April 2, 2020:  A study that included the first-ever winter sampling of phytoplankton in the North Atlantic revealed cells smaller than what scientists expected, meaning commonly used carbon sequestration models may be over-optimistic.   The OSU research into the microscopic algae, part of NASA’s North Atlantic Aerosols and Marine Ecosystems Study, was published today in the International Society for Microbial Ecology Journal.  The findings are significant because the spring phytoplankton bloom in the North Atlantic “is probably the largest biological carbon sequestration mechanism on the planet each year, and the size of cells determines how fast that carbon sinks,” said the study’s corresponding author, OSU microbiology researcher Dr. Stephen Giovannoni.  The lead author, Dr. Luis Bolaños, was a postdoc in Giovanonni’s Lab. By Steve Lundeberg, /Dr. Stephen Giovannoni