Gulf of Mexico hydrographic data: CTD data and bottle data from R -V Gyre Cruise 91G-04 and CTD data from R/V Powell Cruise 91P-03

R/V Gyre cruise 91G-04 was a 5-day basic research cruise (14-18 June), which made a line of hydrographic stations along 95W that extended from the inner continental shelf off Galveston to the upper continental slope. It combined a day of TAMU-supported graduate student Training and Research with 4 days of NSF-sponsored research in support of OCE-9012103: 'Physiochemical processes controlling thorium behavior in the ocean' (P. Santschi, PI). CTD-resette multisampler casts were made at 9 stations along 95W, as well as at a tenth site east of 95W and north of 29N, close off the entrance to Galveston Bay. At four of the CTD stations, radionuclide were sampled using a 6-cartridge Multiple In site Pumping System (MIPS). R/V Powell cruise 91P-03 was a 7-day applied research cruise (7-13 June), which carried out piston-coring and vibracoring work sponsored by the TAMU Geochemical and Environmental Research Group (GERG). Jerry Morgan served as Chief Scientist, and Marine Technician Greg Warr participated to piggy-back CTD casts with an internal-recording Seabird 'Seacat' profiler at five coring sites that were located west of 96W, as well as at a sixth location that was sited SSW of Galveston, Texas. [Contract DI-14-35-0001-300501]. (DBO)