التفاصيل البيبلوغرافية
| العنوان: |
Tensile strength of glacial ice deduced from observations of the 2015 eastern Skaftá cauldron collapse, Vatnajökull ice cap, Iceland |
| المؤلفون: |
Ultee, Lizz, Minchew, Brent M |
| المساهمون: |
Massachusetts Institute of Technology. Department of Earth and Planetary Sciences |
| المصدر: |
Cambridge University Press |
| بيانات النشر: |
Cambridge University Press (CUP) |
| سنة النشر: |
2021 |
| المجموعة: |
DSpace@MIT (Massachusetts Institute of Technology) |
| الوصف: |
AbstractThe representation of iceberg calving in numerical models is a key source of uncertainty in century-scale sea-level rise projections. Parameters central to model representations of calving, including the tensile strength of glacier ice, remain poorly constrained. Grain-size and sample-size dependence make it difficult to reconcile laboratory and in situ estimates of ice tensile strength. Further, assumptions of various numerical models obscure comparison of the ‘strength’ parameter with a physically observable value. Here, we address the problem of fracture during calving using an analogous natural laboratory: a viscoelastic analysis of observed surface deformation and associated stresses in the 2015 collapse of eastern Skaftá cauldron, Vatnajökull ice cap, Iceland. We find that the ice within the cauldron could have experienced instantaneous elastic stress on the order of several MPa. We observe surface crevasses at the cauldron edges and center, but find that large areas of ice remain intact despite high stress. Our findings suggest a tensile strength of glacier ice on the order of 1 MPa, consistent with laboratory estimates but exceeding previous glacier-specific estimates. ; Seventh Framework Programme (European Commission) (Grant agreement 308377) |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/octet-stream |
| اللغة: |
English |
| تدمد: |
0022-1430 |
| Relation: |
Journal of Glaciology; https://hdl.handle.net/1721.1/133821.2 |
| الاتاحة: |
https://hdl.handle.net/1721.1/133821.2 |
| Rights: |
Creative Commons Attribution-Noncommercial-Share Alike ; http://creativecommons.org/licenses/by-nc-sa/4.0/ |
| رقم الانضمام: |
edsbas.9C6BD28A |
| قاعدة البيانات: |
BASE |