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
Vic – DOM
Vic Dina is an at-sea technician for the University of Santa Barbara’s Carlson Microbial Oceanography Lab collecting their Dissolved Organic Matter (DOM) samples.After the long transit that began this expedition, we have been working on the magic of science as we...
Ruth – CTD
Ruth Moorman is a PhD candidate in Physical Oceanography at the California Institute of Technology (CalTech) in Pasadena, CA. On the ship, she’s one of six CTD watchstanders prepping the CTD rosette for deployment and managing rosette sample collection during...
Marshal – Alkalinity
Marshal Thrasher is a Research Assistant at Dalhousie University in Halifax, NS. He facilitates the measurements of the discrete samples to monitor the ocean carbon system.The systematic measurements of chemical, biological, and physical parameters help to define...
Elisa – Dissolved Oxygen
Elisa Aitoro is a Research Data Analyst II at Scripps Institution of Oceanography in San Diego, CA. She does oxygen analysis and manages GO-SHIP data at-sea and on-shore.GO-SHIP has an assortment of what are considered "Level 1" data parameters, which are of highest...
Vincent – Dissolved Oxygen
Vincent Johnson is an oxygen chemist contracted by Scripps’ Oceanographic Data Facility in San Diego, CA.If there’s one thing I want to express in this blog post, it’s that you don’t have to know exactly what you want to do for the rest of your life as soon as...
Onboard Sampling
Sampling the ocean properties helps calibrate float sensors23 Mar 2024 When float deployments are planned, we try to make sure that they are at stations where CTD casts are also being completed. From these casts, full-depth samples of a variety of ocean properties...
Belmont Bullkelp
Our final float, Belmont Bullkelp has been deployed in the Indian OceanBelmont Bullkelp—Belmont Secondary, Victoria, BC Location: 39° 58' 39.72'' S; 94° 59' 41.28'' E Time: Mon 23 MAR 2024 06:58 UTC Temperature: 16°C, Wind 8 kts N Float Number: 21986 Float Type: Apex...
Abby – pH
Abby Tinari is a pH Analyst on GO-SHIP I08S.My name is Abby Tinari, I am an engineer (undergrad), marine ecologist (masters), and chemical oceanographer (experience). I08S is my 5th long cruise and the 5th GO-SHIP parameter I’ve analyzed. On past cruises I sampled...
Ferruccio
Our sixth float, Ferruccio has been deployed in the Indian OceanFerruccio—Golden Coast Academy; San Buenaventura, CA Location: 45° 50' 43.8'' S; 94° 17' 10.68'' E Time: Mon 20 MAR 2024 10:09 UTC Temperature: 10°C, Wind 15 kts W Float Number: 21848 Float Type: Apex...
Seawolves Explore
Our fifth float, Seawolves Explore has been deployed in the Indian OceanSeawolves Explore—Pacifica Christian High School; Santa Monica, CA Location: 49° 16' 5.88'' S; 91° 16' 8.4'' E Time: Mon 18 MAR 2024 14:04 UTC Temperature: 9.0°C, Wind 23 kts N Float Number: 21865...
Southern Ocean
Although our day-to-day view is often the same, there are still some delights to be seen in the Southern Ocean16 March 2024 Heading through the Southern Ocean to Antarctica is a once-in-a-lifetime opportunity for many, but how does it live up to the expectation?...
Swampii
Our fourth float, Swampii has been deployed in the Southern OceanSwampii— Maritime High School; Des Moines, WA Location: 53° 30' 42.84'' S; 87° 2' 26.88'' E Time: Sat 16 MAR 2024 12:30 UTC Temperature: 3.0°C, Wind 22 kts SW Float Number: 21960 Float Type: Apex Float...