Whither the Transportable Magnetotelluric (MT) Array: Proposal for an EarthScope Community Workshop to Prioritize Targets for Transportable MT Deployments

EarthScope正在安装可移动的大地电磁（MT）站，以记录地球的平面波电磁（EM）散射特征。这些数据被用来绘制地球电导率的图像，并对地球内部的组成和物理化学状态产生新的见解。大地电磁仪器正在固定场址部署，仪器也正在用于流动观测。可移动阵列（TA）的20个大地电磁系统每个在美国连续部署1个月，在确定感兴趣的区域进行约70公里的空间采样。资金限制了每年大约60个站点的部署规模。本提案要求资金支持在IRIS年度研讨会（2008年6月4日至6日）之前参加由20名EarthScope科学家参加的为期1天的短期研讨会的参与者，以考虑2009年及以后的目标领域的建议。对目标的关键考虑将基于社区需求，以及电导率与地震速度和衰减联合解释的适用性，以提供更好的成分和物理化学状态约束。

EarthScope is installing transportable magnetotelluric (MT) stations to record the plane-wave electromagnetic (EM) scattering signature of the Earth. These data are used to image the electrical conductivity of the Earth and produce new insights into the composition and physicochemical state of its interior. Magnetotelluric instruments are being deployed at permanent sites, and instruments are being used for mobile observations as well. The 20 magnetotelluric systems of the transportable array (TA) are each deployed for 1-month durations across the contiguous US with a spatial sampling of approximately 70 km in regions of identified interest. Funding limits the size of the deployments to ~60 sites/year. This proposal requests funds to support participants attending a short (1-day) workshop for 20 EarthScope scientists immediately prior to the IRIS Annual Workshop (4-6 June, 2008) to consider suggestions for target areas in 2009 and beyond. The key consideration for targets will be based upon community need, and the applicability of joint interpretation of conductivity with seismic velocity and attenuation to provide better constraints on composition and physicochemical state.