Geology datasets in North America, Greenland and surrounding areas for use with ice sheet models
The ice–substrate interface is an important boundary condition for ice sheet modelling. The substrate affects the ice sheet by allowing sliding through sediment deformation and accommodating the storage and drainage of subglacial water. We present three datasets on a 1 : 5 000 000 scale with differe...
Published in: | Earth System Science Data |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2019
|
Subjects: | |
Online Access: | https://doi.org/10.5194/essd-11-375-2019 https://doaj.org/article/dc49b7c843d44ea698243c6a35b7ef32 |
id |
ftdoajarticles:oai:doaj.org/article:dc49b7c843d44ea698243c6a35b7ef32 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:dc49b7c843d44ea698243c6a35b7ef32 2023-05-15T16:28:15+02:00 Geology datasets in North America, Greenland and surrounding areas for use with ice sheet models E. J. Gowan L. Niu G. Knorr G. Lohmann 2019-03-01T00:00:00Z https://doi.org/10.5194/essd-11-375-2019 https://doaj.org/article/dc49b7c843d44ea698243c6a35b7ef32 EN eng Copernicus Publications https://www.earth-syst-sci-data.net/11/375/2019/essd-11-375-2019.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-11-375-2019 1866-3508 1866-3516 https://doaj.org/article/dc49b7c843d44ea698243c6a35b7ef32 Earth System Science Data, Vol 11, Pp 375-391 (2019) Environmental sciences GE1-350 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/essd-11-375-2019 2022-12-31T12:31:24Z The ice–substrate interface is an important boundary condition for ice sheet modelling. The substrate affects the ice sheet by allowing sliding through sediment deformation and accommodating the storage and drainage of subglacial water. We present three datasets on a 1 : 5 000 000 scale with different geological parameters for the region that was covered by the ice sheets in North America, including Greenland and Iceland. The first dataset includes the distribution of surficial sediments, which is separated into continuous, discontinuous and predominantly rock categories. The second dataset includes sediment grain size properties, which is divided into three classes: clay, silt and sand, based on the dominant grain size of the fine fraction of the glacial sediments. The third dataset is the generalized bedrock geology. We demonstrate the utility of these datasets for governing ice sheet dynamics by using an ice sheet model with a simulation that extends through the last glacial cycle. In order to demonstrate the importance of the basal boundary conditions for ice sheet modelling, we changed the shear friction angle to account for a weaker substrate and found changes up to 40 % in ice thickness compared to a reference run. Although incorporation of the ice–bed boundary remains model dependent, our dataset provides an observational baseline for improving a critical weakness in current ice sheet modelling ( https://doi.org/10.1594/PANGAEA.895889 , Gowan et al. , 2018 b ). Article in Journal/Newspaper Greenland Ice Sheet Iceland Directory of Open Access Journals: DOAJ Articles Greenland Earth System Science Data 11 1 375 391 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 E. J. Gowan L. Niu G. Knorr G. Lohmann Geology datasets in North America, Greenland and surrounding areas for use with ice sheet models |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The ice–substrate interface is an important boundary condition for ice sheet modelling. The substrate affects the ice sheet by allowing sliding through sediment deformation and accommodating the storage and drainage of subglacial water. We present three datasets on a 1 : 5 000 000 scale with different geological parameters for the region that was covered by the ice sheets in North America, including Greenland and Iceland. The first dataset includes the distribution of surficial sediments, which is separated into continuous, discontinuous and predominantly rock categories. The second dataset includes sediment grain size properties, which is divided into three classes: clay, silt and sand, based on the dominant grain size of the fine fraction of the glacial sediments. The third dataset is the generalized bedrock geology. We demonstrate the utility of these datasets for governing ice sheet dynamics by using an ice sheet model with a simulation that extends through the last glacial cycle. In order to demonstrate the importance of the basal boundary conditions for ice sheet modelling, we changed the shear friction angle to account for a weaker substrate and found changes up to 40 % in ice thickness compared to a reference run. Although incorporation of the ice–bed boundary remains model dependent, our dataset provides an observational baseline for improving a critical weakness in current ice sheet modelling ( https://doi.org/10.1594/PANGAEA.895889 , Gowan et al. , 2018 b ). |
format |
Article in Journal/Newspaper |
author |
E. J. Gowan L. Niu G. Knorr G. Lohmann |
author_facet |
E. J. Gowan L. Niu G. Knorr G. Lohmann |
author_sort |
E. J. Gowan |
title |
Geology datasets in North America, Greenland and surrounding areas for use with ice sheet models |
title_short |
Geology datasets in North America, Greenland and surrounding areas for use with ice sheet models |
title_full |
Geology datasets in North America, Greenland and surrounding areas for use with ice sheet models |
title_fullStr |
Geology datasets in North America, Greenland and surrounding areas for use with ice sheet models |
title_full_unstemmed |
Geology datasets in North America, Greenland and surrounding areas for use with ice sheet models |
title_sort |
geology datasets in north america, greenland and surrounding areas for use with ice sheet models |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/essd-11-375-2019 https://doaj.org/article/dc49b7c843d44ea698243c6a35b7ef32 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Iceland |
genre_facet |
Greenland Ice Sheet Iceland |
op_source |
Earth System Science Data, Vol 11, Pp 375-391 (2019) |
op_relation |
https://www.earth-syst-sci-data.net/11/375/2019/essd-11-375-2019.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-11-375-2019 1866-3508 1866-3516 https://doaj.org/article/dc49b7c843d44ea698243c6a35b7ef32 |
op_doi |
https://doi.org/10.5194/essd-11-375-2019 |
container_title |
Earth System Science Data |
container_volume |
11 |
container_issue |
1 |
container_start_page |
375 |
op_container_end_page |
391 |
_version_ |
1766017886851170304 |