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2018 Shelfwide Cruise: July 23 - July 30

Cruise Dedication

The 2018 shelf-wide cruise to determine the extent of low oxygen bottom waters on the Louisiana-Texas continental shelf is dedicated to the memory of Dr. Wesley J. Tunnell, Jr. who passed away on Saturday, July 14, 2018, after a long successful and not successful battle with cancer.

Click here for more information.

Principal Investigators

  • Nancy N. Rabalais, LSU & LUMCON, Principal Investigator, Chief Scientist
  • Gene Turner, LSU, Principal Investigator

Additional Investigators

  • Wendy Morrison (LUMCON), co-chief scientist
  • Andrea Price (LSU), post-doctoral research associate
  • Trevor Meckley (NOAA, NCCOS), NOAA representative
  • Mike Scaboo (Univ Delaware), graduate student, pCO2 and pH re hypoxia
  • Andy Montgomery (Univ Georgia), graduate student, nitrification/denitrification
  • Gina Woods (LUMCON), research assistant
  • Richard Grady, USM student, EPA Gulf of Mexico Program intern
  • Kathleen Doering, EPA Gulf of Mexico Program intern


  • The final dissolved oxygen data will be corrected, as necessary, from linear regression with the Winkler titrations over a range of 0.22 to 8.43 mg/L. Initial observations indicate correction, but the f-factor for the Winkler standard remains to be verified. Any corrected data will be reflected in other derived measurements.
  • Salinity data not yet verified with PortaSal samples.
  • CTD data remain to be post-processed with ALIGN CTD to be applied.
  • Instrumentation was calibrated pre- and post-cruise according to manufacturer's specifications and standard method procedures were applied for several variables, not yet calculated, according to several LUMCON EPA-approved Quality Assurance Project Plans.
  • Data collected as part of process studies remain to be analyzed and synthesized.
  • Final QA/QC'd data will be submitted to NOAA NODC within two years of collection.