{"refrec":{"BRefID":318228,"RR":"<b>Mojtahid, M.; Hennekam, R.; de Nooijer, L.J.; Reichart, G.-J.; Jorissen, F.; Boer, W.; Le Houedec, S.; de Lange, G.J.</b> (2019). Evaluation and application of foraminiferal element/calcium ratios: Assessing riverine fluxes and environmental conditions during sapropel S1 in the Southeastern Mediterranean. <i>Mar. Micropaleontol. 153</i>: 101783. <a href=\"https://dx.doi.org/10.1016/j.marmicro.2019.101783\" target=\"_blank\">https://dx.doi.org/10.1016/j.marmicro.2019.101783</a>","BEntID":311665,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Mar. Micropaleontol. 153</i>: 101783. <a href=\"https://dx.doi.org/10.1016/j.marmicro.2019.101783\" target=\"_blank\">https://dx.doi.org/10.1016/j.marmicro.2019.101783</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Mojtahid, M.; Hennekam, R.; de Nooijer, L.J.; Reichart, G.-J.; Jorissen, F.; Boer, W.; Le Houedec, S.; de Lange, G.J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Mojtahid, M. <i>et al.</i>","Englishabstract":"Paleostudies often rely on foraminiferal calcite chemistry, which reflect past sea water condition through so-called proxy relationships. One way to evaluate robustness of these proxy relationships is to test them in well-studied and during well-constrained climate transitions. The southeastern (SE) Mediterranean is a perfect natural laboratory with a large range of past environmental conditions. These range from low productivity well-ventilated waters like they are at present, to poorly ventilated, high productivity conditions during sapropels. We here explore the reliability of recently developed foraminiferal-based proxies (Ba/Ca, Mn/Ca, Na/Ca) as tracers for changes in productivity, oxygenation and salinity during the most recent sapropel S1. We use laser ablation ICP-MS analyses of the planktonic <i>G. ruber</i> and six benthic species (<i>B. alata, G. affinis, G. altiformis, G. orbicularis, H. boueana, U. peregrina</i>). Our results show that planktonic Ba/Ca is a reliable tracer for Ba2+-enriched Nile outflow, where benthic Ba/Ca traces enhanced paleo(export) productivity relatively well. The interpretation of Mn/Ca data is less straightforward, and the low values may suggest a lower precipitation of Mn-oxides under prevailing hypoxia. The decrease in planktonic and benthic Na/Ca is coherent with excess Nile runoff lowering salinities in the <500m water column. However, when applying the existing calibrations, unrealistic salinity values are found, highlighting potential secondary controls on Na-incorporation. Benthic Ba/Ca time series analyses highlight a multicentennial variability in paleo(export) productivity, consistently with redox proxies. We conclude that benthic Ba/Ca records the close coupling between Ba cycling, export productivity, and redox conditions during S1 in the SE Mediterranean.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Evaluation and application of foraminiferal element/calcium ratios: Assessing riverine fluxes and environmental conditions during sapropel S1 in the Southeastern Mediterranean","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Sapropel S1; Levantine basin; Productivity; Oxygenation; Salinity; Stable isotopes; Mg/Ca; Ba/Ca; Mn/Ca; Na/Ca","OtherDescriptors":null,"Notes":null,"AnaPub":2019,"MonPub":null,"DateUpdate":"2019-11-25","DateCreate":"2019-11-25","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000528061500004","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.marmicro.2019.101783"},"refs":null,"anarec":{"AnaID":318228,"PubliDate":2019,"Pagination":"101783","XtraPublOfAnaID":null,"ISBN":null,"Volume":"153","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43516,"SerRR":"Marine Micropaleontology. 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