Near-ubiquity of ice-edge blooms in the Arctic

• Published in: Biogeosciences
• Main Authors: Perrette, M., Yool, A., Quartly, G. D., Popova, E. E.
• Format: Text
• Language: English
• Published: 2018
• Subjects: Arctic; Sea ice; ice covered areas
• Online Access: https://doi.org/10.5194/bg-8-515-2011; https://www.biogeosciences.net/8/515/2011/

Ice-edge blooms are significant features of Arctic primary production, yet have received relatively little attention. Here we combine satellite ocean colour and sea-ice data in a pan-Arctic study. Ice-edge blooms occur in all seasonally ice-covered areas and from spring to late summer, being observed in 77–89% of locations for which adequate data exist, and usually peaking within 20 days of ice retreat. They sometimes form long belts along the ice-edge (greater than 100 km), although smaller structures were also found. The bloom peak is on average more than 1 mg m −3 , with major blooms more than 10 mg m −3 , and is usually located close to the ice-edge, though not always. Some propagate behind the receding ice-edge over hundreds of kilometres and over several months, while others remain stationary. The strong connection between ice retreat and productivity suggests that the ongoing changes in Arctic sea-ice may have a significant impact on higher trophic levels and local fish stocks.