格陵兰冰盖表面冰下洪水的爆发

IF 16.1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Jade S. Bowling, Malcolm McMillan, Amber A. Leeson, Stephen J. Livingstone, Andrew J. Sole, Felix S. L. Ng, Nanna B. Karlsson, Peter Nienow, Karla Boxall, Brice Noël, Michiel R. van den Broeke, Thomas Slater, Jennifer Maddalena, Louise Sandberg Sørensen, Sebastian B. Simonsen, Jérémie Mouginot, Romain Millan, Laura Melling, Liam Taylor, Angelika Humbert
{"title":"格陵兰冰盖表面冰下洪水的爆发","authors":"Jade S. Bowling, Malcolm McMillan, Amber A. Leeson, Stephen J. Livingstone, Andrew J. Sole, Felix S. L. Ng, Nanna B. Karlsson, Peter Nienow, Karla Boxall, Brice Noël, Michiel R. van den Broeke, Thomas Slater, Jennifer Maddalena, Louise Sandberg Sørensen, Sebastian B. Simonsen, Jérémie Mouginot, Romain Millan, Laura Melling, Liam Taylor, Angelika Humbert","doi":"10.1038/s41561-025-01746-9","DOIUrl":null,"url":null,"abstract":"<p>As Earth’s climate warms, surface melting of the Greenland Ice Sheet has intensified, increasing rates of sea-level rise. Observations and theory indicate that meltwater generated at the ice sheet surface can drain to its bed, where it flows relatively unhindered to the ocean. This understanding of water movement within and beneath ice sheets underpins the theoretical models that are used to make projections of ice sheet change. Here we present evidence of a destructive mode of meltwater drainage in Greenland. Using multiple satellite sources, we show that a 90-million-cubic-metre subglacial flood forced its way upwards from the bed, fracturing the ice sheet, and bursting through the surface. This phenomenon was triggered by the rapid drainage of a subglacial lake and occurred in a region where the ice bed was predicted to be frozen. The resulting flood caused a rapid deceleration of the downstream marine-terminating glacier. Our observations reveal a complex, bi-directional coupling between the ice sheet’s surface and basal hydrological systems and demonstrate that extreme hydrological forcing may occur in regions of predicted cold-based ice. Such processes can impact the ice sheet’s dynamics and structural integrity but are not currently considered in ice sheet models.</p>","PeriodicalId":19053,"journal":{"name":"Nature Geoscience","volume":"111 1","pages":""},"PeriodicalIF":16.1000,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Outburst of a subglacial flood from the surface of the Greenland Ice Sheet\",\"authors\":\"Jade S. Bowling, Malcolm McMillan, Amber A. Leeson, Stephen J. Livingstone, Andrew J. Sole, Felix S. L. Ng, Nanna B. Karlsson, Peter Nienow, Karla Boxall, Brice Noël, Michiel R. van den Broeke, Thomas Slater, Jennifer Maddalena, Louise Sandberg Sørensen, Sebastian B. Simonsen, Jérémie Mouginot, Romain Millan, Laura Melling, Liam Taylor, Angelika Humbert\",\"doi\":\"10.1038/s41561-025-01746-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>As Earth’s climate warms, surface melting of the Greenland Ice Sheet has intensified, increasing rates of sea-level rise. Observations and theory indicate that meltwater generated at the ice sheet surface can drain to its bed, where it flows relatively unhindered to the ocean. This understanding of water movement within and beneath ice sheets underpins the theoretical models that are used to make projections of ice sheet change. Here we present evidence of a destructive mode of meltwater drainage in Greenland. Using multiple satellite sources, we show that a 90-million-cubic-metre subglacial flood forced its way upwards from the bed, fracturing the ice sheet, and bursting through the surface. This phenomenon was triggered by the rapid drainage of a subglacial lake and occurred in a region where the ice bed was predicted to be frozen. The resulting flood caused a rapid deceleration of the downstream marine-terminating glacier. Our observations reveal a complex, bi-directional coupling between the ice sheet’s surface and basal hydrological systems and demonstrate that extreme hydrological forcing may occur in regions of predicted cold-based ice. Such processes can impact the ice sheet’s dynamics and structural integrity but are not currently considered in ice sheet models.</p>\",\"PeriodicalId\":19053,\"journal\":{\"name\":\"Nature Geoscience\",\"volume\":\"111 1\",\"pages\":\"\"},\"PeriodicalIF\":16.1000,\"publicationDate\":\"2025-07-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nature Geoscience\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.1038/s41561-025-01746-9\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature Geoscience","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1038/s41561-025-01746-9","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

随着地球气候变暖,格陵兰冰盖表面融化加剧,海平面上升速度加快。观测和理论表明,冰盖表面产生的融水可以排到冰盖床上,在那里相对畅通无阻地流入海洋。这种对冰盖内部和冰盖下水运动的理解,是用来预测冰盖变化的理论模型的基础。在这里,我们提出了格陵兰岛融水排水的破坏性模式的证据。通过多个卫星来源,我们发现,一股9000万立方米的冰下洪水从河床向上冲,破坏了冰盖,冲破了地表。这一现象是由一个冰下湖泊的快速排水引发的,并发生在一个预计冰床会冻结的地区。由此产生的洪水导致下游的海洋冰川迅速减速。我们的观测结果揭示了冰盖表面和基础水文系统之间复杂的双向耦合,并表明极端水文强迫可能发生在预测的冷基冰区域。这些过程可以影响冰盖的动力学和结构完整性,但目前在冰盖模型中没有考虑到。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Outburst of a subglacial flood from the surface of the Greenland Ice Sheet

Outburst of a subglacial flood from the surface of the Greenland Ice Sheet

As Earth’s climate warms, surface melting of the Greenland Ice Sheet has intensified, increasing rates of sea-level rise. Observations and theory indicate that meltwater generated at the ice sheet surface can drain to its bed, where it flows relatively unhindered to the ocean. This understanding of water movement within and beneath ice sheets underpins the theoretical models that are used to make projections of ice sheet change. Here we present evidence of a destructive mode of meltwater drainage in Greenland. Using multiple satellite sources, we show that a 90-million-cubic-metre subglacial flood forced its way upwards from the bed, fracturing the ice sheet, and bursting through the surface. This phenomenon was triggered by the rapid drainage of a subglacial lake and occurred in a region where the ice bed was predicted to be frozen. The resulting flood caused a rapid deceleration of the downstream marine-terminating glacier. Our observations reveal a complex, bi-directional coupling between the ice sheet’s surface and basal hydrological systems and demonstrate that extreme hydrological forcing may occur in regions of predicted cold-based ice. Such processes can impact the ice sheet’s dynamics and structural integrity but are not currently considered in ice sheet models.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Nature Geoscience
Nature Geoscience 地学-地球科学综合
CiteScore
26.70
自引率
1.60%
发文量
187
审稿时长
3.3 months
期刊介绍: Nature Geoscience is a monthly interdisciplinary journal that gathers top-tier research spanning Earth Sciences and related fields. The journal covers all geoscience disciplines, including fieldwork, modeling, and theoretical studies. Topics include atmospheric science, biogeochemistry, climate science, geobiology, geochemistry, geoinformatics, remote sensing, geology, geomagnetism, paleomagnetism, geomorphology, geophysics, glaciology, hydrology, limnology, mineralogy, oceanography, paleontology, paleoclimatology, paleoceanography, petrology, planetary science, seismology, space physics, tectonics, and volcanology. Nature Geoscience upholds its commitment to publishing significant, high-quality Earth Sciences research through fair, rapid, and rigorous peer review, overseen by a team of full-time professional editors.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信