Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast
Tide gauge records of recent sea-level change along the U.S. east coast have received significant attention within the literature of glacial isostatic adjustment (GIA). Geographic trends in these tide gauge rates are not reduced by a GIA correction based on a commonly adopted radial viscosity profil...
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ftnerc:oai:nora.nerc.ac.uk:6483 2023-05-15T16:35:30+02:00 Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast Davis, Jonathan E. Latychev, Konstantin Mitrovica, Jerry X. Kendall, Roblyn Tamisiea, Mark, E 2008 http://nora.nerc.ac.uk/id/eprint/6483/ http://www.sciencedirect.com/science/article/B6V9X-4SNGM9D-1/2/d73759ae2e2e6615c6efb02dc0ae4f43 unknown Davis, Jonathan E.; Latychev, Konstantin; Mitrovica, Jerry X.; Kendall, Roblyn; Tamisiea, Mark, E. 2008 Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast. Journal of Geodynamics, 46 (3-5). 90-94. https://doi.org/10.1016/j.jog.2008.04.007 <https://doi.org/10.1016/j.jog.2008.04.007> Marine Sciences Publication - Article PeerReviewed 2008 ftnerc https://doi.org/10.1016/j.jog.2008.04.007 2023-02-04T19:24:17Z Tide gauge records of recent sea-level change along the U.S. east coast have received significant attention within the literature of glacial isostatic adjustment (GIA). Geographic trends in these tide gauge rates are not reduced by a GIA correction based on a commonly adopted radial viscosity profile (characterized, in particular, by a lower mantle viscosity ~1-2×1021 Pa s), and this has led to speculation that the residual trends reflect contributions from neotectonics or oceanographic processes. While the trends can be significantly reduced by adopting an Earth model with a stiffer lower mantle, such a model appears to be incompatible with independent constraints from post-glacial decay times in Hudson Bay. We use a finite-element model of the GIA process to investigate whether 3-D viscosity variations superimposed onto the "common" radial viscosity profile may provide a route to reconciling the east coast sea-level trends. We find that the specific 3-D structure we impose has little impact on the geographic trends in the GIA-corrected rates. However, we do find that the imposed lateral variations in lower mantle viscosity introduce a nearly uniform upward shift of 0.5 mm/yr in GIA-induced sea-level rates along the U.S. east coast. Thus, inferences of regional (U.S. east coast) sea-level rise due to modern melting of ice reservoirs, based on tide gauge rates corrected using 1-D GIA models, may be significantly biased by this simplifying assumption. Article in Journal/Newspaper Hudson Bay Natural Environment Research Council: NERC Open Research Archive Hudson Bay Hudson Journal of Geodynamics 46 3-5 90 94 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences |
spellingShingle |
Marine Sciences Davis, Jonathan E. Latychev, Konstantin Mitrovica, Jerry X. Kendall, Roblyn Tamisiea, Mark, E Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast |
topic_facet |
Marine Sciences |
description |
Tide gauge records of recent sea-level change along the U.S. east coast have received significant attention within the literature of glacial isostatic adjustment (GIA). Geographic trends in these tide gauge rates are not reduced by a GIA correction based on a commonly adopted radial viscosity profile (characterized, in particular, by a lower mantle viscosity ~1-2×1021 Pa s), and this has led to speculation that the residual trends reflect contributions from neotectonics or oceanographic processes. While the trends can be significantly reduced by adopting an Earth model with a stiffer lower mantle, such a model appears to be incompatible with independent constraints from post-glacial decay times in Hudson Bay. We use a finite-element model of the GIA process to investigate whether 3-D viscosity variations superimposed onto the "common" radial viscosity profile may provide a route to reconciling the east coast sea-level trends. We find that the specific 3-D structure we impose has little impact on the geographic trends in the GIA-corrected rates. However, we do find that the imposed lateral variations in lower mantle viscosity introduce a nearly uniform upward shift of 0.5 mm/yr in GIA-induced sea-level rates along the U.S. east coast. Thus, inferences of regional (U.S. east coast) sea-level rise due to modern melting of ice reservoirs, based on tide gauge rates corrected using 1-D GIA models, may be significantly biased by this simplifying assumption. |
format |
Article in Journal/Newspaper |
author |
Davis, Jonathan E. Latychev, Konstantin Mitrovica, Jerry X. Kendall, Roblyn Tamisiea, Mark, E |
author_facet |
Davis, Jonathan E. Latychev, Konstantin Mitrovica, Jerry X. Kendall, Roblyn Tamisiea, Mark, E |
author_sort |
Davis, Jonathan E. |
title |
Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast |
title_short |
Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast |
title_full |
Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast |
title_fullStr |
Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast |
title_full_unstemmed |
Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast |
title_sort |
glacial isostatic adjustment in 3-d earth models: implications for the analysis of tide gauge records along the u.s. east coast |
publishDate |
2008 |
url |
http://nora.nerc.ac.uk/id/eprint/6483/ http://www.sciencedirect.com/science/article/B6V9X-4SNGM9D-1/2/d73759ae2e2e6615c6efb02dc0ae4f43 |
geographic |
Hudson Bay Hudson |
geographic_facet |
Hudson Bay Hudson |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_relation |
Davis, Jonathan E.; Latychev, Konstantin; Mitrovica, Jerry X.; Kendall, Roblyn; Tamisiea, Mark, E. 2008 Glacial isostatic adjustment in 3-D earth models: Implications for the analysis of tide gauge records along the U.S. east coast. Journal of Geodynamics, 46 (3-5). 90-94. https://doi.org/10.1016/j.jog.2008.04.007 <https://doi.org/10.1016/j.jog.2008.04.007> |
op_doi |
https://doi.org/10.1016/j.jog.2008.04.007 |
container_title |
Journal of Geodynamics |
container_volume |
46 |
container_issue |
3-5 |
container_start_page |
90 |
op_container_end_page |
94 |
_version_ |
1766025726043095040 |