10.5061/DRYAD.H70RXWDJ5
Khan, Shfaqat Abbas
0000-0002-2689-8563
Technical University of Denmark
Bamber, Jonathan L.
0000-0002-2280-2819
University of Bristol
Rignot, Eric
0000-0002-3366-0481
University of California, Irvine
Helm, Veit
0000-0001-7788-9328
Alfred Wegener Institute for Polar and Marine Research
Aschwanden, Andy
0000-0001-8149-2315
University of Alaska Fairbanks
Holland, David M.
0000-0002-5768-0866
New York University
van den Broeke, Michiel R.
Utrecht University
King, Michalea
0000-0002-8138-4362
University of Washington Applied Physics Laboratory
Noël, Brice
0000-0002-7159-5369
Utrecht University
Truffer, Martin
0000-0001-8251-7043
University of Alaska Fairbanks
Humbert, Angelika
0000-0002-0244-8760
Alfred Wegener Institute for Polar and Marine Research
Colgan, William
0000-0001-6334-1660
Geological Survey of Denmark and Greenland
Vijay, Saurabh
0000-0002-8970-9213
Indian Institute of Technology Roorkee
Kuipers Munneke, Peter
0000-0001-5555-3831
Utrecht University
Greenland mass trends from airborne and satellite altimetry during 2011–2020
Dryad
dataset
2021
FOS: Earth and related environmental sciences
Greenland Ice Sheet
satellite altimetry
surface mass balance
surface elevation change
mass changes
Jakobshavn Isbræ
Danmarks Frie Forskningsfond
https://ror.org/05svhj534
1026-00085B
H2020 European Research Council
694188 (GlobalMass)
2022-04-25T00:00:00Z
2022-04-25T00:00:00Z
en
https://doi.org/10.1029/2021jf006505
97984028 bytes
12
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
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 millimeters from April 2011 to April 2020, with the
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. Our gridded satellite altimetry data and
surface mass balance (SMB), along with corrections due to firn compaction
are available for download. Here, we provide: (1) Annual (April to April)
elevation change rates of the Greenland Ice Sheet from April 2011 to April
2020 from CryoSat-2, ICESat-2 and NASA’s ATM flights. 1x1 km grid. (2)
Annual (April to April) elevation change rates due to SMB anomalies. 1x1
km grid. (3) Ice-sheet wide annual corrections due to firn compaction.
We have used radar altimetry data from ESA’s Earth Explorer CryoSat-2
mission (Wingham et al., 2006) to estimate annual mass changes of the GrIS
from April 2011 to April 2020. We supplemented CryoSat-2 data with laser
altimetry observations from NASA’s Operation IceBridge Airborne
Topographic Mapper (ATM) flights from April 2011 to April 2019 (Studinger
et al., 2020). NASA ended its Operation IceBridge measurement over
Greenland in spring 2019, so to fill the gap in laser altimetry data, we
used Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) data from April
2019 to April 2020. We applied corrections for the Earth’s immediate
elastic response to contemporary ice mass changes and a correction for
glacial isostatic adjustment (GIA) using a recent model entitled
“GNET-GIA” (Khan et al., 2016). We converted the observed ice volume
changes to mass changes and considered firn compaction obtained using the
Regional Atmospheric Climate Model (RACMO2.3p2) (Ligtenberg et al., 2018).
Khan, S. A. et al. (2016). Geodetic measurements reveal similarities
between post-Last Glacial Maximum and present-day mass loss from the
Greenland ice sheet. Sci. Adv. 2, e1600931,
https://doi.org/10.1126/sciadv.1600931 Ligtenberg, S. R. M., Kuipers
Munneke, P., Noël, B. P. Y., and van den Broeke, M. R. (2018). Brief
communication: Improved simulation of the present-day Greenland firn layer
(1960–2016), The Cryosphere, 12, 1643–1649,
https://doi.org/10.5194/tc-12-1643-2018. Studinger, M. (2014), updated
2020. IceBridge ATM L2 Icessn Elevation, Slope, and Roughness, Version 2.
[2011-2019]. Boulder, Colorado USA. NASA National Snow and Ice Data Center
Distributed Active Archive Center, https://doi.org/10.5067/CPRXXK3F39RV
Wingham, D. J., Francis, C. R., Baker, S., Bouzinac, C., Brockley, D., et
al. (2006). CryoSat: A mission to 705 determine the fluctuations in
Earth’s land and marine ice fields. In M. Singh, RP and Shea (Ed.),
Natural Hazards and Oceanographic processes from satellite data, 37, pp.
841–871. Elsevier science ltd. https://doi.org/10.1016/j.asr.2005.07.027