Dynamic mass loss from Greenland's marine-terminating peripheral glaciers (1985–2018)
Global glacier mass balance decreased rapidly over the last two decades, exceeding mass loss from the Greenland and Antarctic Ice Sheets. In Greenland, peripheral glaciers and ice caps (GICs) cover only ~5% of Greenland's area but contributed ~20% of the island's ice mass loss between 2000...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press
2023
|
Subjects: | |
Online Access: | https://doi.org/10.1017/jog.2022.52 https://doaj.org/article/af1fb52d6b304a5386db352253392f54 |
id |
ftdoajarticles:oai:doaj.org/article:af1fb52d6b304a5386db352253392f54 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:af1fb52d6b304a5386db352253392f54 2023-05-15T14:13:28+02:00 Dynamic mass loss from Greenland's marine-terminating peripheral glaciers (1985–2018) Katherine E. Bollen Ellyn M. Enderlin Rebecca Muhlheim 2023-02-01T00:00:00Z https://doi.org/10.1017/jog.2022.52 https://doaj.org/article/af1fb52d6b304a5386db352253392f54 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143022000521/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.52 0022-1430 1727-5652 https://doaj.org/article/af1fb52d6b304a5386db352253392f54 Journal of Glaciology, Vol 69, Pp 153-163 (2023) Glacier discharge ice and climate ice dynamics remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1017/jog.2022.52 2023-03-12T01:30:54Z Global glacier mass balance decreased rapidly over the last two decades, exceeding mass loss from the Greenland and Antarctic Ice Sheets. In Greenland, peripheral glaciers and ice caps (GICs) cover only ~5% of Greenland's area but contributed ~20% of the island's ice mass loss between 2000 and 2018. Although Greenland GIC mass loss due to surface meltwater runoff has been estimated using atmospheric models, mass lost to changes in ice discharge into oceans (i.e., dynamic mass loss) remains unquantified. We use the flux gate method to estimate discharge from Greenland's 585 marine-terminating peripheral glaciers between 1985 and 2018, and compute dynamic mass loss as the discharge anomaly relative to the 1985–98 period. Greenland GICs discharged between 2.94 ± 0.23 and 4.03 ± 0.23 Gt a−1 from 1985 to 1998, depending on the gap-filling method, and abruptly increased to 5.10 ± 0.21 Gt a−1 from 1999 to 2018. The resultant ~1–2 Gt a−1 dynamic mass loss was driven by synchronous widespread acceleration around Greenland. The mass loss came predominantly from the southeast region, which contains 39% of the glaciers. Although changes in discharge over time were small relative to surface mass-balance changes, our speed and discharge time series suggest these glaciers may quickly accelerate in response to changes in climate. Article in Journal/Newspaper Antarc* Antarctic glacier Greenland Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Antarctic Greenland Journal of Glaciology 69 273 153 163 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Glacier discharge ice and climate ice dynamics remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Glacier discharge ice and climate ice dynamics remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Katherine E. Bollen Ellyn M. Enderlin Rebecca Muhlheim Dynamic mass loss from Greenland's marine-terminating peripheral glaciers (1985–2018) |
topic_facet |
Glacier discharge ice and climate ice dynamics remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Global glacier mass balance decreased rapidly over the last two decades, exceeding mass loss from the Greenland and Antarctic Ice Sheets. In Greenland, peripheral glaciers and ice caps (GICs) cover only ~5% of Greenland's area but contributed ~20% of the island's ice mass loss between 2000 and 2018. Although Greenland GIC mass loss due to surface meltwater runoff has been estimated using atmospheric models, mass lost to changes in ice discharge into oceans (i.e., dynamic mass loss) remains unquantified. We use the flux gate method to estimate discharge from Greenland's 585 marine-terminating peripheral glaciers between 1985 and 2018, and compute dynamic mass loss as the discharge anomaly relative to the 1985–98 period. Greenland GICs discharged between 2.94 ± 0.23 and 4.03 ± 0.23 Gt a−1 from 1985 to 1998, depending on the gap-filling method, and abruptly increased to 5.10 ± 0.21 Gt a−1 from 1999 to 2018. The resultant ~1–2 Gt a−1 dynamic mass loss was driven by synchronous widespread acceleration around Greenland. The mass loss came predominantly from the southeast region, which contains 39% of the glaciers. Although changes in discharge over time were small relative to surface mass-balance changes, our speed and discharge time series suggest these glaciers may quickly accelerate in response to changes in climate. |
format |
Article in Journal/Newspaper |
author |
Katherine E. Bollen Ellyn M. Enderlin Rebecca Muhlheim |
author_facet |
Katherine E. Bollen Ellyn M. Enderlin Rebecca Muhlheim |
author_sort |
Katherine E. Bollen |
title |
Dynamic mass loss from Greenland's marine-terminating peripheral glaciers (1985–2018) |
title_short |
Dynamic mass loss from Greenland's marine-terminating peripheral glaciers (1985–2018) |
title_full |
Dynamic mass loss from Greenland's marine-terminating peripheral glaciers (1985–2018) |
title_fullStr |
Dynamic mass loss from Greenland's marine-terminating peripheral glaciers (1985–2018) |
title_full_unstemmed |
Dynamic mass loss from Greenland's marine-terminating peripheral glaciers (1985–2018) |
title_sort |
dynamic mass loss from greenland's marine-terminating peripheral glaciers (1985–2018) |
publisher |
Cambridge University Press |
publishDate |
2023 |
url |
https://doi.org/10.1017/jog.2022.52 https://doaj.org/article/af1fb52d6b304a5386db352253392f54 |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic glacier Greenland Journal of Glaciology |
genre_facet |
Antarc* Antarctic glacier Greenland Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 69, Pp 153-163 (2023) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143022000521/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.52 0022-1430 1727-5652 https://doaj.org/article/af1fb52d6b304a5386db352253392f54 |
op_doi |
https://doi.org/10.1017/jog.2022.52 |
container_title |
Journal of Glaciology |
container_volume |
69 |
container_issue |
273 |
container_start_page |
153 |
op_container_end_page |
163 |
_version_ |
1766285930100948992 |