Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift

Research output: Contribution to journal › Letter › Research › peer-review

Standard

Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift. / Hansen, Karina; Truffer, Martin; Aschwanden, Andy; Mankoff, Kenneth; Bevis, Michael; Humbert, Angelika; van den Broeke, Michiel R.; Noël, Brice; Bjørk, Anders; Colgan, William; Kjær, Kurt H.; Adhikari, Surendra; Barletta, Valentina; Khan, Shfaqat A.

In: Geophysical Research Letters, Vol. 48, No. 14, e2021GL094252, 2021.

Research output: Contribution to journal › Letter › Research › peer-review

Harvard

Hansen, K, Truffer, M, Aschwanden, A, Mankoff, K, Bevis, M, Humbert, A, van den Broeke, MR, Noël, B, Bjørk, A, Colgan, W, Kjær, KH, Adhikari, S, Barletta, V & Khan, SA 2021, 'Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift', Geophysical Research Letters, vol. 48, no. 14, e2021GL094252. https://doi.org/10.1029/2021GL094252

APA

Hansen, K., Truffer, M., Aschwanden, A., Mankoff, K., Bevis, M., Humbert, A., van den Broeke, M. R., Noël, B., Bjørk, A., Colgan, W., Kjær, K. H., Adhikari, S., Barletta, V., & Khan, S. A. (2021). Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift. Geophysical Research Letters, 48(14), [e2021GL094252]. https://doi.org/10.1029/2021GL094252

Vancouver

Hansen K, Truffer M, Aschwanden A, Mankoff K, Bevis M, Humbert A et al. Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift. Geophysical Research Letters. 2021;48(14). e2021GL094252. https://doi.org/10.1029/2021GL094252

Author

Hansen, Karina ; Truffer, Martin ; Aschwanden, Andy ; Mankoff, Kenneth ; Bevis, Michael ; Humbert, Angelika ; van den Broeke, Michiel R. ; Noël, Brice ; Bjørk, Anders ; Colgan, William ; Kjær, Kurt H. ; Adhikari, Surendra ; Barletta, Valentina ; Khan, Shfaqat A. / Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift. In: Geophysical Research Letters. 2021 ; Vol. 48, No. 14.

Bibtex

@article{017f21cfb2bc4f77b36998f38c20b907,
title = "Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift",
abstract = "We present a novel method to estimate dynamic ice loss of Greenland's three largest outlet glaciers: Jakobshavn Isbr{\ae}, Kangerlussuaq Glacier, and Helheim Glacier. We use Global Navigation Satellite System (GNSS) stations attached to bedrock to measure elastic displacements of the solid Earth caused by dynamic thinning near the glacier terminus. When we compare our results with discharge, we find a time lag between glacier speedup/slowdown and onset of dynamic thinning/thickening. Our results show that dynamic thinning/thickening on Jakobshavn Isbr{\ae} occurs 0.87 ± 0.07 years before speedup/slowdown. This implies that using GNSS time series we are able to predict speedup/slowdown of Jakobshavn Isbr{\ae} by up to 10.4 months. For Kangerlussuaq Glacier the lag between thinning/thickening and speedup/slowdown is 0.37 ± 0.17 years (4.4 months). Our methodology and results could be important for studies that attempt to model and understand mechanisms controlling short-term dynamic fluctuations of outlet glaciers in Greenland.",
keywords = "glaciers, Greenland, ice discharge, ice loss, land uplift, surface mass balance",
author = "Karina Hansen and Martin Truffer and Andy Aschwanden and Kenneth Mankoff and Michael Bevis and Angelika Humbert and {van den Broeke}, {Michiel R.} and Brice No{\"e}l and Anders Bj{\o}rk and William Colgan and Kj{\ae}r, {Kurt H.} and Surendra Adhikari and Valentina Barletta and Khan, {Shfaqat A.}",
note = "Publisher Copyright: {\textcopyright} 2021. The Authors.",
year = "2021",
doi = "10.1029/2021GL094252",
language = "English",
volume = "48",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "Wiley-Blackwell",
number = "14",

}

RIS

TY - JOUR

T1 - Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift

AU - Hansen, Karina

AU - Truffer, Martin

AU - Aschwanden, Andy

AU - Mankoff, Kenneth

AU - Bevis, Michael

AU - Humbert, Angelika

AU - van den Broeke, Michiel R.

AU - Noël, Brice

AU - Bjørk, Anders

AU - Colgan, William

AU - Kjær, Kurt H.

AU - Adhikari, Surendra

AU - Barletta, Valentina

AU - Khan, Shfaqat A.

N1 - Publisher Copyright: © 2021. The Authors.

PY - 2021

Y1 - 2021

N2 - We present a novel method to estimate dynamic ice loss of Greenland's three largest outlet glaciers: Jakobshavn Isbræ, Kangerlussuaq Glacier, and Helheim Glacier. We use Global Navigation Satellite System (GNSS) stations attached to bedrock to measure elastic displacements of the solid Earth caused by dynamic thinning near the glacier terminus. When we compare our results with discharge, we find a time lag between glacier speedup/slowdown and onset of dynamic thinning/thickening. Our results show that dynamic thinning/thickening on Jakobshavn Isbræ occurs 0.87 ± 0.07 years before speedup/slowdown. This implies that using GNSS time series we are able to predict speedup/slowdown of Jakobshavn Isbræ by up to 10.4 months. For Kangerlussuaq Glacier the lag between thinning/thickening and speedup/slowdown is 0.37 ± 0.17 years (4.4 months). Our methodology and results could be important for studies that attempt to model and understand mechanisms controlling short-term dynamic fluctuations of outlet glaciers in Greenland.

AB - We present a novel method to estimate dynamic ice loss of Greenland's three largest outlet glaciers: Jakobshavn Isbræ, Kangerlussuaq Glacier, and Helheim Glacier. We use Global Navigation Satellite System (GNSS) stations attached to bedrock to measure elastic displacements of the solid Earth caused by dynamic thinning near the glacier terminus. When we compare our results with discharge, we find a time lag between glacier speedup/slowdown and onset of dynamic thinning/thickening. Our results show that dynamic thinning/thickening on Jakobshavn Isbræ occurs 0.87 ± 0.07 years before speedup/slowdown. This implies that using GNSS time series we are able to predict speedup/slowdown of Jakobshavn Isbræ by up to 10.4 months. For Kangerlussuaq Glacier the lag between thinning/thickening and speedup/slowdown is 0.37 ± 0.17 years (4.4 months). Our methodology and results could be important for studies that attempt to model and understand mechanisms controlling short-term dynamic fluctuations of outlet glaciers in Greenland.

KW - glaciers

KW - Greenland

KW - ice discharge

KW - ice loss

KW - land uplift

KW - surface mass balance

U2 - 10.1029/2021GL094252

DO - 10.1029/2021GL094252

M3 - Letter

AN - SCOPUS:85111492929

VL - 48

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 14

M1 - e2021GL094252

ER -

ID: 281652553