Development and Testing of Pressure Gradient Sensors to Improve Shallow Seafloor Seismic Observations

开发和测试压力梯度传感器以改善浅海海底地震观测

• 批准号: 1334746
• 负责人: Spahr Webb
• 金额: $ 20.64万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1334746&HistoricalAwards=false
• 关键词: Development; Testing; Pressure; Gradient; Sensors

The PIs request funding to develop and test on current shielded OBSs orthogonal pairs of horizontal pressure gradient (OPG) sensors. These sensors will be based on the sensor technology originally developed by one of us (Webb) for the differential pressure gauge (DPG) systems currently used on the majority of the US OBS fleet. Theory suggests that these pressure gradient observations should be proportional to the wave deformation loading noise and thus can be used to predict and remove the wave loading noise from the horizontal components. Combining data from a current shielded OBS with data from APG and OPGs sensors may enable broadband seismic observations on the shallow seafloor with noise levels comparable to many land sites greatly improving OBS data for studying the Earth. This project should greatly enhance the capabilities of ocean bottom seismometers deployed in shallow water for studying the seismicity and structure of continental margins crucial to understanding the Earth and the Earth?s seismic hazard.Broader Impacts: This instrument development will be a tremendous asset for future relatively shallow water deployments of broadband instruments as it will improve the quality of the data significantly and will make the horizontal component data really useable for a wide range of structural studies. A significant reduction of noise due to waves would benefit a host of OBS programs planned or anticipated in Cascadia, Alaska, New Zealand and elsewhere. Because all of these regions are potential sites of great earthquakes and tsunamis, there are also high societal benefits in improved OBS data.

PIS请求资金以开发和测试当前的屏蔽观察到水平压力梯度（OPG）传感器的正交对。这些传感器将基于最初由我们中的一个（Webb）开发的传感器技术，用于目前在美国大多数OBS机队中使用的差分压力表（DPG）系统。理论表明，这些压力梯度观测值应与波变形负荷噪声成正比，因此可以用于预测和去除水平成分中的波载噪声。将当前屏蔽的OBS的数据与APG和OPG传感器的数据相结合，可以使宽带地震在浅海地板上观察，噪声水平可与许多许多土地相媲美，从而极大地改善了研究地球的OBS数据。该项目应大大提高部署在浅水中的海洋底部地震仪的能力，以研究大陆边缘的地震性和结构，对于理解地球和地球的地震危险至关重要。公民的影响：这种工具的开发将是巨大的资产，对于未来的宽敞宽敞工具的质量将是一项巨大的资产，并将其构成质量的质量，并将其构成质量，并将其构成。结构研究范围。波浪引起的噪音大大降低将使在卡斯卡迪亚，阿拉斯加，新西兰和其他地方计划或预期的许多OBS计划受益。由于所有这些地区都是大地震和海啸的潜在地点，因此改进的OBS数据也有很高的社会益处。