%0 Journal article
%A Levy, N.
%A Torfstein, A.
%A Schiebel, R.
%A Chernihovsky, N.
%A Jochum, K. P.
%A Weis, U.
%A Stoll, B.
%A Haug, G. H.
%T Temperature Calibration of Elevated Mg/Ca in Planktic Foraminifera Shells From the Hypersaline Gulf of Aqaba
%R 10.1029/2022GC010742
%J Geochemistry, Geophysics, Geosystems
%V 24
%N 7

%I 
%X <title xmlns:mml="http://www.w3.org/1998/Math/MathML">Abstract</title><p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en">The Mg/Ca of marine calcareous Planktic Foraminifera (PF) shells is commonly used for sea surface temperature reconstructions. However, compared to open marine environments, hypersaline (&gt;40) oligotrophic seas have been shown to accommodate PF with higher Mg/Ca and divergent temperature to Mg/Ca relationships. To investigate influencing factors of PF Mg uptake in hypersaline regions, we measured the Mg/Ca of two flux‐dominating PF species, <italic>Globigerinoides ruber albus</italic> and <italic>Turborotalita clarkei</italic>, derived from a monthly resolved time series of sediment traps in the Gulf of Aqaba, northern Red Sea as well as the corresponding temperature, salinity, and <italic>p</italic>H values. The PF exhibit elevated Mg/Ca which cannot be explained by post‐deposition or interstitial sediment diagenetic processes. <italic>G. ruber albus</italic> displays Mg/Ca trends that strongly follow seasonal mixed layer temperature changes. Conversely, <italic>T</italic>. <italic>clarkei</italic> Mg/Ca trends do not follow temperature but rather show significant Mg/Ca enrichment following mixing of the surface water column. We present a framework for incorporating elevated Mg/Ca into global Mg/Ca‐T calibrations for <italic>G</italic>. <italic>ruber albus</italic> and present a new Mg/Ca‐T calibration suitable for hypersaline marine environments.</p>
%U http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11447
%~  FID GEO-LEO e-docs