2024 GO-SHIP I08S
Decadal re-occupation the 95E meridional line in the southeastern sector of the Southern Ocean aboard the R/V Thomas G. Thompson
The U.S. Global Ocean Ship-based Hydrographic Investigations Program (U.S. GO-SHIP) is part of the international GO-SHIP program, which carries out a systematic and global re-occupation of select hydrographic sections.The I08S line crosses the Indian Ocean and was previously sampled in 1994, 2003, 2007, and 2016. This year, the ship will transit south to the Antarctic shelf and ice edge and then occupy stations on its northward journey.
The specific goals of this cruise are as follows:
- Re-occupation of the historic stations in this line, including as far South as possible. Roughly 84 stations, sampling water from a CTD rosette from near the surface to just off the seafloor
- A second cast dedicated to biological measurements at select stations throughout the line
- Deployment of 4 SOCCOM and 3 GO-BGC biogeochemical floats that measure biogeochemical properties like chlorophyll, nitrate, and oxygen in addition to temperature and salinity
- Deployment of up to 9 core Argo floats and 1 deep Argo float
- Deployment of 10 drifters in support of NOAA’s Global Drifter Program
Stations are spaced at 30 nautical miles (closer at boundaries and over bathymetric features), with one deployment per station of a CTDO/rosette system with 36 10-liter bottles and LADCP. The ship’s standard underway systems (including meteorology, surface seawater T/S/O2/pCO2/etc., centerline depth to bottom, navigation, hull-mounted ADCP, etc.) are also used. Program water column measurements include CTDO, salinity, oxygen, nutrients, CFCs, ocean carbon parameters, and various tracers.
Please join along on the journey by following the expedition blog!
Chief Scientist: Sebastien Bigorre
Co-chief scientist: Katelyn Schockman
Ship: R/V Thomas G Thompson
Departs Fremantle, Australia February 21, 2024
Arrives Fremantle, Australia April 1, 2024
2024 GO-SHIP I08S Expedition Logs
Cora – pH
Cora is a laboratory technician in the Ocean Acidification Research Laboratory at the Alutiiq Pride Marine Institute in Seward, AlaskaFrom an early age, I knew I wanted to be a marine scientist. Growing up, I pictured myself nursing wounded marine mammals back to...
Fishstick!
Our third float, Fishstick! has been deployed in the Southern OceanFishstick!— Salinas High School; Salinas, CA Location: 56° 29' 20.04'' S; 83° 46' 34.68'' E Time: Tue 12 MAR 2024 12:45 UTC Temperature: 3.0°C, Wind 20 kts NW Float Number: 21905 Float Type: Apex Float...
Jess – Salts
Jessica McLaughlin is an R&D Engineer II specializing in Salinity Analysis & Rosette Support.My degree is in Ocean Engineering, more focused on underwater vehicles and robotics, but now I get to work in a walk-in fridge on a boat in the middle of the Southern...
Raphael
Our second float, “Raphael,” has been deployed in the Southern OceanRaphael— Salinas High School; Salinas, CA Location: 64° 28' 17.4'' S; 80° 2' 12.12'' E Time: Wed 06 MAR 2024 10:54 UTC Temperature: -0.9°C, Wind 20 kts SW Float Number: 21499 Float Type: Apex Float...
Nurse Jennie
Our onboard nurse maintains the health of the crew and science party and responds to any medical emergencies or health concerns aboard the ship.I originally started my maritime career working on ocean going tugboats. I was a deckhand and able sailor (AB) on tugs that...
Weekly Update #1
The Trudging Forties28 February 2024 Mobilization Mobilization (loading and unloading) for I08S cruise occurred from Feb 17 to 21 at the Australian Marine Complex where R/V Thomas G Thompson was berthed, just south of Fremantle, Western Australia. Most of the science...
Trieste
Our first float, Trieste, has been deployed in the Indian OceanTrieste—NAS Ocean Studies Board, Washington, DC Location: 87° 20' 43.08'' E; 54° 56' 15.72'' S Time: Fri 01 MAR 2024 02:18 UTC Temperature: 3.4°C, Wind 31 kts W Float Number: 20075 Float Type: Apex Float...
Alphabet Soup
Who's who in the soup of acronyms26 February 2024 It’s true that science seems to be a sea of acronyms. Components, equipment, programs, agencies…everything is referred to by a shorter title, usually the letters that stand in for the longer name. I will try to define...
Float Checks
Making sure it’s “All Systems Go” before we head out20 February 2024 Before the floats can be deployed, the engineers need to ensure that all systems are operating properly, since they will have no access to them for the 5- to 7-year life of the floats. The BGC floats...
I08S Intro
Introducing Jennifer Magnusson—onboard outreach coordinatorHere I Go Again! My name is Jennifer Magnusson and I am so excited to be heading out again with the SOCCOM/GO-BGC Adopt-a-float program! This time, I will be spending 41 days at sea on the R/V Thomas G....