Small phytoplankton contribution to the total primary production during three cruises (ANA02C, ANA04B, ANA06B) in the Amundsen Sea, Antarctica

To estimate carbon and nitrogen uptake of phytoplankton at different locations, productivity experiments were conducted by incubating phytoplankton in the incubators on the deck for 3-4 hours after adding stable isotopes (13C, 15NO3, and 15NH4) as tracers into each bottle. Productivity experiments were completed during three cruises. The samples for productivity were collected by CTD rosette water samplers at 6 different light depths (100, 50, 30, 12, 5 and 1%). To understand the spatial distribution of phytoplankton productivity and to assess effect of climate change on ocean ecosystem, productivity experiments were executed in the Amundsen Sea, Antarctica.