SUBSEA Part 1

The subtropical ocean gyres are thousands of kilometers in diameter, with an average depth exceeding 4,000 meters, making them one of Earth’s largest continuous biomes. Gyres are large, permanent circular current systems primarily driven by Earth’s global wind patterns and its rotation, and are found in each major ocean basin. While often deprived of nutrients, it is estimated that 20% of the ocean’s primary productivity occurs in the subtropical gyres, and these ecosystems may account for up to half of the global ocean carbon export to the deep sea. Understanding their biogeochemistry is required to develop a more accurate understanding of how climate change is impacting the global Ocean. 

Animals as Living Bioreactors PART 1

19 January - 22 February 2026 #LivingBioreactors Each night in the open ocean, hundreds of millions of tons of fish, shrimps, jellies, and other animals rise from the deep to feed near the surface. Then, at dawn, they descend hundreds of meters to avoid predators. This is the largest animal migration on Earth, and a … Continued

Searching for the Asgards

Almost all visible life on Earth is eukaryotic. Trees, fish, humans, kelp, flowers, and mushrooms all share one thing: they are built from eukaryotic cells. Unlike prokaryotic cells, eukaryotic cells contain a nucleus and mitochondria, the powerhouses that facilitate cellular functions such as eating, breathing, and physical appearance. Yet, where and how the first eukaryote came into existence is still one of biology’s greatest unknowns. Dr. Brett Baker, of the University of Texas at Austin, and an international team of scientists are working to resolve this mystery.

High Seas and Seamounts of the Nazca Ridge

8 July - 9 August 2024 #NazcaHighSeas Lush forests of deep-sea corals and sponges host animals and organisms that defy imagination. Many endangered or threatened species like sea turtles, blue whales, and sharks travel here to feed on the abundant nutrients upwelling from the deep. The 8000-meter-deep Atacama Trench, the Southeast Pacific Oxygen Minimum Zone, … Continued

Ultra Fine-Scale Seafloor Mapping

Expedition dates: October 25 - November 23, 2023 Seafloor mapping is integral to oceanographic research. Bathymetric data illustrate the seafloor’s depth, contours, and physical features, and it is often the first essential step in planning a successful submersible operation. The typical tool for seafloor mapping, multibeam sonar, creates three-dimensional topographical outlines—rather than visual images. Physical … Continued

Vertical Reefs of the Galápagos

Expedition dates: September 18 - October 19, 2023 The Galápagos Islands are home to a dazzling array of cold-water corals. While they are understudied compared to the shallow-water corals, a subset of these deep-dwelling animals is even more shrouded in mystery—cold-water corals living on cliffs. The depth and inaccessibility of vertical corals to ship-based sensors … Continued

Dynamics of Sinking Microplastics

Expedition dates: August 2 - August 7, 2023 Plastic pollution is pervasive in our Ocean. The most prevalent component of plastic pollution isn’t large pieces of trash floating on the surface, but tiny bits of waste called “microplastics” that are found throughout the water column. Ranging from 5 mm in diameter (a pencil eraser) down … Continued

Biodiverse Borderlands

Mineral-Rich Habitats of Southern California The deep sea hosts minerals that contain high quantities of elements that are valuable for human societies. Countries around the world are preparing to develop extractive practices for deep-sea minerals, and baseline biological data are needed to further assess the life that may dwell on or around minerals in different … Continued

Observing Seafloor Methane Seeps at the Edge of Hydrate Stability

Methane is a more potent greenhouse gas than carbon dioxide, but exists at far lower concentrations in the atmosphere. Many think of methane as a free-floating gas so it can be a surprise to learn that nearly one-fifth of the Earth’s methane is stored beneath the ocean’s waters in marine sediments in the form of gas hydrate.

Voyage to the White Shark Café

The Mariana region is home to the Mariana subduction system. This November, scientists shed light on the Mariana back-arc spreading center looking for new sites of hydrothermal activity.