气候变化领域集成服务门户(CCPortal): Is High Topography Around the North Atlantic Supported From the Upper Mantle?

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DOI	10.1029/2020JB019808
	Is High Topography Around the North Atlantic Supported From the Upper Mantle?
	Hejrani B.; Balling N.; Jacobsen B.H.; Nielsen S.B.
发表日期	2020
ISSN	21699313
卷号	125 期号:9
英文摘要	The traveltime residuals of 393 receiver sites with more than 21,000 P wave and 9,700 S wave arrivals are used to investigate the upper-mantle P and S wave velocity structure down to the depth of 500 km beneath the regions of high topography of the North Atlantic Caledonian crust. In east Greenland, we observe high-velocity anomalies beneath high topography. In northern Norway and Sweden, a stable thick lithosphere beneath both the high topography and the Baltic shield exists. Only southern Norway exhibits a weak correlation between high topography and low-velocity anomalies of P and S waves. Consequently, the correlation of topography versus average relative traveltime residuals in four regions of proposed Cenozoic epeirogenic uplift reveals positive correlation only in southern Norway and negative or absence of correlation in other regions. These results show that high topography does not correlate with the inferred velocity structure of the upper mantle in the North Atlantic realm. Consequently, our findings weaken the hypothesis of dynamic topography and epeirogenic uplift of the Atlantic margins during the Late Cenozoic. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Caledonian mountains; dynamics of lithosphere and mantle; Greenland; North Atlantic; Northwestern Europe; upper-mantle velocity structure
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187618
作者单位	Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia; Department of Geoscience, Aarhus University, Aarhus, Denmark
推荐引用方式 GB/T 7714	Hejrani B.,Balling N.,Jacobsen B.H.,et al. Is High Topography Around the North Atlantic Supported From the Upper Mantle?[J],2020,125(9).
APA	Hejrani B.,Balling N.,Jacobsen B.H.,&Nielsen S.B..(2020).Is High Topography Around the North Atlantic Supported From the Upper Mantle?.Journal of Geophysical Research: Solid Earth,125(9).
MLA	Hejrani B.,et al."Is High Topography Around the North Atlantic Supported From the Upper Mantle?".Journal of Geophysical Research: Solid Earth 125.9(2020).