| 项目编号: | 1520872
|
| 项目名称: | Mapping the Middle of the Mantle-Core Dynamic |
| 作者: | Michael Wysession
|
| 承担单位: | Washington University
|
| 批准年: | 2014
|
| 开始日期: | 2015-09-01
|
| 结束日期: | 2018-08-31
|
| 资助金额: | USD374999
|
| 资助来源: | US-NSF
|
| 项目类别: | Continuing grant
|
| 国家: | US
|
| 语种: | 英语
|
| 特色学科分类: | Geosciences - Earth Sciences
|
| 英文关键词: | mantle
; core
; much heat
; mantle convection system
; mantle plume generation
; core magneto-geodynamo
; dynamic role
; earth?s core
; post-subduction mantle lithosphere
; core mantle boundary region
; core-diffracted p
; lowermost mantle
; hotspot mantle plume
|
| 英文摘要: | The PI proposes to provide the seismological information about the lowermost mantle that will allow him to quantify how much heat is flowing out of Earth?s core and into the mantle. The flow of heat determines how a planet behaves over time. This includes driving plate tectonics, generating hotspot mantle plumes, creating earthquakes and volcanoes, and cycling water through subduction zones. Though we can measure how much heat flows out of Earth and into space (at a rate of 46 terawatts), we still do not know how much heat is generated by radioactivity within the crust and mantle and how much passes into the mantle from the core. This project will help (combined with the research of mineral physicists) to compute the heat coming out of the core, which will, as a result, also constrain how much heat is generated within the earth by radioactivity.
The PI proposes to carry out an investigation of the vertical velocity structure of the base of the mantle using synthetic seismogram modeling of 30+ years of global seismic data of core-diffracted P and S waves (Pdiff, Sdiff). These investigations will allow for calculations of the total and regional heat flow rates from the core into the mantle and provide foundations for the answers to major questions about the geodynamics of the mantle, including the power for the mantle convection system, the residence time of post-subduction mantle lithosphere at the base of the mantle, the power for the core magneto-geodynamo, mantle plume generation, and the dynamic role of large low-shear-velocity provinces within the thermal boundary layer structure of the core mantle boundary region. Our work will also involve the development of educational materials and curricula through partnerships with science centers, schools, and textbook companies. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93526
|
| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
|
|
There are no files associated with this item.
|
| Recommended Citation: | |
Michael Wysession. Mapping the Middle of the Mantle-Core Dynamic. 2014-01-01.
|
|
|