| Title: |
East Greenland Ice Sheet retreat history from Scoresby Sund and Storstrømmen Glacier during the last deglaciation |
| Authors: |
Anderson, Jacob T. H.; Young, Nicolás E.; Balter-Kennedy, Allie; Prince, Karlee K.; Walcott-George, Caleb K.; Graham, Brandon L.; Charton, Joanna; Briner, Jason P.; Schaefer, Joerg M. |
| Source: |
eISSN: 1814-9332 |
| Publication Year: |
2025 |
| Collection: |
Copernicus Publications: E-Journals |
| Description: |
The lack of geological constraints on past ice-sheet change in marine-based sectors of the Greenland Ice Sheet (GrIS) following the Last Glacial Maximum limits our ability to assess (1) the drivers of ice-sheet change, and (2) the performance of ice-sheet models that are benchmarked against the paleo-record of GrIS change. Here, we provide new in situ 10 Be surface exposure chronologies of ice-sheet margin retreat from the outer Scoresby Sund and Storstrømmen Glacier regions in eastern and northeastern Greenland, respectively. Ice retreated from Rathbone Island, east of Scoresby Sund, by ∼ 14.1 ka, recording some of the earliest documentations of terrestrial deglaciation in Greenland. The mouth of Scoresby Sund deglaciated by ∼ 13.2 ka, and retreated at an average rate of ∼ 43 m yr −1 between 13.2 and 9.7 ka. Storstrømmen Glacier retreated from the outer coast to within ∼ 3 km of the modern ice margin between ∼ 12.7 and 8.6 ka at an average rate of ∼ 28 m yr −1 . Retreat then slowed or reached a stillstand as ice retreated ∼ 3 km between ∼ 8.6 ka to the modern ice margin at ∼ 8.0 ka. These retreat rates are consistent with late glacial and Holocene estimates for marine-terminating outlet glaciers across East Greenland, and comparable to modern retreat rates observed at the largest ice streams in northeastern, and northwestern Greenland. |
| Document Type: |
text |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
https://cp.copernicus.org/articles/21/2263/2025/ |
| DOI: |
10.5194/cp-21-2263-2025 |
| Availability: |
https://doi.org/10.5194/cp-21-2263-2025; https://cp.copernicus.org/articles/21/2263/2025/ |
| Accession Number: |
edsbas.E2C0FFDE |
| Database: |
BASE |