The Global Fingerprint of Modern Ice-Mass Loss on 3-D Crustal Motion
Name
Geophysical Research Letters - 2021 - Coulson - The Global Fingerprint of Modern Ice‐Mass Loss on 3‐D Crustal Motion.pdf
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Author(s)
Coulson, Sophie
Lubeck, Mi
Mitrovica, Jerry
Powell, Evelyn
Davis, James
Hoggard, Mark
Date Issued
August 16, 2021
Journal
Geophysical Research Letters
Publisher
American Geophysical Union
Citation
Coulson, S., Lubeck, M., Mitrovica, J. X., Powell, E., Davis, J. L., & Hoggard, M. J. (2021). The global fingerprint of modern ice-mass loss on 3-D crustal motion. Geophysical Research Letters, 48, e2021GL095477. https://doi.org/10.1029/2021GL095477
Version
Final published version
Abstract
Crustal motion generated by rapid ice-mass loss from Earth's glaciers and ice sheets has previously been considered in Global Navigational Satellite System (GNSS) analyses and numerical models across regions of ice retreat. However, the fingerprint of ice-mass loss is not limited to glaciated areas, but is characterized by a global pattern of 3-D crustal deformation. We compute “far-field” vertical and horizontal deformation rates that occurred in response to early 21st century mass flux from the Greenland and Antarctic Ice Sheets, global glaciers and ice caps, and associated ocean loading. We demonstrate that mass changes in the Greenland Ice Sheet and high latitude glacier systems each generated average crustal motion of 0.1–0.4 mm/yr across much of the Northern Hemisphere, with significant year-to-year variability in magnitude and direction. Horizontal motions associated with ice-mass loss exceed vertical rates in many far-field areas, and both should be considered in future analysis of GNSS measurements.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
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DOI of Published Version
https://doi.org/10.1029/2021GL095477Di
