Marine snow acts as a primary vehicle for the biological pump, sequestering large amounts of organic carbon from the atmosphere down into the deep ocean. Multiple studies confirm that this sinking flux drives long-term ocean carbon storage, despite being modulated by twilight zone remineralization and aggregation physics.
The claim is specific and empirically testable, passing Step 0 easily. All retrieved papers discuss the role of marine snow, particulate organic carbon flux, and biological carbon pumps in transporting carbon to the deep ocean. The evidence is robust and points entirely in favor of the claim, making the verdict SUPPORTED.