LM17.3 - a global vertical land motion model of glacial isostatic adjustment

DOI

We provide a global 0.5-degree grid of vertical land motion (in mm/a) of the LM17.3 glacial isostatic adjustment (GIA) model. The radially varying earth model part is profile VM5a (Peltier et al. 2015). The ice load is different to any other GIA model and combines regional ice loads without taking care of balancing the global sea-level equivalent of all ice sheets and glaciers with that expected from paleo-sea-level indicators. The regional models are: GLAC-1D for North America (Tarasov et al. 2012), HUY3 for Greenland (Lecavalier et al. 2014), GLAC #71340 for Fennoscandia/Barents Sea (Tarasov et al., 2014), ANU-ICE for Iceland, High Mountain Areas, Siberian Mountains and Tibet (Lambeck et al. 2014), IJ04_Patagonia for Patagonia (updated from Ivins & James 2004), ICE-6G_C for New Zealand (Argus et al. 2014, Peltier et al. 2015),* GLAC-1D for Antarctica (Briggs et al. 2014).Additional models (W12, Whitehouse et al. 2012, and IJ05_R2, Ivins et al. 2013, for Antarctica; ANU-ICE, Lambeck et al. 2017, and NAIce, Gowan et al. 2016, for North America) were tested in the development of the model but not used in the end. Little ice age is not included nor any ice mass change during the last 100 years. The eustatic sea-level equivalent at last glacial maximum amounts to 113.8 m for all ice sheets and glaciers together. Because we use an ice model that has not been tuned to fit global constraints, it may highlight areas which cannot match commonly used GIA observations. However, we note that the earth model used in our calculations is different to the earth model used in the development of some regional ice models, e.g. HUY3, ANU-ICE, IJ04_Patagonia (see respective references), thus some differences can be related to this. The LM17.3 model was introduced in Jäggi et al. (2019), and its DDK5-filtered geoid and water heights can be found in the EGSIEM plotter (http://plot.egsiem.eu/index.php?p=timeseries). The GIA model uses material compressibility and includes time-dependent coastlines and rotational feedback. The vertical land motion can be used/tested in sea-level investigations and projections. Work towards a model that incorporates 3D earth structure, and an updated ice model, is ongoing.

Identifier
DOI https://doi.org/10.1594/PANGAEA.932462
Related Identifier IsSupplementTo https://doi.org/10.1093/gji/ggz238
Related Identifier References https://doi.org/10.1093/gji/ggu140
Related Identifier References https://doi.org/10.1016/j.quascirev.2014.09.003
Related Identifier References https://doi.org/10.1016/j.quascirev.2016.03.003
Related Identifier References https://doi.org/10.1029/2004GL021500
Related Identifier References https://doi.org/10.1002/jgrb.50208
Related Identifier References https://doi.org/10.1016/j.quascirev.2016.11.033
Related Identifier References https://doi.org/10.1073/pnas.1411762111
Related Identifier References https://doi.org/10.1016/j.quascirev.2014.07.018
Related Identifier References https://doi.org/10.1002/2014JB011176
Related Identifier References https://doi.org/10.1016/j.epsl.2011.09.010
Related Identifier References https://doi.org/10.1016/j.quascirev.2011.11.016
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.932462
Provenance
Creator Steffen, Holger ORCID logo; Li, Tanghua; Wu, Patrick ORCID logo; Gowan, Evan J ORCID logo; Ivins, Erik; Lecavalier, Benoit; Tarasov, Lev; Whitehouse, Pippa L ORCID logo
Publisher PANGAEA
Publication Year 2021
Funding Reference Horizon 2020 https://doi.org/10.13039/501100007601 Crossref Funder ID 637010 https://cordis.europa.eu/project/id/637010 European Gravity Service for Improved Emergency Management
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format application/zip
Size 1.9 MBytes
Discipline Earth System Research