SUVA, October 2 — Australia’s national science agency will lead a four-month research voyage through the Pacific Ocean from late September to mid-December, aiming to close a persistent gap in the global data record on how the ocean is absorbing heat and carbon.
The 94-metre research vessel RV Investigator, operated by the Commonwealth Scientific and Industrial Research Organisation, will sail from Fiji toward the Antarctic ice edge, collecting atmospheric and ocean measurements across some of the smallest and least instrumented states on Earth. The voyage runs from September 27 to December 16, 2026.
Four early-career Pacific researchers, including two from Fiji, will join the crossing under partnership agreements with the Pacific Community and the Partnership for Observation of the Global Ocean. Before departure, the CSIRO and the Australian High Commission held an engagement day in Lautoka, allowing regional science agencies to tour the vessel and review Australia’s marine science capacity.
The route is unusually long. The ship will dock in Fiji and New Zealand and pass through the waters of Tuvalu, Kiribati, the Howland and Baker islands, Tokelau, American Samoa, Niue and New Zealand again, before entering the Southern Ocean and continuing to the Antarctic ice edge. Several of those stops fall within the exclusive economic zones of states whose entire territory sits a few metres above sea level.
Dr Bea Pena-Molino, the CSIRO voyage chief scientist, said the work will “fill critical knowledge gaps” by capturing ocean data for the region. “Using the latest technology, we will be able to compare data to understand how the ocean is both driving and responding to climate change,” she said, adding that the effort covers how the ocean absorbs additional heat and carbon from the atmosphere and how that reshapes marine ecosystems, from plankton to fish.
The western Pacific is among the most climate-sensitive regions on the planet and among the least observed by research vessels, a combination that makes ship-based sampling difficult to replace. Long-term series collected on this crossing will feed into global monitoring and into the adaptation planning of island governments that have little under their own control.
The timing is not incidental. Fiji is hosting the pre-COP meeting from October 5 to 8, gathering Pacific negotiators in the months before the annual climate summit cycle resumes. Ocean observations gathered on this voyage will be handed to the same delegates, who have consistently argued that the countries least responsible for rising temperatures face the most direct consequences.
For Pacific science institutions, the voyage carries a second, less visible return: training. Four early-career researchers from the region will spend nearly four months aboard, a duration long enough to move them from passengers to operators of sampling equipment. Agency officials describe that transfer of skill as the lasting output of the expedition, one that remains after the data have been published and the vessel has returned to port.