The overarching goal of these Spray underwater glider missions was to observe the wake caused by the North Equatorial Current flowing westward past the northern tip of Palau. A specific accomplishment was to quantify the vorticity in wake eddies.

FEB 2014 - JAN 2018

Temperature, Salinity, Chlorophyll Fluorescence, Doppler Velocity, Acoustic Backscatter, Depth-Averaged Velocity

  • Region: Western North Pacific
  • PI: Daniel Rudnick
  • Funded by: Office of Naval Research

Project Dataset Files

Cleaned, post-processed and vertically binned to meet user needs

Access Options

Data are available in CF compliant NetCDF files and are also available via our ERDDAP server which offers additional file types, data subsetting, visualization options and more.


FEB 2014 - JAN 2018

Project Dataset Processing

  • Averaged to 10-m vertical bins
  • Bins improve ease of use
  • Bins allow for easy integration of ADCP acoustic backscatter and velocity data
  • Filtered using QC flags
  • Only high-quality data are represented in each bin

How to Cite

When using this dataset, please cite the data as:

Rudnick, D. (2020). Glider observations of circulation near abrupt topography [Data set]. Scripps Institution of Oceanography, Instrument Development Group. doi: 10.21238/S8SPRAY8135


Johnston, T. M. S. and D. L. Rudnick, 2022: Stirring and mixing in the wake of Velasco Reef, Palau. Journal of Geophysical Research-Oceans; doi: 10.1029/2022JC018745
Zeiden, K. L., D. L. Rudnick, J. A. MacKinnon, V. Hormann, and L. Centurioni, 2022: Vorticity in the wake of Palau from Lagrangian surface drifters. Journal of Physical Oceanography; doi: 10.1175/JPO-D-21-0252.1
Andres, M., R. C. Musgrave, D. L. Rudnick, K. L. Zeiden, T. Peacock, and J.-H. Park, 2020: On the predictability of sea surface height around Palau. Journal of Physical Oceanography; doi: 10.1175/JPO-D-19-0310.1
Johnston, T. M. S., M. C. Schönau, T. Paluszkiewicz, J. A. MacKinnon, B. K. Arbic, P. L. Colin, M. H. Alford, M. Andres, L. Centurioni, H. C. Graber, K. R. Helfrich, V. Hormann, P. F. J. Lermusiaux, R. C. Musgrave, B. S. Powell, B. Qiu, D. L. Rudnick, H. L. Simmons, L. St. Laurent, E. J. Terrill, D. S. Trossman, G. Voet, H. W. Wijesekera, and K. L. Zeiden, 2019: FLEAT: A Multiscale Observational and Modeling Program to Understand How Topography Affects Flows in the Western North Pacific. Oceanography, 32, 10-21, doi: 10.5670/oceanog.2019.407; doi: 10.5670/oceanog.2019.407
Zedler, S. E., B. S. Powell, B. Qiu, and D. L. Rudnick, 2019: Energy Transfer in the Western Tropical Pacific. Oceanography, 32, 136-145, doi: 10.5670/oceanog.2019.419; doi: 10.5670/oceanog.2019.419
Rudnick, D. L., K. L. Zeiden, C. Y. Ou, T. M. S. Johnston, J. A. MacKinnon, M. H. Alford, and G. Voet, 2019: Understanding vorticity caused by flow passing an island. Oceanography, 32, 66-73, doi: 10.5670/oceanog.2019.412; doi: 10.5670/oceanog.2019.412
Andres, M., M. Siegelman, V. Hormann, R. C. Musgrave, S. T. Merrifield, D. L. Rudnick, M. A. Merrifield, M. H. Alford, G. Voet, H. W. Wijesekera, J. A. MacKinnon, L. Centurioni, J. D. Nash, and E. J. Terrill, 2019: Eddies, Topography, and the Abyssal Flow by the Kyushu-Palau Ridge Near Velasco Reef. Oceanography, 32, 46-55, doi: 10.5670/oceanog.2019.410; doi: 10.5670/oceanog.2019.410
Schönau, M. C., H. W. Wijesekera, W. J. Teague, P. L. Colin, G. Gopalakrishnan, D. L. Rudnick, B. D. Cornuelle, Z. R. Hallock, and D. W. Wang, 2019: The End of an El Niño: A View from Palau. Oceanography, 32, 32-45, doi: 10.5670/oceanog.2019.409; doi: 10.5670/oceanog.2019.409
Zeiden, K. L., D. L. Rudnick, and J. A. MacKinnon, 2019: Glider observations of a mesoscale oceanic island wake. Journal of Physical Oceanography; doi: 10.1175/JPO-D-18-0233.1
Rudnick, D. L., Sherman, J. T., & Wu, A. P. (2018). Depth-average velocity from Spray underwater gliders. Journal of Atmospheric and Oceanic Technology, (2018), 35, 1665-1673; doi: 10.1175/JTECH-D-17-0200.1