Scientific Ocean Drilling in the news

The world’s ice sheet methane reserves have long been treated as a slow-moving climate threat. Ocean warming will eventually destabilize the frozen solids holding this gas in place, but the process was supposed to take decades or longer.

Off the coast of Cape Cod, something unexpected lurks beneath the seafloor: Fresh water. This year, Earth Sciences doctoral student Gretl King participated in an expedition through the National Science Foundation and International Ocean Drilling Program (IODP3) to investigate the phenomenon.

An international team of scientists has discovered that methane hydrates beneath the northwest Greenland continental shelf became rapidly destabilised by meltwater, releasing large stores of methane during ice-sheet retreat across the continental shelf.

In the deep parts of the South Atlantic Ocean, researchers have uncovered a surprising geological feature embedded in fractured and broken volcanic rocks located below the seafloor. Far from looking like common debris, the rocks appear to hide geological sponges able to store vast quantities of carbon dioxide over millions of years.

In what can only be described as a herculean accomplishment, a team of scientists has succeeded in bringing to the surface a long, 1,268-meter section of rocks from the Earth’s Mantle. This layer, hidden beneath the crust, forms the largest chunk of our planet.

Reaching 1,267.8 meters below the seabed, a scientific expedition in the Atlantic successfully drilled into the Atlantis Massif, an underwater mountain near the Mid-Atlantic Ridge, and recovered a record core of rocks directly linked to the Earth’s mantle. Responsible for the operation, Expedition 399 of the International Ocean Discovery Program (IODP) gained access to materials rarely observed directly, usually hidden beneath kilometers of oceanic crust that hinder deep investigations.

In September 2024, the Japan Agency for Marine-Earth Science and Technology announced an unprecedented milestone in geological science: a record-breaking deep-sea drilling operation of 7,906 meters below the ocean surface, using the scientific vessel Chikyu, to directly investigate the rupture zone of the 2011 Tohoku megathrust earthquake, which occurred off the northeast coast of Japan.

In a groundbreaking study published in the journal Nature Communications, an international team of researchers revealed they found living microorganisms at depths previously thought to be nearly sterile. The discovery occurred during an expedition to the Amundsen Sea off the coast of West Antarctica. The team drilled hundreds of meters into the ocean floor, uncovering life in sediment that is millions of years old.

Scientists finally drilled more than a kilometer into Earth’s mantle under the Atlantic Ocean and the rocks they pulled up tell a story about life, climate, and even future energy that starts far below the waves. Working from the research vessel JOIDES Resolution, an international team recovered a continuous 1,268-meter-long core of mantle rock from beneath the seafloor at the Atlantis Massif, near the Mid Atlantic Ridge.

Back in March 2011, a magnitude 9.1 earthquake off northeast Japan sent walls of water crashing into coastal towns and power plants. The tsunami killed tens of thousands of people and crippled the Fukushima Daiichi nuclear power plant, a disaster that still shapes evacuation drills and sea wall debates today.