Surface Wave Polarization and Global Upper Mantle Structure

表面波偏振和全球上地幔结构

• 批准号: 9304194
• 负责人: T. Guy Masters
• 金额: $ 4.93万
• 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: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304194&HistoricalAwards=false
• 关键词: Surface; Wave; Polarization; Global; Upper

This research is to improve surface-wave dispersion maps using both dispersion and polarization data measured from long-period (greater than 100 seconds) 3-component recordings from the various global networks. Surface wave dispersion maps provide important constraints on global models of shear-wave velocity structure. The current generation of surface-wave dispersion maps show significant differences from author to author and the additional constraint of polarization data, interpretated within a ray-theoretical framework, provides sensitivity to higher-order structure. In order to validate the procedures and assess the importance of large-scale anisotropy, the work will include application of the measurement and interpretation techniques to coupled-mode synthetic seismograms.

这项研究是为了利用从各种全球网络的长周期(大于100秒)三分量记录中测量的频散和偏振数据来改进面波频散图。面波频散图为横波速度结构的全球模型提供了重要的约束条件。当前一代面波频散图显示出不同作者之间的显著差异，在射线理论框架内解释的偏振数据的附加约束提供了对高阶结构的敏感性。为了验证这些程序并评估大尺度各向异性的重要性，这项工作将包括将测量和解释技术应用于耦合模式合成地震记录。