Tiny plantlike organisms called phytoplankton that form the base of marine food webs topped by orcas, whales, and sharks usually get eaten or slowly sink to the seafloor, carrying carbon as they go. 

Across most of the ocean, the descent from sunlit surface layers takes weeks. But in the Arctic’s Chukchi Sea, scientists have found that a convergence of currents pushes phytoplankton from under the ice to the seafloor at four times the usual speed. 

Two new papers led by researchers in the lab of Stanford biological oceanographer Kevin Arrigo detail this unusual descent and reveal that blooms of phytoplankton, which use energy from the sun to grow, can be 10 times denser in the darker waters below thick sea ice than out in the open water.

A new study published in Science China Earth Sciences presents a comprehensive plan for scientific ocean drilling in the Huatung Basin, a key region in the western Pacific. Researchers propose a four-site drilling strategy for China’s new drilling vessel, Mengxiang, to resolve long-standing debates about the basin's age and the origin of the adjacent Gagua Ridge. The plan aims to determine if the Huatung Basin is a remnant of Mesozoic oceanic crust and to clarify the region's tectonic evolution, marking a potential shift for China’s role in leading international ocean drilling.