Geochemical composition of Baltic benthic foraminifera collected and cultured over a large salinity gradient.

Summary, in English

Some of the most significant challenges in paleoclimate research arise from the need to both understand and reduce the uncertainty associated with proxies for climate reconstructions. These challenges were further highlighted in connection with the IODP Exp.347 Baltic Sea Paleoenvironment. We have investigated temperature and salinity proxies through a combination of field-and culture-based benthic foraminiferal samplesfrom the Baltic(sal. 14)-Kattegat(sal. 32), together with genetic characterization. Two long-term experiments at twotemperatures and three salinities were performed. We present foraminiferal assemblage,trace element (Mg/Ca, Ba/Ca, Mn/Ca),and stable O and C isotope results from these locations, including LA-ICP-MS data from cultured specimens. Furthermore, specimens of Elphidium and Ammonia were genetically characterized; the results indicate that the same genetic type of Elphidiumis found in both salinity regimes, but that the Ammoniagenetic types differ depending on the prevailing salinity regime.

• Author: Helena L. Filipsson; Jeroen Groeneveld; William E N Austin; Kate F. Darling; Nadine B Quintana Krupinski; Clare Bird; David McCarthy; Edward Hathorne; Magali Schweizer
• Department/s: Quaternary Sciences
• Publishing year: 2017-08-17
• Language: English
• Links: https://goldschmidt.info/2017/abstracts/abstractView?id=2017003132
• Document type: Conference paper: abstract
• Topic: Geology
• Conference name: Goldschmidt Conference on Geochemistry
• Conference date: 2017-08-13 - 2017-08-18
• Conference place: Paris, France
• Status: Published
• Project: Fält och experimentell kalibrering av marina temperaturindikatorer genom användning av bentiska foraminiferer