Collaborative Research: Developing A Prototype Drifter to Measure the Oceanic Geomagnetic Field

国际和平研究所要求提供资金，以建造一个廉价的磁漂移器，该磁浮器可以很好地用于典型的、受假设驱动的研究特定地区的NSF项目。他们设想了一种数据收集模式，调查人员在他们希望用磁场数据研究的区域上游释放一支廉价的水面漂浮者船队。漂流者经过研究地点，收集所需的数据。可以获得这些相对小、低功率和廉价的磁传感器，并将其与漂移器内的电路组合或集成。由于漂流者移动缓慢，磁力计可以设置为不频繁地读取地磁场，从而保持较低的数据率。来自海洋的磁场数据对于了解海洋盆地的起源、演化和结构至关重要。海洋磁条异常不仅记录了地球-S磁场的极性反转，而且构成了地磁极性时间尺度的基础，并被用来重建洋盆的历史。这些异常最好的解决办法是测量海面的磁力。卫星磁测量虽然是全球性的，但缺乏横向分辨率，无法详细解决这些磁条异常问题。虽然我们对大多数大洋流域都有实用的知识，但也有一些区域，如南大洋，只有稀少的航迹覆盖。在最近对世界数字磁异常地图(WDMAM，Purucker，2007年)进行的全球汇编中，现有数据如此稀少，以至于磁异常模型被用来帮助插入数据。Shiptime价格昂贵，在不久的将来，在偏远地区覆盖全球是不可行的。我们认为，解决方案是使用物理海洋学社区使用的经过验证的海洋漂浮物和浮游物技术，并在这些漂浮物上安装小型、低功率、廉价的磁强计传感器，以覆盖目前采样不足的海洋区域。更广泛的影响：提案中强调的主要更广泛的影响似乎主要是博士后的高级培训；并可能涉及暑期本科生。显然，以船舶时间的一小部分成本收集急需的地磁数据的能力将在地球科学界产生广泛的影响。该提案将支持一名女性博士后研究员。获得的数据将被许多其他研究人员使用，并在整个构造界产生广泛影响。

The PI's request funding to build an inexpensive magnetic drifter that works well for a typical, hypothesis-driven NSF project that studies a specific region. They envision a mode of data collection where investigators release a flotilla of inexpensive surface drifters upstream of an area they wish to study with magnetic field data. The drifters pass over the study site, collecting the desired data. These relatively, small, low power and inexpensive magnetic sensors can be obtained and combined or integrated with the circuitry within the drifter. Because the drifter moves slowly, the magnetometer can be set up to read the geomagnetic field infrequently keeping the data rate low.Magnetic field data from the oceans have been critical for understanding the origin, evolution and structure of the ocean basins. The marine magnetic stripe anomalies not only document Earth?s magnetic field polarity reversals but also form the basis for the Geomagnetic Polarity Timescale and are used to reconstruct the history of the ocean basins. These anomalies are best resolved by sea surface magnetic measurements. Satellite magnetic measurements, while global in extent, lack the lateral resolution to resolve these magnetic stripe anomalies in detail. While we have a working knowledge of most of the ocean basins there are areas, such as the southern ocean, that have only sparse shiptrack coverage. In a recent global compilation for the World Digital Magnetic Anomaly Map (WDMAM, Purucker, 2007) the available data was so sparse that a model of magnetic anomalies was used to help interpolate data. Shiptime is expensive and global coverage in remote areas is simply not feasible in the near future. The solution we believe is to use the proven technology of ocean drifters and floats used by the physical oceanographic community and mount small, low power, inexpensive magnetometer sensors to these drifters to cover areas of the ocean that are undersampled at present. Broader Impacts: The main broader impact emphasized in the proposal seems mainly the advanced training of a post-doc; and potentially involving a summer undergraduate student. Clearly the ability to collect much-needed geomagnetic data at a fraction of the cost of ship time would have broad impacts in the geosciences community. The proposal will support a female postdoctoral fellow. Data obtained will be used by many other researchers and have a broad impact throughout the tectonics community.