Algal Export in the Arctic Ocean in Times of Global Warming


Contact
Eva-Maria.Noethig [ at ] awi.de

Abstract

Satellite‐derived data suggest an increase in annual primary production following the loss of summer sea ice in the Arctic Ocean. The scarcity of field data to corroborate this enhanced algal production incited a collaborative project combining six annual cycles of sequential sediment trap measurements obtained over a 17‐year period in the Eurasian Arctic Ocean. Here we present microalgal fluxes measured at ~200 m to reflect the bulk of algal carbon production. Ice algae contributed to a large proportion of the microalgal carbon export before complete ice melt and possible detection of their production by satellites. In the northern Laptev Sea, annual microalgal carbon fluxes were lower during the 2007 minimum ice extent than in 2006. In 2012, early snowmelt led to early microalgal carbon flux in the Nansen Basin. Hence, a change in the timing of snowmelt and ice algae release may affect productivity and export over the Arctic basins.



Item Type
Article
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Primary Division
Programs
Primary Topic
Research Networks
Peer revision
ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
49729
DOI 10.1029/2019GL083167

Cite as
Lalande, C. , Nöthig, E. M. and Fortier, L. (2019): Algal Export in the Arctic Ocean in Times of Global Warming , Geophysical Research Letters . doi: 10.1029/2019GL083167


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