Greenland Mass Trends From Airborne and Satellite Altimetry During 2011–2020

Shfaqat A. Khan; Jonathan L. Bamber; Eric Rignot; Veit Helm; Andy Aschwanden; David M. Holland; Michiel Broeke; Michalea King; Brice Noël; Martin Truffer; Angelika Humbert; William Colgan; Saurabh Vijay; Peter Kuipers Munneke

doi:10.1029/2021JF006505

Greenland Mass Trends From Airborne and Satellite Altimetry During 2011–2020

Shfaqat A. Khan^*, Jonathan L. Bamber, Eric Rignot, Veit Helm, Andy Aschwanden, David M. Holland, Michiel Broeke, Michalea King, Brice Noël, Martin Truffer, Angelika Humbert, William Colgan, Saurabh Vijay, Peter Kuipers Munneke

^*Corresponding author for this work

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Abstract

We use satellite and airborne altimetry to estimate annual mass changes of the Greenland Ice Sheet. We estimate ice loss corresponding to a sea-level rise of 6.9 ± 0.4 mm from April 2011 to April 2020, with a highest annual ice loss rate of 1.4 mm/yr sea-level equivalent from April 2019 to April 2020. On a regional scale, our annual mass loss timeseries reveals 10–15 m/yr dynamic thickening at the terminus of Jakobshavn Isbræ from April 2016 to April 2018, followed by a return to dynamic thinning. We observe contrasting patterns of mass loss acceleration in different basins across the ice sheet and suggest that these spatiotemporal trends could be useful for calibrating and validating prognostic ice sheet models. In addition to resolving the spatial and temporal fingerprint of Greenland's recent ice loss, these mass loss grids are key for partitioning contemporary elastic vertical land motion from longer-term glacial isostatic adjustment (GIA) trends at GPS stations around the ice sheet. Our ice-loss product results in a significantly different GIA interpretation from a previous ice-loss product.

Original language	English
Article number	e2021JF006505
Journal	Journal of Geophysical Research: Earth Surface
Volume	127
Issue number	4
Number of pages	20
ISSN	0148-0227
DOIs	https://doi.org/10.1029/2021JF006505
Publication status	Published - 2022

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Khan, S. A., Bamber, J. L., Rignot, E., Helm, V., Aschwanden, A., Holland, D. M., Broeke, M., King, M., Noël, B., Truffer, M., Humbert, A., Colgan, W., Vijay, S., & Kuipers Munneke, P. (2022). Greenland Mass Trends From Airborne and Satellite Altimetry During 2011–2020. Journal of Geophysical Research: Earth Surface, 127(4), Article e2021JF006505. https://doi.org/10.1029/2021JF006505

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title = "Greenland Mass Trends From Airborne and Satellite Altimetry During 2011–2020",

abstract = "We use satellite and airborne altimetry to estimate annual mass changes of the Greenland Ice Sheet. We estimate ice loss corresponding to a sea-level rise of 6.9 ± 0.4 mm from April 2011 to April 2020, with a highest annual ice loss rate of 1.4 mm/yr sea-level equivalent from April 2019 to April 2020. On a regional scale, our annual mass loss timeseries reveals 10–15 m/yr dynamic thickening at the terminus of Jakobshavn Isbr{\ae} from April 2016 to April 2018, followed by a return to dynamic thinning. We observe contrasting patterns of mass loss acceleration in different basins across the ice sheet and suggest that these spatiotemporal trends could be useful for calibrating and validating prognostic ice sheet models. In addition to resolving the spatial and temporal fingerprint of Greenland's recent ice loss, these mass loss grids are key for partitioning contemporary elastic vertical land motion from longer-term glacial isostatic adjustment (GIA) trends at GPS stations around the ice sheet. Our ice-loss product results in a significantly different GIA interpretation from a previous ice-loss product.",

author = "Khan, {Shfaqat A.} and Bamber, {Jonathan L.} and Eric Rignot and Veit Helm and Andy Aschwanden and Holland, {David M.} and Michiel Broeke and Michalea King and Brice No{\"e}l and Martin Truffer and Angelika Humbert and William Colgan and Saurabh Vijay and {Kuipers Munneke}, Peter",

year = "2022",

doi = "10.1029/2021JF006505",

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T1 - Greenland Mass Trends From Airborne and Satellite Altimetry During 2011–2020

AU - Khan, Shfaqat A.

AU - Bamber, Jonathan L.

AU - Rignot, Eric

AU - Helm, Veit

AU - Aschwanden, Andy

AU - Holland, David M.

AU - Broeke, Michiel

AU - King, Michalea

AU - Noël, Brice

AU - Truffer, Martin

AU - Humbert, Angelika

AU - Colgan, William

AU - Vijay, Saurabh

AU - Kuipers Munneke, Peter

PY - 2022

Y1 - 2022

N2 - We use satellite and airborne altimetry to estimate annual mass changes of the Greenland Ice Sheet. We estimate ice loss corresponding to a sea-level rise of 6.9 ± 0.4 mm from April 2011 to April 2020, with a highest annual ice loss rate of 1.4 mm/yr sea-level equivalent from April 2019 to April 2020. On a regional scale, our annual mass loss timeseries reveals 10–15 m/yr dynamic thickening at the terminus of Jakobshavn Isbræ from April 2016 to April 2018, followed by a return to dynamic thinning. We observe contrasting patterns of mass loss acceleration in different basins across the ice sheet and suggest that these spatiotemporal trends could be useful for calibrating and validating prognostic ice sheet models. In addition to resolving the spatial and temporal fingerprint of Greenland's recent ice loss, these mass loss grids are key for partitioning contemporary elastic vertical land motion from longer-term glacial isostatic adjustment (GIA) trends at GPS stations around the ice sheet. Our ice-loss product results in a significantly different GIA interpretation from a previous ice-loss product.

AB - We use satellite and airborne altimetry to estimate annual mass changes of the Greenland Ice Sheet. We estimate ice loss corresponding to a sea-level rise of 6.9 ± 0.4 mm from April 2011 to April 2020, with a highest annual ice loss rate of 1.4 mm/yr sea-level equivalent from April 2019 to April 2020. On a regional scale, our annual mass loss timeseries reveals 10–15 m/yr dynamic thickening at the terminus of Jakobshavn Isbræ from April 2016 to April 2018, followed by a return to dynamic thinning. We observe contrasting patterns of mass loss acceleration in different basins across the ice sheet and suggest that these spatiotemporal trends could be useful for calibrating and validating prognostic ice sheet models. In addition to resolving the spatial and temporal fingerprint of Greenland's recent ice loss, these mass loss grids are key for partitioning contemporary elastic vertical land motion from longer-term glacial isostatic adjustment (GIA) trends at GPS stations around the ice sheet. Our ice-loss product results in a significantly different GIA interpretation from a previous ice-loss product.

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DO - 10.1029/2021JF006505

M3 - Journal article

C2 - 35864950

SN - 0148-0227

VL - 127

JO - Journal of Geophysical Research: Earth Surface

JF - Journal of Geophysical Research: Earth Surface

IS - 4

M1 - e2021JF006505

ER -

Greenland Mass Trends From Airborne and Satellite Altimetry During 2011–2020

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