Massive Phytoplankton Blooms Under Arctic Sea Ice

• Published in: Science
• Main Authors: Arrigo, Kevin R., Perovich, Donald K., Pickart, Robert S., Brown, Zachary W., van Dijken, Gert L., Lowry, Kate E., Mills, Matthew M., Palmer, Molly A., Balch, William M., Bahr, Frank, Bates, Nicholas R., Benitez-Nelson, Claudia, Bowler, Bruce, Brownlee, Emily, Ehn, Jens K., Frey, Karen E., Garley, Rebecca, Laney, Samuel R., Lubelczyk, Laura, Mathis, Jeremy, Matsuoka, Atsushi, Mitchell, B. Greg, Moore, G. W. K., Ortega-Retuerta, Eva, Pal, Sharmila, Polashenski, Chris M., Reynolds, Rick A., Schieber, Brian, Sosik, Heidi M., Stephens, Michael, Swift, James H.
• Other Authors: Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2012
• Subjects: ECOLOGY; [SDU]Sciences of the Universe [physics]; Arctic; Arctic Ocean; Chukchi Sea; Chukchi; Phytoplankton; Sea ice
• Online Access: https://hal.science/hal-04110602; https://doi.org/10.1126/science.1215065

International audience Phytoplankton blooms over Arctic Ocean continental shelves are thought to be restricted to waters free of sea ice. Here, we document a massive phytoplankton bloom beneath fully consolidated pack ice far from the ice edge in the Chukchi Sea, where light transmission has increased in recent decades because of thinning ice cover and proliferation of melt ponds. The bloom was characterized by high diatom biomass and rates of growth and primary production. Evidence suggests that under-ice phytoplankton blooms may be more widespread over nutrient-rich Arctic continental shelves and that satellite-based estimates of annual primary production in these waters may be underestimated by up to 10-fold.