The ocean’s biological carbon pump plays a significant role in the global carbon cycle. The biological pump is a natural process through which carbon is transported from the fast carbon cycle, involving the atmosphere, biosphere, and upper ocean, to the slow carbon cycle, involving the deep ocean and geosphere. The biological pump’s primary mechanism is the biological transformation of CO2 and nutrients into organic carbon in the upper ocean via photosynthesis, which then sinks through the water column, and ultimately decomposes or is buried at depth. Running Tide is developing a nature-based carbon dioxide removal (CDR) system that sustainably amplifies the biological pump’s transfer of carbon from the fast to the slow carbon cycle.This white paper provides an overview of the Earth’s carbon cycle, the ocean’s natural processes for capturing and storing carbon, and how Running Tide’s system is designed to sustainably enhance these processes. Running Tide’s CDR system combines distributed open ocean aquaculture, the sinking of biomass, and ocean alkalinity enhancement to make a significant contribution to the fight against the global climate crisis, while delivering co-benefits for biodiversity, sustainable development, inclusive economic growth, and food security.