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Browsing by Author "Fawcett, SE"

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A circum-antarctic plankton isoscape: Carbon export potential across the summertime Southern Ocean

Author: Stirnimann, J ; Bornman, TG ; Forrer, HJ ; Mirkin, J ; Ryan-Keogh, Thomas J ; Flynn, RF ; Dorrington, RA ; Verheye, HM ; Fawcett, SE Date: Jan 2024 The Southern Ocean accounts for 30% of the ocean's CO2 sink, partly due to its biological pump that transfers surface-produced organic carbon to deeper waters. To estimate large-scale Southern Ocean carbon export potential and characterize ... Read more
Isotopic evidence for nitrification in the Antarctic winter mixed layer

Author: Smart, SM ; Fawcett, SE ; Thomalla, Sandy J ; Weigand, MA ; Reason, CJC ; Sigman, DM Date: Apr 2015 We report wintertime nitrogen and oxygen isotope ratios (δ15N and δ18O) of seawater nitrate in the Southern Ocean south of Africa. Depth profile and underway surface samples collected in July 2012 extend from the subtropics to just beyond the ... Read more
The seasonal cycle of nitrogen uptake and nitrification in the Atlantic sector of the Southern Ocean

Author: Mdutyana, M ; Thomalla, Sandy J ; Philibert, R ; Ward, BB ; Fawcett, SE Date: Jul 2020 Net primary production (NPP) fueled by nitrate is often equated with carbon export, providing a metric for CO2 removal to the deep ocean. This “new production paradigm” assumes that nitrification, the oxidation of regenerated ammonium to ... Read more

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Browsing by Author "Fawcett, SE"

Browsing by Author "Fawcett, SE"

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