Collaborative Research: Global Conductivity by Spatiotemporal Analysis

合作研究：时空分析的全球电导率

• 批准号: 0087391
• 负责人: Steven Constable
• 金额: $ 21万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-15 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0087391&HistoricalAwards=false
• 关键词: Collaborative; Research; Global; Conductivity; Spatiotemporal; Collaborative; Research; Global; Conductivity; Spatiotemporal

ConstableEAR-0087391Lateral variations in mantle electrical conductivity provide insight into mantle convection, the fate of subducting slabs, the distribution of mantle plumes, and the nature of the transition zone from upper to lower mantle. Mantle electrical conductivity traditionally has been studied using frequency-domain response functions derived from Fourier analysis of permanent geomagnetic observatory time series. This method is limited however by the sparse and geographically irregular observatory distribution. Magnetic satellites, which record continuous spatiotemporal magnetic fluctuations, offer an opportunity to overcome this limitation since they sample the globe completely. The investigators have proposed to develop a time-domain 3D spherical Earth induction code and use data from the MAGSAT and Oersted satellites to investigate 3D variations in upper mantle electrical conductivity.

地幔电导率的constableAr-0087391侧面变化提供了洞察力对流，俯冲板的命运，地幔羽的分布以及从上层到下层地幔的过渡区的性质。传统上，使用频率域的响应函数研究了地幔电导率，这些响应函数从永久性地磁天文台时间序列的傅立叶分析得出。但是，这种方法受到稀疏和地理不规则的观测值分布的限制。记录连续时空磁波动的磁性卫星为克服这一限制提供了机会，因为它们完全采样了地球。研究人员建议开发一个时间域3D球形地球诱导代码，并使用MAGSAT和OERSTED卫星的数据研究上地幔电导率的3D变化。