Gridded bathymetry data (GMT netCDF format) for the Discovery Transform Fault and possible nano-plate

This multibeam gridded bathymetry data set was collected using an EM300 swath sonar system during R/V Thomas Thompson cruise TN214. The primary goal of the cruise was to deploy 40 ocean bottom seismometers (OBS) and 7 seafloor geodesy tripods at the Quebrada/Discovery/Gofar (QDG) transform fault system on the equatorial East Pacific Rise. There were three target survey areas for high-resolution seafloor mapping: the Discovery and Quebrada transform faults, and a potentially rotating nano-plate just north of the Discovery transform fault. The surveys were typically carried out at a survey speed of 5 knots, with a fixed swath width of 4 km (135 beams/ping). The bathymetry was processed using the CARIS Hips&Sips software. The data file is in GMT-compatible netCDF grid format, gridded at a resolution of 75m with no interpolation to fill data gaps, WGS-84. The gridded TN214 bathymetry data is used in the Wolfson-Schwehr et al., 2014 paper. This project was funded by NSF Award 0242117, with Principal Investigators Jeffery McGuire, John Collins, and Robert Detrick.

本多波束网格化水深数据集由EM300条带测深声呐系统采集于R/V Thomas Thompson号科考航次TN214。本次航次的核心目标为在东太平洋海隆赤道段的克布拉达/迪斯科弗里/戈法尔（QDG）转换断层系统部署40台海底地震仪（Ocean Bottom Seismometers, OBS）与7套海底大地测量三脚架。本次高分辨率海底测绘的三个目标勘测区域分别为：迪斯科弗里转换断层、克布拉达转换断层，以及迪斯科弗里转换断层北侧一处疑似旋转纳米板块。勘测作业通常以5节的航速开展，固定条带宽度为4千米（每声呐脉冲发射135条波束）。水深数据采用CARIS Hips&Sips软件进行处理。数据文件采用兼容GMT的netCDF网格格式，网格分辨率为75米，未进行插值以填补数据空白，坐标系采用WGS-84。本网格化TN214水深数据集已应用于Wolfson-Schwehr等人2014年发表的学术论文中。本项目由美国国家科学基金会（NSF）项目编号0242117资助，首席研究员为Jeffery McGuire、John Collins与Robert Detrick。