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

地球望远镜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。这些数据被用来成像地球的电导率，并对地球内部的组成和物理化学状态产生新的见解。大地电磁仪器正被部署在永久地点，仪器也被用于流动观测。移动式阵列(TA)的20个大地电磁系统每个都在美国各地部署1个月，在确定的感兴趣区域进行大约70公里的空间采样。资金将部署的规模限制在每年约60个站点。这项提案要求提供资金，支持与会者在IRIS年度讲习班(2008年6月4日至6日)之前为20名地球范围的科学家参加一个短期(1天)的讲习班，以审议2009年及以后目标领域的建议。对目标的关键考虑将基于社区的需要，以及电导率与地震速度和衰减的联合解释的适用性，以提供对成分和物理化学状态的更好约束。

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.