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DOI | 10.1002/2017GL076451 |
Constraints on Transient Viscoelastic Rheology of the Asthenosphere From Seasonal Deformation | |
Chanard, Kristel1,2,3; Fleitout, Luce2; Calais, Eric2; Barbot, Sylvain4; Avouac, Jean-Philippe3 | |
2018-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:5页码:2328-2338 |
文章类型 | Article |
语种 | 英语 |
国家 | France; USA |
英文摘要 | We discuss the constraints on short-term asthenospheric viscosity provided by seasonal deformation of the Earth. We use data from 195 globally distributed continuous Global Navigation Satellite System stations. Surface loading is derived from the Gravity Recovery and Climate Experiment and used as an input to predict geodetic displacements. We compute Green's functions for surface displacements for a purely elastic spherical reference Earth model and for viscoelastic Earth models. We show that a range of transient viscoelastic rheologies derived to explain the early phase of postseismic deformation may induce a detectable effect on the phase and amplitude of horizontal displacements induced by seasonal loading at long wavelengths (1,300-4,000 km). By comparing predicted and observed seasonal horizontal motion, we conclude that transient asthenospheric viscosity cannot be lower than 5 x 10(17) Pa.s, suggesting that low values of transient asthenospheric viscosities reported in some postseismic studies cannot hold for the seasonal deformation global average. |
英文关键词 | viscoelastic loading asthenosphere transient viscosity postseismic seasonal |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428402400024 |
WOS关键词 | SUMATRA-ANDAMAN EARTHQUAKE ; POSTSEISMIC DEFORMATION ; UPPER-MANTLE ; LOWER CRUST ; CONTINENTAL WATER ; TIBETAN PLATEAU ; MOJAVE-DESERT ; CREEP ; GRACE ; RELAXATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27954 |
专题 | 气候变化 |
作者单位 | 1.Univ Paris Diderot, Sorbonne Paris Cite, ENSG, LASTIG LAREG,IGN, Paris, France; 2.PSL Res Univ, CNRS, Ecole Normale Super, Lab Geol,UMR 8538, Paris, France; 3.CALTECH, Div Earth & Planetary Sci, Pasadena, CA 91125 USA; 4.Univ Southern Calif, Dept Earth Sci, Los Angeles, CA USA |
推荐引用方式 GB/T 7714 | Chanard, Kristel,Fleitout, Luce,Calais, Eric,et al. Constraints on Transient Viscoelastic Rheology of the Asthenosphere From Seasonal Deformation[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(5):2328-2338. |
APA | Chanard, Kristel,Fleitout, Luce,Calais, Eric,Barbot, Sylvain,&Avouac, Jean-Philippe.(2018).Constraints on Transient Viscoelastic Rheology of the Asthenosphere From Seasonal Deformation.GEOPHYSICAL RESEARCH LETTERS,45(5),2328-2338. |
MLA | Chanard, Kristel,et al."Constraints on Transient Viscoelastic Rheology of the Asthenosphere From Seasonal Deformation".GEOPHYSICAL RESEARCH LETTERS 45.5(2018):2328-2338. |
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