{"refrec":{"BRefID":247145,"RR":"<b>Diester-Haass, L; Billups, K; Jacquemin, I.; Emeis, C; Lefebvre, V; François, L.</b> (2013). Paleoproductivity during the middle Miocene carbon isotope events: a data-model approach. <i>Paleoceanography 28(2)</i>: 334-346. <a href=\"http://dx.doi.org/10.1002/palo.20033\" target=\"_blank\">dx.doi.org/10.1002/palo.20033</a>","BEntID":238845,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Paleoceanography 28(2)</i>: 334-346. <a href=\"https://dx.doi.org/10.1002/palo.20033\" target=\"_blank\">https://dx.doi.org/10.1002/palo.20033</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Diester-Haass, L; Billups, K; Jacquemin, I.; Emeis, C; Lefebvre, V; François, L.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Diester-Haass, L <i>et al.</i>","Englishabstract":"To what extent are individual middle Miocene eccentricity-scale benthic foraminiferal carbon isotope maxima (the so-called CM events) related to changes in marine export productivity? Here we use benthic foraminiferal accumulation rates from three sites in the Pacific and Southern Oceans and a geochemical box model to assess relationships between benthic foraminiferal <i>d</i><sup>13</sup>C records, export productivity, and the global carbon cycle. Results from Deep Sea Drilling Project Hole 588 and Ocean Drilling Program Site 747 show a distinct productivity maximum during CM 6 at 13.8?Ma, the time of major expansion of ice on Antarctica. Productivity maxima during other CM events are only recorded at high-latitude Site 747. A set of numerical experiments tests whether changes in foraminiferal <i>d</i><sup>13</sup>C records (CM events) and export productivity can be simulated solely by sea level fluctuations and the associated changes in global weathering-deposition cycles, by sea level fluctuations plus global climatic cooling, and by sea level fluctuations plus invigorated ocean circulation. Consistent with data, the periodic forcing of sea level and albedo (and associated weathering cycles) produces <i>d</i><sup>13</sup>C variations of the correct temporal spacing, albeit with a reduced amplitude. A productivity response of the correct magnitude is achieved by enhancing ocean circulation during cold periods. We suggest that the pacing of middle Miocene <i>d</i><sup>13</sup>C fluctuations is associated with cyclical sea level variations. The amplitude, however, is muted perhaps due to the competing effects of a time-lagged response to sea level lowstands but an immediate response to invigorated ocean circulation during cold phases.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Paleoproductivity during the middle Miocene carbon isotope events: a data-model approach","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":"Mid MIocene paleoproductivity","OtherDescriptors":null,"Notes":null,"AnaPub":2013,"MonPub":null,"DateUpdate":"2015-06-01","DateCreate":"2015-05-21","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000322013900011","VABBcode":null,"OpenAcc":1,"DOI":"10.1002/palo.20033"},"refs":null,"anarec":{"AnaID":247145,"PubliDate":2013,"Pagination":"334-346","XtraPublOfAnaID":null,"ISBN":null,"Volume":"28","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45633,"SerRR":"Paleoceanography. 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