Greenland Ice Sheet solid ice discharge from 1986 through 2017
We present a 1986 through 2017 estimate of Greenland Ice Sheet ice discharge. Our data include all discharging ice that flows faster than 100 m yr−1 and are generated through an automatic and adaptable method, as opposed to conventional hand-picked gates. We position gates near the present-year term...
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Copernicus Publications
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Online Access: | https://doi.org/10.5194/essd-11-769-2019 https://www.earth-syst-sci-data.net/11/769/2019/essd-11-769-2019.pdf https://doaj.org/article/1620fcfe5c504ed9b8a1a4311a9de1ec |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:1620fcfe5c504ed9b8a1a4311a9de1ec 2023-05-15T16:21:28+02:00 Greenland Ice Sheet solid ice discharge from 1986 through 2017 K. D. Mankoff W. Colgan A. Solgaard N. B. Karlsson A. P. Ahlstrøm D. van As J. E. Box S. A. Khan K. K. Kjeldsen J. Mouginot R. S. Fausto 2019-06-01 https://doi.org/10.5194/essd-11-769-2019 https://www.earth-syst-sci-data.net/11/769/2019/essd-11-769-2019.pdf https://doaj.org/article/1620fcfe5c504ed9b8a1a4311a9de1ec en eng Copernicus Publications doi:10.5194/essd-11-769-2019 1866-3508 1866-3516 https://www.earth-syst-sci-data.net/11/769/2019/essd-11-769-2019.pdf https://doaj.org/article/1620fcfe5c504ed9b8a1a4311a9de1ec undefined Earth System Science Data, Vol 11, Pp 769-786 (2019) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.5194/essd-11-769-2019 2023-01-22T17:47:11Z We present a 1986 through 2017 estimate of Greenland Ice Sheet ice discharge. Our data include all discharging ice that flows faster than 100 m yr−1 and are generated through an automatic and adaptable method, as opposed to conventional hand-picked gates. We position gates near the present-year termini and estimate problematic bed topography (ice thickness) values where necessary. In addition to using annual time-varying ice thickness, our time series uses velocity maps that begin with sparse spatial and temporal coverage and end with near-complete spatial coverage and 6 d updates to velocity. The 2010 through 2017 average ice discharge through the flux gates is ∼488±49 Gt yr−1. The 10 % uncertainty stems primarily from uncertain ice bed location (ice thickness). We attribute the ∼50 Gt yr−1 differences among our results and previous studies to our use of updated bed topography from BedMachine v3. Discharge is approximately steady from 1986 to 2000, increases sharply from 2000 to 2005, and then is approximately steady again. However, regional and glacier variability is more pronounced, with recent decreases at most major glaciers and in all but one region offset by increases in the NW (northwestern) region. As part of the journal's living archive option, all input data, code, and results from this study will be updated when new input data are accessible and made freely available at https://doi.org/10.22008/promice/data/ice_discharge. Article in Journal/Newspaper glacier Greenland Ice Sheet Unknown Greenland Earth System Science Data 11 2 769 786 |
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Unknown |
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fttriple |
language |
English |
topic |
envir geo |
spellingShingle |
envir geo K. D. Mankoff W. Colgan A. Solgaard N. B. Karlsson A. P. Ahlstrøm D. van As J. E. Box S. A. Khan K. K. Kjeldsen J. Mouginot R. S. Fausto Greenland Ice Sheet solid ice discharge from 1986 through 2017 |
topic_facet |
envir geo |
description |
We present a 1986 through 2017 estimate of Greenland Ice Sheet ice discharge. Our data include all discharging ice that flows faster than 100 m yr−1 and are generated through an automatic and adaptable method, as opposed to conventional hand-picked gates. We position gates near the present-year termini and estimate problematic bed topography (ice thickness) values where necessary. In addition to using annual time-varying ice thickness, our time series uses velocity maps that begin with sparse spatial and temporal coverage and end with near-complete spatial coverage and 6 d updates to velocity. The 2010 through 2017 average ice discharge through the flux gates is ∼488±49 Gt yr−1. The 10 % uncertainty stems primarily from uncertain ice bed location (ice thickness). We attribute the ∼50 Gt yr−1 differences among our results and previous studies to our use of updated bed topography from BedMachine v3. Discharge is approximately steady from 1986 to 2000, increases sharply from 2000 to 2005, and then is approximately steady again. However, regional and glacier variability is more pronounced, with recent decreases at most major glaciers and in all but one region offset by increases in the NW (northwestern) region. As part of the journal's living archive option, all input data, code, and results from this study will be updated when new input data are accessible and made freely available at https://doi.org/10.22008/promice/data/ice_discharge. |
format |
Article in Journal/Newspaper |
author |
K. D. Mankoff W. Colgan A. Solgaard N. B. Karlsson A. P. Ahlstrøm D. van As J. E. Box S. A. Khan K. K. Kjeldsen J. Mouginot R. S. Fausto |
author_facet |
K. D. Mankoff W. Colgan A. Solgaard N. B. Karlsson A. P. Ahlstrøm D. van As J. E. Box S. A. Khan K. K. Kjeldsen J. Mouginot R. S. Fausto |
author_sort |
K. D. Mankoff |
title |
Greenland Ice Sheet solid ice discharge from 1986 through 2017 |
title_short |
Greenland Ice Sheet solid ice discharge from 1986 through 2017 |
title_full |
Greenland Ice Sheet solid ice discharge from 1986 through 2017 |
title_fullStr |
Greenland Ice Sheet solid ice discharge from 1986 through 2017 |
title_full_unstemmed |
Greenland Ice Sheet solid ice discharge from 1986 through 2017 |
title_sort |
greenland ice sheet solid ice discharge from 1986 through 2017 |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/essd-11-769-2019 https://www.earth-syst-sci-data.net/11/769/2019/essd-11-769-2019.pdf https://doaj.org/article/1620fcfe5c504ed9b8a1a4311a9de1ec |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_source |
Earth System Science Data, Vol 11, Pp 769-786 (2019) |
op_relation |
doi:10.5194/essd-11-769-2019 1866-3508 1866-3516 https://www.earth-syst-sci-data.net/11/769/2019/essd-11-769-2019.pdf https://doaj.org/article/1620fcfe5c504ed9b8a1a4311a9de1ec |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/essd-11-769-2019 |
container_title |
Earth System Science Data |
container_volume |
11 |
container_issue |
2 |
container_start_page |
769 |
op_container_end_page |
786 |
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1766009467937226752 |