Applying a distributed mass-balance model to identify uncertainties in glaciological mass balance on Brewster Glacier, New Zealand
Abstract A distributed mass-balance model is used over a 10-year period for the re-analysis of a glaciological mass-balance time series obtained from Brewster Glacier, New Zealand. Mass-balance modelling reveals glaciological mass balance has been overestimated, with an average mass loss of −516 mm...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2023
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/jog.2022.123 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302200123X |
id |
crcambridgeupr:10.1017/jog.2022.123 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/jog.2022.123 2024-06-23T07:54:14+00:00 Applying a distributed mass-balance model to identify uncertainties in glaciological mass balance on Brewster Glacier, New Zealand Abrahim, Bibi Nariefa Cullen, Nicolas James Conway, Jonathan Paul Sirguey, Pascal 2023 http://dx.doi.org/10.1017/jog.2022.123 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302200123X en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 69, issue 276, page 1030-1046 ISSN 0022-1430 1727-5652 journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2022.123 2024-06-12T04:03:54Z Abstract A distributed mass-balance model is used over a 10-year period for the re-analysis of a glaciological mass-balance time series obtained from Brewster Glacier, New Zealand. Mass-balance modelling reveals glaciological mass balance has been overestimated, with an average mass loss of −516 mm w.e. a −1 not captured by observations at the end of the ablation season, which represents 35% of the annual mass balance. While the average length of the accumulation season (199 days) remains longer than the ablation season (166 days), melting is not uncommon in the core part of the accumulation season, with 2–32% of total snowfall being melted. Refreezing of meltwater is also important, with 10% of surface and subsurface melt being refrozen in the present climate. Net radiation, driven primarily by net shortwave radiation, is the main contributor to melt energy, with melt variability mainly influenced by the turbulent heat fluxes, net longwave radiation and the heat flux from precipitation in the ablation season. Snowfalls in summer are an important moderator of melt, highlighting the critical role of the ice-albedo feedback and phase of precipitation on seasonal mass balance. A complete homogenisation of the long-term glaciological mass balance for Brewster Glacier is still required. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Brewster ENVELOPE(169.383,169.383,-72.950,-72.950) New Zealand Journal of Glaciology 1 17 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract A distributed mass-balance model is used over a 10-year period for the re-analysis of a glaciological mass-balance time series obtained from Brewster Glacier, New Zealand. Mass-balance modelling reveals glaciological mass balance has been overestimated, with an average mass loss of −516 mm w.e. a −1 not captured by observations at the end of the ablation season, which represents 35% of the annual mass balance. While the average length of the accumulation season (199 days) remains longer than the ablation season (166 days), melting is not uncommon in the core part of the accumulation season, with 2–32% of total snowfall being melted. Refreezing of meltwater is also important, with 10% of surface and subsurface melt being refrozen in the present climate. Net radiation, driven primarily by net shortwave radiation, is the main contributor to melt energy, with melt variability mainly influenced by the turbulent heat fluxes, net longwave radiation and the heat flux from precipitation in the ablation season. Snowfalls in summer are an important moderator of melt, highlighting the critical role of the ice-albedo feedback and phase of precipitation on seasonal mass balance. A complete homogenisation of the long-term glaciological mass balance for Brewster Glacier is still required. |
format |
Article in Journal/Newspaper |
author |
Abrahim, Bibi Nariefa Cullen, Nicolas James Conway, Jonathan Paul Sirguey, Pascal |
spellingShingle |
Abrahim, Bibi Nariefa Cullen, Nicolas James Conway, Jonathan Paul Sirguey, Pascal Applying a distributed mass-balance model to identify uncertainties in glaciological mass balance on Brewster Glacier, New Zealand |
author_facet |
Abrahim, Bibi Nariefa Cullen, Nicolas James Conway, Jonathan Paul Sirguey, Pascal |
author_sort |
Abrahim, Bibi Nariefa |
title |
Applying a distributed mass-balance model to identify uncertainties in glaciological mass balance on Brewster Glacier, New Zealand |
title_short |
Applying a distributed mass-balance model to identify uncertainties in glaciological mass balance on Brewster Glacier, New Zealand |
title_full |
Applying a distributed mass-balance model to identify uncertainties in glaciological mass balance on Brewster Glacier, New Zealand |
title_fullStr |
Applying a distributed mass-balance model to identify uncertainties in glaciological mass balance on Brewster Glacier, New Zealand |
title_full_unstemmed |
Applying a distributed mass-balance model to identify uncertainties in glaciological mass balance on Brewster Glacier, New Zealand |
title_sort |
applying a distributed mass-balance model to identify uncertainties in glaciological mass balance on brewster glacier, new zealand |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2022.123 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302200123X |
long_lat |
ENVELOPE(169.383,169.383,-72.950,-72.950) |
geographic |
Brewster New Zealand |
geographic_facet |
Brewster New Zealand |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 69, issue 276, page 1030-1046 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2022.123 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
17 |
_version_ |
1802646319564587008 |