气候变化领域集成服务门户(CCPortal): Novel Quantification of Shallow Sediment Compaction by GPS Interferometric Reflectometry and Implications for Flood Susceptibility

CCPortal

DOI	10.1029/2020GL087807
	Novel Quantification of Shallow Sediment Compaction by GPS Interferometric Reflectometry and Implications for Flood Susceptibility
	Karegar M.A.; Larson K.M.; Kusche J.; Dixon T.H.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:14
英文摘要	Estimates of flood susceptibility and land loss in the world's coastal regions depend on our knowledge of sea level rise (SLR) from increases in ocean mass and volume, as well as knowledge of vertical land motion. Conventional approaches to the latter include tide-gauge and Global Positioning System (GPS) measurements relative to well-anchored monuments few meters below the surface. However, in regions of rapid Holocene sedimentation, compaction of this material can add a significant component to the surface lowering. Unfortunately, this process has been difficult to quantify, especially for the shallowest material above the monument. Here we use a new technique, GPS interferometric reflectometry, to estimate the rate of this process in the Mississippi Delta and the eastern margin of the North Sea. We show that the rate of shallow compaction is comparable to or larger than the rate of global SLR, adding 35% and 65%, respectively, to the rate of relative SLR by 2100. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Compaction; Floods; Interferometry; Reflection; Reflectometers; Sea level; Tide gages; Coastal regions; Conventional approach; Mississippi delta; Reflectometry; Sea level rise; Surface lowering; Tide gauges; Vertical land motions; Global positioning system; coastal zone; compaction; flood; GPS; Holocene; quantitative analysis; reflectometry; satellite laser ranging; sea level change; Atlantic Ocean; Louisiana; Mississippi Delta; North Sea; United States
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/170095
作者单位	Institute of Geodesy and Geoinformation, University of Bonn, Bonn, Germany; Department of Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO, United States; School of Geosciences, University of South Florida, Tampa, FL, United States
推荐引用方式 GB/T 7714	Karegar M.A.,Larson K.M.,Kusche J.,et al. Novel Quantification of Shallow Sediment Compaction by GPS Interferometric Reflectometry and Implications for Flood Susceptibility[J],2020,47(14).
APA	Karegar M.A.,Larson K.M.,Kusche J.,&Dixon T.H..(2020).Novel Quantification of Shallow Sediment Compaction by GPS Interferometric Reflectometry and Implications for Flood Susceptibility.Geophysical Research Letters,47(14).
MLA	Karegar M.A.,et al."Novel Quantification of Shallow Sediment Compaction by GPS Interferometric Reflectometry and Implications for Flood Susceptibility".Geophysical Research Letters 47.14(2020).