| DOI: | 10.1002/grl.50785
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| 论文题名: | Tsunami speed variations in density-stratified compressible global oceans |
| 作者: | Watada S.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8751
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| EISSN: | 1944-8482
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| 出版年: | 2013
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| 卷: | 40, 期:15 | | 起始页码: | 4001
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| 结束页码: | 4006
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| 语种: | 英语
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| 英文关键词: | compressible ocean
; propagator method
; stratified ocean
; tsunami speed
; tsunami traveltime delay
; World Ocean Atlas
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| Scopus关键词: | compressible ocean
; Propagator method
; Stratified ocean
; Travel-time
; World Ocean
; Elasticity
; Incompressible flow
; Oceanography
; Seawater effects
; Speed
; Ultrasonic velocity measurement
; Tsunamis
; compressibility
; deep sea
; elastic wave
; elasticity
; global ocean
; hydrostatics
; seawater
; sound velocity
; stratification
; travel time
; tsunami
; Mediterranean Sea
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| 英文摘要: | Tsunami speed variations in the deep ocean caused by seawater density stratification is investigated using a newly developed propagator matrix method that is applicable to seawater with depth-variable sound speeds and density gradients. For a 4 km deep ocean, the total tsunami speed reduction is 0.44% compared with incompressible homogeneous seawater; two thirds of the reduction is due to elastic energy stored in the water and one third is due to water density stratification mainly by hydrostatic compression. Tsunami speeds are computed for global ocean density and sound speed profiles, and characteristic structures are discussed. Tsunami speed reductions are proportional to ocean depth with small variations, except in warm Mediterranean seas. The impacts of seawater compressibility and the elasticity effect of the solid earth on tsunami traveltime should be included for precise modeling of transoceanic tsunamis. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881267316&doi=10.1002%2fgrl.50785&partnerID=40&md5=54bae008cf5d2916712c251d60909c42
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6015
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
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| Recommended Citation: | |
Watada S.. Tsunami speed variations in density-stratified compressible global oceans[J]. Geophysical Research Letters,2013-01-01,40(15).
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