Free-Falling Eddy Lander for Monitoring Deep Ocean Floor Carbon Cycling

The deep ocean plays a critical role in regulating Earth’s climate, yet it remains one of the least understood components of the global carbon cycle. Most organic carbon that sinks to the seafloor is recycled back into the ocean as carbon dioxide, shaping long‑term climate dynamics. Despite this importance, scientists have limited direct measurements of how carbon is processed on the deep seafloor. Existing methods are expensive, logistically complex, and often disturb the environments they aim to study, leaving major gaps in data and uncertainty in climate models.

The proposed research addresses this challenge by developing an autonomous ocean lander capable of measuring seafloor oxygen exchange, a key indicator of carbon cycling, without relying on costly remotely operated vehicles. Building on a proven, non‑invasive technique pioneered by the research team, the lander can be deployed directly from a research vessel, operate at depths up to 4,000 meters, and return to the surface independently. This design enables more frequent, flexible, and environmentally sensitive measurements across seasons and locations.

The funding provided allowed the team to move forward during a delay in federal support. Without this bridge funding, construction of the lander would have stalled, causing the team to miss the fabrication deadline required to secure their berth on a spring research cruise. Losing that cruise would have created a significant data gap, interrupting a multi‑year record of seafloor carbon cycling measurements and limiting the ability to detect seasonal and interannual changes. 

By making deep‑ocean measurements more accessible and affordable the project will significantly advance understanding of how carbon moves through the ocean and influences climate over long timescales. The technology also opens new opportunities for ocean research beyond carbon cycling, supporting more sustainable use of research funding and strengthening society’s ability to monitor and respond to global environmental change.