Seasonal control of Petermann Gletscher ice-shelf melt by the ocean’s response to sea-ice cover in Nares Strait
| Author(s) | Shroyer, E. L. | |
| Author(s) | Padman, L. | |
| Author(s) | Samelson, R. M. | |
| Author(s) | Münchow, A. | |
| Author(s) | Stearns, L. A. | |
| Ordered Author | E. L. SHROYER, L. PADMAN, R. M. SAMELSON, A. MÜNCHOW, L. A. STEARNS | |
| UD Author | Münchow, A | en_US |
| Date Accessioned | 2018-08-08T15:07:39Z | |
| Date Available | 2018-08-08T15:07:39Z | |
| Copyright Date | Copyright © The Author(s) 2017. | en_US |
| Publication Date | 2017-02-02 | |
| Description | Publisher's PDF | en_US |
| Abstract | Petermann Gletscher drains ∼4% of the Greenland ice sheet (GrIS) area, with ∼80% of its mass loss occurring by basal melting of its ice shelf. We use a high-resolution coupled ocean and sea-ice model with a thermodynamic glacial ice shelf to diagnose ocean-controlled seasonality in basal melting of the Petermann ice shelf. Basal melt rates increase by ∼20% in summer due to a seasonal shift in ocean circulation within Nares Strait that is associated with the transition from landfast sea ice to mobile sea ice. Under landfast ice, cold near-surface waters are maintained on the eastern side of the strait and within Petermann Fjord, reducing basal melt and insulating the ice shelf. Under mobile sea ice, warm waters are upwelled on the eastern side of the strait and, mediated by local instabilities and eddies, enter Petermann Fjord, enhancing basal melt down to depths of 200 m. The transition between these states occurs rapidly, and seasonal changes within Nares Strait are conveyed into the fjord within the same season. These results suggest that long-term changes in the length of the landfast sea-ice season will substantially alter the structure of Petermann ice shelf and its contribution to GrIS mass loss. | en_US |
| Department | University of Delaware. College of Earth, Ocean and Environment. | en_US |
| Citation | SHROYER, E., PADMAN, L., SAMELSON, R., MÜNCHOW, A., & STEARNS, L. (2017). Seasonal control of Petermann Gletscher ice-shelf melt by the ocean's response to sea-ice cover in Nares Strait. Journal of Glaciology, 63(238), 324-330. doi:10.1017/jog.2016.140 | en_US |
| DOI | 10.1017/jog.2016.140 | en_US |
| ISSN | 0022-1430 | en_US |
| URL | http://udspace.udel.edu/handle/19716/23666 | |
| Language | en_US | en_US |
| Publisher | Cambridge University Press | en_US |
| dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
| dc.rights | This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. | en_US |
| dc.source | Journal of Glaciology | en_US |
| dc.source.uri | https://www.cambridge.org/core/journals/journal-of-glaciology | en_US |
| Title | Seasonal control of Petermann Gletscher ice-shelf melt by the ocean’s response to sea-ice cover in Nares Strait | en_US |
| Type | Article | en_US |
Files
Original bundle
1 - 1 of 1
Loading...
- Name:
- Seasonal control of Petermann Gletscher ice-shelf melt by the ocean's response to sea-ice cover in Nares_1493413277T6655.pdf
- Size:
- 552.72 KB
- Format:
- Adobe Portable Document Format
- Description:
License bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- license.txt
- Size:
- 2.22 KB
- Format:
- Item-specific license agreed upon to submission
- Description: