Author:Mdutyana, M; Thomalla, Sandy J; Philibert, R; Ward, BB; Fawcett, SEDate:Jul 2020Net 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
Author:Henson, SA; Briggs, N; Carvalho, F; Manno, C; Mignot, A; Thomalla, Sandy JDate:Apr 2023The biological carbon pump (BCP) contributes to the oceanic CO2 sink by transferring particulate organic carbon (POC) into the deep ocean. The magnitude and efficiency of the BCP is likely to vary on timescales of days to seasons, however ...Read morecbnd
Author:Giddy, Isabelle; Swart, S; Du Plessis, Marcel; Thompson, AF; Nicholson, Sarah-AnneDate:Mar 2021In the sea-ice-impacted Southern Ocean, the spring sea-ice melt and its impact on physical processes set the rate of surface water mass modification. These modified waters will eventually subduct near the polar front and enter the global ...Read more
Author:Ryan-Keogh, Thomas J; Smith, WODate:Mar 2021The Ross Sea is one of the most productive regions in the Southern Ocean, with a significant role in carbon cycling as well as the massive abundance of higher trophic levels. The seasonal cycle is well established with an early summer Phaeocystis ...Read more
Author:Giddy, IS; Fer, I; Swart, S; Nicholson, Sarah-AnneDate:May 2023The seasonal warming of Antarctic Winter Water (WW) is a key process that occurs along the path of deep water transformation to intermediate waters. These intermediate waters then enter the upper branch of the circumpolar overturning circulation. ...Read more
Author:Thomalla, Sandy J; Nicholson, Sarah-Anne; Ryan-Keogh, Thomas J; Smith, Marie EDate:Aug 2023Climate change is expected to elicit widespread alterations to nutrient and light supply, which interact to influence phytoplankton growth and their seasonal cycles. Using 25 years of satellite chlorophyll a data, we show that large regions ...Read more