气候变化领域集成服务门户(CCPortal): Uncertainties of Glacial Isostatic Adjustment Model Predictions in North America Associated With 3D Structure

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DOI	10.1029/2020GL087944
	Uncertainties of Glacial Isostatic Adjustment Model Predictions in North America Associated With 3D Structure
	Li T.; Wu P.; Wang H.; Steffen H.; Khan N.S.; Engelhart S.E.; Vacchi M.; Shaw T.A.; Peltier W.R.; Horton B.P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:10
英文摘要	We quantify GIA prediction uncertainties of 250 1D and 3D glacial isostatic adjustment (GIA) models through comparisons with deglacial relative sea-level (RSL) data from North America and rate of vertical land motion ((Formula presented.)) and gravity rate of change ((Formula presented.)) from GNSS and GRACE data, respectively. Spatially, the size of the RSL uncertainties varies across North America with the largest from Hudson Bay and near previous ice margins along the northern Atlantic and Pacific coasts, which suggests 3D viscosity structure in the lower mantle and laterally varying lithospheric thickness. Temporally, RSL uncertainties decrease from the Last Glacial Maximum to present except for west of Hudson Bay and the northeastern Pacific coast. The uncertainties of both these regions increase from 30 to 45 m between 15 and 11 ka BP, which may be due to the rapid decrease of surface loading at that time. Present-day (Formula presented.) and (Formula presented.) uncertainties are largest in southwestern Hudson Bay with magnitudes of 2.4 mm/year and 0.4 μGal/year, mainly due to the 3D viscosity structure in the lower mantle. ©2020. The Authors.
英文关键词	Sea level; Viscosity; Glacial isostatic adjustment; Glacial isostatic adjustment models; Last Glacial Maximum; Lithospheric thickness; North-eastern Pacific; Prediction uncertainty; Relative sea level; Vertical land motions; Glacial geology; deglaciation; glacioisostasy; GNSS; GRACE; ice margin; Last Glacial Maximum; lower mantle; satellite data; three-dimensional modeling; uncertainty analysis; Atlantic Ocean; Atlantic Ocean (North); Canada; Hudson Bay; Pacific Ocean; Pacific Ocean (Northeast)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170335
作者单位	Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore; Department of Earth Sciences and the Swire Marine Institute, University of Hong Kong, Hong Kong; Department of Geoscience, University of Calgary, Calgary, AB, Canada; State Key Laboratory of Geodesy and Earth's Dynamics Institute of Geodesy and Geophysics, Chinese Academy of Science, Wuhan, China; Geodata Division, Lantmäteriet, Gävle, Sweden; Department of Geography, Durham University, Durham, United Kingdom; Dipartimento di Scienze della Terra, Università di Pisa, Pisa, Italy; Asian School of the Environment, Nanyang Technological University, Singapore, Singapore; Department of Physics, University of Toronto, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Li T.,Wu P.,Wang H.,et al. Uncertainties of Glacial Isostatic Adjustment Model Predictions in North America Associated With 3D Structure[J],2020,47(10).
APA	Li T..,Wu P..,Wang H..,Steffen H..,Khan N.S..,...&Horton B.P..(2020).Uncertainties of Glacial Isostatic Adjustment Model Predictions in North America Associated With 3D Structure.Geophysical Research Letters,47(10).
MLA	Li T.,et al."Uncertainties of Glacial Isostatic Adjustment Model Predictions in North America Associated With 3D Structure".Geophysical Research Letters 47.10(2020).