Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL097232 |
GPS rates of vertical bedrock motion suggest late Holocene ice-sheet readvance in a critical sector of East Antarctica | |
Matt A. King; Christopher S. Watson; Duanne White | |
2022-02-11 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2022 |
英文摘要 | We investigate present-day bedrock vertical motion using new GPS timeseries from the Totten-Denman glacier region of East Antarctica (∼77-120°E) where models of glacial isostatic adjustment (GIA) disagree, glaciers are likely losing mass, and few data constraints on GIA exist. We show that varying surface mass balance loading (SMBL) is a dominant signal, contributing random-walk-like noise to GPS timeseries across Antarctica. In the study region, it induces site velocity biases of up to ∼+1 mm/yr over 2010-2020. After correcting for SMBL displacement and GPS common mode error, subsidence is evident at all sites aside from the Totten Glacier region where uplift is ∼1.5 mm/yr. Uplift near the Totten Glacier is consistent with late Holocene ice retreat while the widespread subsidence further west suggests possible late Holocene readvance of the region’s ice sheet, in broad agreement with limited glacial geological data and highlighting the need for sampling beneath the current ice sheet. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/346754 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Matt A. King,Christopher S. Watson,Duanne White. GPS rates of vertical bedrock motion suggest late Holocene ice-sheet readvance in a critical sector of East Antarctica[J]. Geophysical Research Letters,2022. |
APA | Matt A. King,Christopher S. Watson,&Duanne White.(2022).GPS rates of vertical bedrock motion suggest late Holocene ice-sheet readvance in a critical sector of East Antarctica.Geophysical Research Letters. |
MLA | Matt A. King,et al."GPS rates of vertical bedrock motion suggest late Holocene ice-sheet readvance in a critical sector of East Antarctica".Geophysical Research Letters (2022). |
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