Consulta: subjectFacets:"Diatom bound carbon isotopes"
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Data/hora: 13/06/2024 02:09:44

Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica
Provedor de dados: 5
Autores: Panizzo, Virginia; Crespin, Julien; Crosta, Xavier; Shemesh, Aldo; Masse, Guillaume; Yam, Ruth; Mattielli, Nadine; Cardinal, Damien.
Combined high-resolution Holocene δ30Sidiat and δ13Cdiat paleorecords are presented from the Seasonal Ice Zone, East Antarctica. Both data sets reflect periods of increased nutrient utilization by diatoms during the Hypsithermal period (circa 7800 to 3500 calendar years (cal years) B.P.), coincident with a higher abundance of open water diatom species (Fragilariopsis kerguelensis), increased biogenic silica productivity (%BSi), and higher regional summer temperatures. The Neoglacial period (after circa 3500 cal years B.P.) is reflected by an increase in sea ice indicative species (Fragilariopsis curta and Fragilariopsis cylindrus, up to 50%) along with a decrease in %BSi and δ13Cdiat (&lt; −18‰ to −23‰). However, over this period, δ30Sidiat data show an...
Tipo: Text
Palavras-chave: Diatoms; Silicon isotopes; Diatom bound carbon isotopes; Seasonal ice zone; Holocene; Southern Ocean.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00290/40157/39098.pdf