Vertical Land Motion From Present‐Day Deglaciation in the Wider Arctic

Carsten Ankjær Ludwigsen*, Shfaqat Abbas Khan, Ole Baltazar Andersen, Ben Marzeion

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Vertical land motion (VLM) from past and ongoing glacial changes can amplify or mitigate ongoing relative sea level change.We present a high-resolution VLM model for the wider Arctic, that includes both present-day ice loading (PDIL) and glacial isostatic adjustment (GIA). The study shows that the nonlinear elastic uplift from PDIL is significant (0.5–1mm yr−1) in most of the wider Arctic and exceeds GIA at 15 of 54 Arctic GNSS sites, including sites in nonglaciated areas of the North Sea region and the east coast of North America. Thereby the sea level change from PDIL (1.85mm yr−1) is significantly mitigated from VLM caused by PDIL. The combined VLM model was consistent with measured VLM at 85% of the GNSS sites (R = 0.77) and outperformed a GIA-only model (R = 0.64). Deviations from GNSS-measured VLM can be attributed to local circumstances causing VLM.
Original languageEnglish
Article numbere2020GL088144
JournalGeophysical Research Letters
Volume47
Issue number19
Number of pages11
ISSN0094-8276
DOIs
Publication statusPublished - 2020

Bibliographical note

©2020. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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