Determination of current geoid trends related to deep Earth processes in the South Atlantic region

确定与南大西洋地区地球深层过程相关的当前大地水准面趋势

基本信息

项目摘要

We propose to link inferences of vertical motion in the South Atlantic region over a wide range of time scales, from geologic to geodetic, the latter represented by trend analyses of non-tidal, temporal variations in the gravity field derived from ultra-precise GRACE models. The southern part of Africa, in particular, is uniquely suited for this analysis, being a region with some of the most active mantle related dynamic uplift world-wide, with little contamination from hydrologic variability or other processes.The Institute for Astronomical and Physical Geodesy (IAPG) of TU München and the Geophysics Section of Ludwig-Maximilians-University (GS-LMU) are well positioned for this project, as IAPG has been working on satellite concepts for the high resolution modeling of the gravity field for many decades, and GS-LMU has pioneered high resolution global mantle circulation models capable of inferring past mantle flow and structure through sophisticated fluid inverse theory based on the adjoint method.Key questions we wish to address include:1) Can solid Earth related signals be separated in gravity solutions?2) Over which time periods may one rely on a linear interpolation of solid Earth related gravity trends?3) Is there ongoing vertical motion in the region and how does it relate to Cenozoic uplift pulses that have been inferred for the region from geologic observations?The use of the most sophisticated gravity processing techniques, combined with powerful, high resolution mantle circulation to represent non-linear convection signals will help us to distinguish end-member hypotheses on the effect that mantle convection may have in shaping the regional tectonic evolution, namely a dominance of quasi-steady, lower-mantle related flow or, alternatively, a prominence of pulsating, semi-episodic upper mantle flow.
我们建议将南大西洋地区垂直运动的推断联系起来,在广泛的时间尺度上,从地质到大地测量,后者以非潮汐的趋势分析为代表,重力场的时间变化来自超精确的GRACE模型。非洲南部特别适合进行这一分析,因为它是世界上与地幔有关的一些最活跃的动态抬升区域,几乎没有受到水文变化或其他过程的污染。德国慕尼黑工业大学天文与物理大地测量研究所(IAPG)和德国路德维希-马克西米连斯大学地球物理部(GS-LMU)在这一项目中处于有利地位,因为IAPG几十年来一直致力于重力场高分辨率建模的卫星概念,并且GS-LMU率先建立了高分辨率全球地幔环流模型,能够通过基于伴随方法的复杂流体逆理论推断过去的地幔流动和结构。我们希望解决的关键问题包括:1)与固体地球相关的信号能否在重力解中分离?2)在哪个时间段内可以依赖与固体地球相关的重力趋势的线性插值?3)该地区是否存在持续的垂直运动?它与地质观测推断出的该地区新生代隆升脉冲有何关系?利用最复杂的重力处理技术,结合强大的、高分辨率的地幔环流来表示非线性对流信号,将有助于我们区分关于地幔对流在塑造区域构造演化中可能产生的影响的端元假设,即准稳定的、与下地幔相关的流动占主导地位,或者,脉动的、半幕式的上地幔流动突出。

项目成果

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Professor Dr. Hans-Peter Bunge, Ph.D.其他文献

Professor Dr. Hans-Peter Bunge, Ph.D.的其他文献

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{{ truncateString('Professor Dr. Hans-Peter Bunge, Ph.D.', 18)}}的其他基金

Retrodiction Range of geodynamic earth models from twin experiments that account for model inconsistencies and limited resolution of present-day heterogeneity
来自孪生实验的地球动力学地球模型的回顾范围,解释了模型不一致和当今异质性的有限分辨率
  • 批准号:
    412338397
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Feasibility study to identify deep Earth signals in current and future gravity field missions
在当前和未来重力场任务中识别地球深部信号的可行性研究
  • 批准号:
    323625017
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
TERRA-NEO - Integrated Co-Design of an Exascale Earth Mantle Modeling Framework
TERRA-NEO - 百亿亿次地幔建模框架的集成协同设计
  • 批准号:
    230862710
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Mapping the upper mantle structure beneath the South Atlantic and the adjacent continents using full waveform tomography with geodynamic interpretations of hotspot flux and material transport in the asthenosphere.
使用全波形断层扫描绘制南大西洋和邻近大陆下方的上地幔结构图,并对软流圈中的热点通量和物质传输进行地球动力学解释。
  • 批准号:
    172686521
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Seismic waveform tomography on continental scales based on the spectral-element and adjoint methods
基于谱元和伴随方法的大陆尺度地震波形层析成像
  • 批准号:
    73582572
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Program management and scientific networking
项目管理和科学网络
  • 批准号:
    80299618
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Mineralogical and Dynamic Origin of the South African Superplume
南非超羽流的矿物学和动态起源
  • 批准号:
    79644183
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Exploring plate tectonic force balances and plate boundary forces in the South Atlantic from plate motion histories and coupled global and regional geodynamic models
从板块运动历史和耦合的全球和区域地球动力学模型探索南大西洋的板块构造力平衡和板块边界力
  • 批准号:
    80283908
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Geodynamic models with thermodynamically self-consistent mineral physics
具有热力学自洽矿物物理的地球动力学模型
  • 批准号:
    41509765
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Forward modelling of mantle density anomalies from geodynamic considerations
从地球动力学角度考虑地幔密度异常的正演模型
  • 批准号:
    30265607
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes

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循环二氧化碳水平升高导致延迟钠电流增加的致心律失常作用及其发生机制的研究
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