Assessing the reliability of foraminiferal Mg/Ca thermometry by comparing field-samples and culture experiments: a review

Large Sea Surface Temperature, Salinity, and Productivity‐Preservation Changes Preceding the Onset of the Messinian Salinity Crisis in the Eastern Mediterranean Sea

“…Late Miocene sea surface temperature (SST) records are sparse, and only one deals with the Mediterranean (Tzanova et al, ). Foraminifera stable oxygen isotope and Mg/Ca proxies suffer from biases (preservation, diagenesis, and salinity) in the Mediterranean realm, which render them insufficient for SST reconstructions (Antonarakou, Kontakiotis, Zarkogiannis, et al, , Antonarakou, Kontakiotis, Vasilatos, et al, ; Kontakiotis et al, , Kontakiotis, Mortyn, et al, , Kontakiotis et al, ). Alkenone paleothermometry (U K′ 37 ‐index‐based SST) appears more suitable/less biased in the Mediterranean Sea (Herbert et al, ) although those alkenones were produced by extinct species of haptophytes (Athanasiou et al, ; Herbert et al, ; Tzanova et al, ).…”

Mg∕Ca, Sr∕Ca and stable isotopes from the planktonic foraminifera <i>T. sacculifer</i>: testing a multi-proxy approach for inferring paleotemperature and paleosalinity

“…Mg concentrations were calculated using masses 24 and 26; Sr concentrations were calculated with mass 88. One big advantage in using LA-ICP-MS measurements is that single laser pulses remove only a few nanometers of material, which allows high-resolution trace element profiles to be acquired (e.g., Reichart et al, 2003;Regenberg et al, 2006;Dueñas-Bohórquez et al, 2009Hathorne et al, 2009;Munsel et al, 2010;Dissard et al, , 2010aEvans et al, 2013Evans et al, , 2015Steinhardt, 2014Steinhardt, , 2015Fehrenbacher et al, 2015;Langer et al, 2016;Koho et al, 2015Koho et al, , 2017Fontanier et al, 2018;de Nooijer et al, 2007de Nooijer et al, , 2014de Nooijer et al, , 2017aJentzen et al, 2018;Schmitt et al, 2019;Levi et al, 2019). Element concentrations were calculated for the individual ablation profiles integrating the different isotopes (glitter software).…”

“…The oxygen isotope composition of D. Dissard et al: Foraminifera multi-proxy approach foraminiferal calcite (δ 18 O c ) is thus controlled by the temperature of calcification (Urey, 1947;Epstein et al, 1953) but also by the oxygen isotope composition of seawater (δ 18 O w ). The relative contribution of these two factors cannot be deconvolved without an independent measure of the temperature at the time of calcification, such as e.g., Mg/Ca (e.g., Nürnberg et al, 1996;Rosenthal et al, 1997;Rathburn and DeDeckker, 1997;Hastings et al, 1998;Lea et al, 1999;Lear et al, 2002;Toyofuku et al, 2000;Anand et al, 2003;Kisakurek et al, 2008;Dueñas-Bohórquez et al, 2009Honisch et al, 2013;Kontakiotis et al, 2016;Jentzen et al, 2018). The sea surface temperature reconstructed from the Mg/Ca of foraminiferal calcite has, therefore, increasingly been used in combination with the δ 18 O signal measured from the same material to estimate δ 18 O w and global ice volume and to infer past sea surface salinity (SSS) (e.g., Rohling 2000;Elderfield and Ganssen, 2000;Schmidt et al, 2004;Weldeab et al, 2005;.…”

Key Environmental Factors Controlling Planktonic Foraminiferal and Pteropod Community’s Response to Late Quaternary Hydroclimate Changes in the South Aegean Sea (Eastern Mediterranean)

“…Environmental changes related to the different water column and/or sediment characteristics can be recorded virtually instantaneously in paleoceanographic proxy data, such as stable isotope and other geochemical ratios [22][23][24][25][26][27][28][29][30][31], and micro-fossil abundances, such as planktonic foraminifera and pteropods [15,17,28,[32][33][34][35][36]. This makes them extremely valuable for both stratigraphic correlations and paleoenvironmental/paleoclimate reconstructions [15,23,28,29,32,35,[37][38][39][40][41][42][43][44][45].…”