The future of Arctic sea-ice biogeochemistry and ice-associated ecosystems

Delphine Lannuzel, Letizia Tedesco, Maria van Leeuwe, Karley Campbell, Hauke Flores, Bruno Delille, Lisa Miller, Jacqueline Stefels, Philipp Assmy, Jeff Bowman, Kristina Brown, Giulia Castellani, Melissa Chierici, Odile Crabeck, Ellen Damm, Brent Else, Agneta Fransson, François Fripiat, Nicolas-Xavier Geilfus, Caroline JacquesElizabeth Jones, Hermanni Kaartokallio, Marie Kotovitch, Klaus Meiners, Sébastien Moreau, Daiki Nomura, Ilka Peeken, Janne-Markus Rintala, Nadja Steiner, Jean-Louis Tison, Martin Vancoppenolle, Fanny van der Linden, Marcello Vichi, Pat Wongpan

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The Arctic sea-ice-scape is rapidly transforming. Increasing light penetration will initiate earlier seasonal primary production. This earlier growing season may be accompanied by an increase in ice algae and phytoplankton biomass, augmenting the emission of dimethylsulfide and capture of carbon dioxide. Secondary production may also increase on the shelves, although the loss of sea ice exacerbates the demise of sea-ice fauna, endemic fish and megafauna. Sea-ice loss may also deliver more methane to the atmosphere, but warmer ice may release fewer halogens, resulting in fewer ozone depletion events. The net changes in carbon drawdown are still highly uncertain. Despite large uncertainties in these assessments, we expect disruptive changes that warrant intensified long-term observations and modelling efforts.
Original languageEnglish
Pages (from-to)983-992
Number of pages10
JournalNature Climate Change
Issue number11
Early online date27 Oct 2020
Publication statusPublished - 1 Nov 2020

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