Calibration of a frontal ablation parameterisation applied to Greenland's peripheral calving glaciers
Abstract We calibrate the calving parameterisation implemented in the Open Global Glacier Model via two methods (velocity constraint and surface mass balance (SMB) constraint) and assess the impact of accounting for frontal ablation on the ice volume estimate of Greenland tidewater peripheral glacie...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/jog.2021.63 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021000630 |
id |
crcambridgeupr:10.1017/jog.2021.63 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/jog.2021.63 2024-06-23T07:53:02+00:00 Calibration of a frontal ablation parameterisation applied to Greenland's peripheral calving glaciers Recinos, Beatriz Maussion, Fabien Noël, Brice Möller, Marco Marzeion, Ben 2021 http://dx.doi.org/10.1017/jog.2021.63 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021000630 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 67, issue 266, page 1177-1189 ISSN 0022-1430 1727-5652 journal-article 2021 crcambridgeupr https://doi.org/10.1017/jog.2021.63 2024-05-29T08:09:39Z Abstract We calibrate the calving parameterisation implemented in the Open Global Glacier Model via two methods (velocity constraint and surface mass balance (SMB) constraint) and assess the impact of accounting for frontal ablation on the ice volume estimate of Greenland tidewater peripheral glaciers (PGs). We estimate an average regional frontal ablation flux of 7.38±3.45 Gta −1 after calibrating the model with two different satellite velocity products, and of 0.69±0.49 Gta −1 if the model is constrained using frontal ablation fluxes derived from independent modelled SMB averaged over an equilibrium reference period (1961–90). This second method makes the assumption that most PGs during that time have an equilibrium between mass gain via SMB and mass loss via frontal ablation. This assumption serves as a basis to assess the order of magnitude of dynamic mass loss of glaciers when compared to the SMB imbalance. The differences between results from both methods indicate how strong the dynamic imbalance might have been for PGs during that reference period. Including frontal ablation increases the estimated regional ice volume of PGs, from 14.47 to 14.64±0.12 mm sea level equivalent when using the SMB method and to 15.84±0.32 mm sea level equivalent when using the velocity method. Article in Journal/Newspaper glacier Greenland Journal of Glaciology Tidewater Cambridge University Press Greenland Journal of Glaciology 1 13 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract We calibrate the calving parameterisation implemented in the Open Global Glacier Model via two methods (velocity constraint and surface mass balance (SMB) constraint) and assess the impact of accounting for frontal ablation on the ice volume estimate of Greenland tidewater peripheral glaciers (PGs). We estimate an average regional frontal ablation flux of 7.38±3.45 Gta −1 after calibrating the model with two different satellite velocity products, and of 0.69±0.49 Gta −1 if the model is constrained using frontal ablation fluxes derived from independent modelled SMB averaged over an equilibrium reference period (1961–90). This second method makes the assumption that most PGs during that time have an equilibrium between mass gain via SMB and mass loss via frontal ablation. This assumption serves as a basis to assess the order of magnitude of dynamic mass loss of glaciers when compared to the SMB imbalance. The differences between results from both methods indicate how strong the dynamic imbalance might have been for PGs during that reference period. Including frontal ablation increases the estimated regional ice volume of PGs, from 14.47 to 14.64±0.12 mm sea level equivalent when using the SMB method and to 15.84±0.32 mm sea level equivalent when using the velocity method. |
format |
Article in Journal/Newspaper |
author |
Recinos, Beatriz Maussion, Fabien Noël, Brice Möller, Marco Marzeion, Ben |
spellingShingle |
Recinos, Beatriz Maussion, Fabien Noël, Brice Möller, Marco Marzeion, Ben Calibration of a frontal ablation parameterisation applied to Greenland's peripheral calving glaciers |
author_facet |
Recinos, Beatriz Maussion, Fabien Noël, Brice Möller, Marco Marzeion, Ben |
author_sort |
Recinos, Beatriz |
title |
Calibration of a frontal ablation parameterisation applied to Greenland's peripheral calving glaciers |
title_short |
Calibration of a frontal ablation parameterisation applied to Greenland's peripheral calving glaciers |
title_full |
Calibration of a frontal ablation parameterisation applied to Greenland's peripheral calving glaciers |
title_fullStr |
Calibration of a frontal ablation parameterisation applied to Greenland's peripheral calving glaciers |
title_full_unstemmed |
Calibration of a frontal ablation parameterisation applied to Greenland's peripheral calving glaciers |
title_sort |
calibration of a frontal ablation parameterisation applied to greenland's peripheral calving glaciers |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/jog.2021.63 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021000630 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Journal of Glaciology Tidewater |
genre_facet |
glacier Greenland Journal of Glaciology Tidewater |
op_source |
Journal of Glaciology volume 67, issue 266, page 1177-1189 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2021.63 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
13 |
_version_ |
1802644515910057984 |