{"refrec":{"BRefID":257730,"RR":"<b>Boudreau, B.; Middelburg, J.; Hofmann, A.; Meysman, F.J.R.</b> (2010). Ongoing transients in carbonate compensation. <i>Global Biogeochem. Cycles 24(4)</i>. <a href=\"http://dx.doi.org/10.1029/2009GB003654\" target=\"_blank\">dx.doi.org/10.1029/2009GB003654</a>","BEntID":249740,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Global Biogeochem. Cycles 24(4)</i>. <a href=\"https://dx.doi.org/10.1029/2009GB003654\" target=\"_blank\">https://dx.doi.org/10.1029/2009GB003654</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Boudreau, B.; Middelburg, J.; Hofmann, A.; Meysman, F.J.R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Boudreau, B. <i>et al.</i>","Englishabstract":"Uptake of anthropogenic CO<sub>2</sub> is acidifying the oceans. Over the next 2000 years, this will modify the dissolution and preservation of sedimentary carbonate. By coupling new formulas for the positions of the calcite saturation horizon, z<sub>sat</sub>, the compensation depth, z<sub>cc</sub>, and the snowline, z<sub>snow</sub>, to a biogeochemical model of the oceanic carbonate system, we evaluate how these horizons will change with ongoing ocean acidification. Our model is an extended Havardton-Bear-type box model, which includes novel kinetic descriptions for carbonate dissolution above, between, and below these critical depths. In the preindustrial ocean, z<sub>sat</sub> and z<sub>cc</sub> are at 3939 and 4750 m, respectively. When forced with the IS92a CO<sub>2</sub> emission scenario, the model forecasts (1) that z<sub>sat</sub> will rise rapidly (“runaway” conditions) so that all deep water becomes undersaturated, (2) that z<sub>cc</sub> will also rise and over 1000 years will pass before it will be stabilized by the dissolution of previously deposited CaCO<sub>3</sub>, and (3) that z<sub>snow</sub> will respond slowly to acidification, rising by ~1150 m during a 2000 year timeframe. A further simplified model that equates the compensation and saturation depths produces quantitatively different results. Finally, additional feedbacks due to acidification on calcification and increased atmospheric CO<sub>2</sub> on organic matter productivity strongly affect the positions of the compensation horizons and their dynamics.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Ongoing transients in carbonate compensation","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":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2010,"MonPub":null,"DateUpdate":"2016-06-21","DateCreate":"2016-05-29","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000283942700001","VABBcode":null,"OpenAcc":1,"DOI":"10.1029/2009GB003654"},"refs":null,"anarec":{"AnaID":257730,"PubliDate":2010,"Pagination":null,"XtraPublOfAnaID":null,"ISBN":null,"Volume":"24","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45841,"SerRR":"Global Biogeochemical Cycles. 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