气候变化领域集成服务门户(CCPortal): Complex Patterns of Antarctic Ice Sheet Mass Change Resolved by Time-Dependent Rate Modeling of GRACE and GRACE Follow-On Observations

CCPortal

DOI	10.1029/2020GL090961
	Complex Patterns of Antarctic Ice Sheet Mass Change Resolved by Time-Dependent Rate Modeling of GRACE and GRACE Follow-On Observations
	Wang L.; Davis J.L.; Howat I.M.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:1
英文摘要	The Antarctic Ice Sheet (AIS) is a major contributor to current global sea-level change and the largest potential source of future sea-level change. Variability in AIS mass balance on a wide range of spatiotemporal scales obscures secular trends, increasing the uncertainty of projections. We introduce a novel approach for analyzing satellite gravity observations to estimate time-varying mass-change rates and resolve the time scales and amplitudes of rate fluctuations. The new analysis resolves a higher degree of variability than expected over all AIS sectors. Quantifying rate fluctuations on a range of time scales, we demonstrate that loss from the West AIS is characterized by a multidecadal trend, whereas variations of the East AIS are dominated by substantial, short-term accumulation changes that impact AIS mass balance as whole. These complex spatiotemporal variabilities highlight the need to include stochastic processes in estimates of loss rates. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Automatic identification; Geodetic satellites; Glaciers; Random processes; Sea level; Stochastic systems; Antarctic ice sheets; Degree of variability; Global sea levels; Potential sources; Rate fluctuations; Satellite gravity; Spatio-temporal scale; Spatiotemporal variability; Gravitation; complexity; glacier mass balance; GRACE; ice sheet; observational method; satellite data; sea ice; sea level change; spatiotemporal analysis; time dependent behavior; uncertainty analysis; Antarctic Ice Sheet; Antarctica
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/169226
作者单位	Department of Civil, Environmental and Geodetic Engineering, Ohio State University, Columbus, OH, United States; Core Faculty, Translational Data Analytics Institute, Ohio State University, Columbus, OH, United States; Lamont-Dohery Earth Observatory of Columbia University, Palisades, NY, United States; Byrd Polar Climate Research Center, Ohio State University, Columbus, OH, United States; School of Earth Sciences, Ohio State University, Columbus, OH, United States
推荐引用方式 GB/T 7714	Wang L.,Davis J.L.,Howat I.M.. Complex Patterns of Antarctic Ice Sheet Mass Change Resolved by Time-Dependent Rate Modeling of GRACE and GRACE Follow-On Observations[J],2021,48(1).
APA	Wang L.,Davis J.L.,&Howat I.M..(2021).Complex Patterns of Antarctic Ice Sheet Mass Change Resolved by Time-Dependent Rate Modeling of GRACE and GRACE Follow-On Observations.Geophysical Research Letters,48(1).
MLA	Wang L.,et al."Complex Patterns of Antarctic Ice Sheet Mass Change Resolved by Time-Dependent Rate Modeling of GRACE and GRACE Follow-On Observations".Geophysical Research Letters 48.1(2021).