Seasonal copepod lipid pump promotes carbon sequestration in the deep North Atlantic

Sigrun Jonasdottir, Andre Visser, Katherine Richardson, Michael R. Heath

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Significance Every autumn across the North Atlantic, large numbers of zooplankton copepods migrate from the surface waters into the ocean's interior to hibernate at depths of 600–1,400 m. Through this migration, they actively transport lipid carbon to below the permanent thermocline, where it is metabolized at a rate comparable to the carbon delivered by sinking detritus. This “lipid pump” has not been included in previous estimates of the deep-ocean carbon sequestration, which are based on either measurements of sinking fluxes of detritus, or estimates of new primary production. Unlike other components of the biological pump, the lipid pump does not strip the surface ocean of nutrients, and decouples carbon sequestration from nutrient replenishment, a process we term the “lipid shunt.”
Original languageEnglish
JournalProceedings of the National Academy of Sciences
Volume112
Issue number39
Pages (from-to)12122-12126
ISSN0027-8424
DOIs
Publication statusPublished - 2015

Keywords

  • Biological Sciences
  • Physical Sciences
  • Environmental Sciences-BS
  • Earth, Atmospheric, and Planetary Sciences

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