Z. Mejí.,a.,J. D. Gulley.,C. Trunz.,M. D. Covington.,...&T. Dixon.(2021).Isolated cavities dominate Greenland Ice Sheet dynamic response to lake drainage.Geophysical Research Letters. |
MLA | J. Z. Mejí,et al."Isolated cavities dominate Greenland Ice Sheet dynamic response to lake drainage".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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