This data set was acquired with a Reson SeaBat 7125 Multibeam Sonar on AUV Sentry during R/V Melville expedition MV1205 conducted in 2012 (Chief Scientist: Dr. Donna Blackman). These data files are of NetCDF Grid format and include Bathymetry data that were processed after acquisition.

This data set was acquired with a Navigation System on AUV Sentry during R/V Melville expedition MV1205 conducted in 2012 (Chief Scientist: Dr. Donna Blackman). These data files are of NDSF PPL Text File (ASCII) format and include Navigation data that were processed after acquisition. Columns are date, time, vehicle name, latitude(decimal deg), longitude(decimal deg), depth (m), heading(decimal deg), pitch(decimal deg), roll(decimal deg).

This data set was acquired with a Seapoint Sensors, Inc. Optical Backscatter Sensor, Navigation System, Sea-Bird Electronics SBE-49 FastCAT CTD, 1540 Magnetometer and Aanderaa Data Instruments 4330 Oxygen Optode Sensor on AUV Sentry during R/V Melville expedition MV1205 conducted in 2012 (Chief Scientist: Dr. Donna Blackman). These data files are of NDSF SCC Text File (ASCII) format and include Magnetic Field, Navigation, Optical Backscatter, Oxygen and Temperature data that were processed after acquisition and sampled at 1Hz.

Residual mantle Bouguer anomaly grid calculated for the Ohana project located 25-30.5°N, 145.5-137.5°W in the NE Pacific. This ~500x600 km area was the site of an Ocean Bottom Seismometer array deployed Nov 2021-Feb 2023 by a team led by Gabi Laske. Donna Blackman led the bathymetric and gravity analyses. Gravity data processing started with the satellite-based Free Air Anomaly grid (grav_32.1.nc, Sandwell et al., 2014). The contributions of seafloor topography (from the corresponding bathymetry grid called Ohana_bathymetry_200m_v5n.grd), and of a constant thickness (6 km) crust were removed assuming 1700, 250, and 350 kg/m3 density contrasts at the seafloor, upper/lower crust (1.5 km depth), and basal interfaces, respectively. The best-fit exponential age trend of the predicted mantle Bouguer anomaly was removed as an estimate of the contribution of plate cooling for this 40-52 Ma area. The resultant RMBA data was gridded at 200 m. The RMBA data file is in GMT-compatible netCDF grid format.

Bathymetry grid produced as an add-on to the Ohana project. This grid covers 30.5-32.5°N, 134.5-132 °W in the NE Pacific which is to the east of the main Ohana project area. This smaller eastern area was mapped during R/V Sally Ride cruise SR2302 following Ocean Bottom Seismometer array recovery in February 2023 by a team led by Gabi Laske. Donna Blackman led the bathymetry processing and Su Talavera-Soza and Ruei-jiun Hung contributed. Detailed processing for cruise SR2302 was done manually with MB-System mbedit. Hull-mounted multibeam bathymetry data from 5 additional cruises available at NCEI as of January 2023 were compiled with the processed SR2302 multibeam data. All data were gridded at 200 m using mbgrid. The data file is in GMT-compatible netCDF grid format.

Bathymetry grid produced for the Ohana project located 25-30.5°N, 145.5-137.5°W in the NE Pacific. This ~500x600 km area was the site of an Ocean Bottom Seismometer array deployed Nov 2021-Feb 2023 by a team led by Gabi Laske. Donna Blackman led the bathymetry processing. Hull-mounted multibeam bathymetry data from 36 cruises available at NCEI by January 2023 were compiled, processed where necessary, and gridded at 200 m spacing. All files were first processed with MB-System using this command: mbclean -I(filelist) -F-1 -S1 -C1 -Z -B1000/6250. Further manual processing to remove outliers with mbedit was required for 22 of the cruises. Detailed processing with mbclean and mbedit was done for cruises KM2117 and SR2302, with Su Talavera-Soza and Ruei-jiun Hung contributing to the processing during the SR2302 cruise. All swath data were gridded using mbgrid. The data file is in GMT-compatible netCDF grid format.

This data set was acquired with a ship-based Atlas Hydrosweep DS2 Multibeam Sonar system during Maurice Ewing expedition EW0112 conducted in 2001 (Chief Scientist: Dr. Donna Blackman). These data files are of MBSystem Compatible format and include Sidescan, Acoustic Backscatter, and Swath Bathymetry data that have not been processed. Data were acquired as part of the project(s): Acoustic Testing in the Indian Ocean.

This data set was acquired with a Navigation system on the towed Argo-II system during Atlantis expedition AT03-60 conducted in 2000 (Chief Scientist: Dr. Donna Blackman; Investigator(s): John A. Greene, Dr. Masako Tominaga, and Dr. Donna Blackman). These data files are of Text File (ASCII) format and include Navigation data that were processed after acquisition. Data were acquired as part of the project(s): Near-Bottom Geological and Geophysical Investigation of an Ocean Core Complex: Eastern Atlantis Ridge-Transform Intersection Massif. This data was cited by Greene et al., 2015.

This data set was acquired with the towed WHOI DSL-120 Sidescan Sonar during Atlantis expedition AT03-60 conducted in 2000 (Chief Scientist: Dr. Donna Blackman; Investigator(s): Dr. Donna Blackman and Dr. Deborah Kelley). These data files are of NetCDF Grid format and include Sidescan data that were processed after data collection. Data were acquired as part of the project(s): Near-Bottom Geological and Geophysical Investigation of an Ocean Core Complex: Eastern Atlantis Ridge-Transform Intersection Massif.

This data set was acquired with a ship-based Navigation system during Melville expedition VANC10MV conducted in 2003 (Chief Scientist: Dr. Donna Blackman). These data files are of Text File (ASCII) format and include Navigation data and were processed after data collection. Funding was provided by NSF grant(s): OCE02-21063.