{"refrec":{"BRefID":231241,"RR":"<b>Fallet, U.; Ullgren, J.E; Castañeda, I.S.; van Aken, H.M.; Schouten, S.; Ridderinkhof, H.; Brummer, G.J.A.</b> (2011). Contrasting variability in foraminiferal and organic paleotemperature proxies in sedimenting particles of the Mozambique Channel (SW Indian Ocean). <i>Geochim. Cosmochim. Acta 75(20)</i>: 5834-5848. <a href=\"http://dx.doi.org/10.1016/j.gca.2011.08.009\" target=\"_blank\">dx.doi.org/10.1016/j.gca.2011.08.009</a>","BEntID":222953,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Geochim. Cosmochim. Acta 75(20)</i>: 5834-5848. <a href=\"https://dx.doi.org/10.1016/j.gca.2011.08.009\" target=\"_blank\">https://dx.doi.org/10.1016/j.gca.2011.08.009</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Fallet, U.; Ullgren, J.E; Castañeda, I.S.; van Aken, H.M.; Schouten, S.; Ridderinkhof, H.; Brummer, G.J.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Fallet, U. <i>et al.</i>","Englishabstract":"Accurate sea surface temperature (SST) proxies are important for understanding past ocean and climate systems. Here, we examine material collected from a deep-moored sediment trap in the Mozambique Channel (SW Indian Ocean) to constrain and compare both inorganic (delta O-18, Mg/Ca) and organic (U-37(k'), TEX86) temperature proxies in a highly dynamic oceanographic setting for application in paleoceanography. High-resolution time-series current velocity data from long-term moorings (2003 - present) deployed across the Mozambique Channel reveal the periodic migration of four to six meso-scale eddies through the channel per year. These meso-scale eddies strongly influence water mass properties including temperature and salinity. Despite the dynamic oceanographic setting, fluxes of the surface-dwelling planktonic foraminifera Globigerinoides ruber and Globigerinoides trilobus follow a seasonal pattern. Temperatures reconstructed from G. ruber and G. trilobus delta O-18 and Mg/Ca closely mirror seasonal SST variability and their flux-weighted annual mean SSTs of 28.1 degrees C and 27.3 degrees C are in close agreement with annual mean satellite SST (27.6 degrees C). The sub-surface dwelling foraminifera Neogloboquadrina dutertrei and Globigerinoides scitula recorded high-frequency temperature variations that, on average, reflect conditions at water depths of 50-70 m and 200-250 m, respectively. Concentrations and fluxes of organic compounds (alkenones and crenarchaeol) display no or only moderate seasonality but flux weighted means of the associated temperature signatures, U-37(k'), and TEX86H of 28.3 degrees C and 28.1 degrees C, respectively, also closely reflect mean annual SST. We analyzed all time-series data using multiple statistical approaches including cross-correlation and spectral analysis. Eddy variability was clearly expressed in the statistical analysis of physical oceanographic parameters (current velocity and sub-surface temperature) and revealed a frequency of four to six cycles per year. In contrast, statistical analysis of proxy data from the sediment trap did not reveal a significant coupling between eddy migration and organic compound fluxes or reconstructed temperatures. This is likely a result of the relatively low resolution (21 days) and short (2.5 years) duration of the time series, which is close to the detection limit of the eddy frequency.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Contrasting variability in foraminiferal and organic paleotemperature proxies in sedimenting particles of the Mozambique Channel (SW Indian Ocean)","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":2011,"MonPub":null,"DateUpdate":"2016-09-22","DateCreate":"2013-12-01","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000295641600002","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.gca.2011.08.009"},"refs":null,"anarec":{"AnaID":231241,"PubliDate":2011,"Pagination":"5834-5848","XtraPublOfAnaID":null,"ISBN":null,"Volume":"75","Issue":"20","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42901,"SerRR":"Geochimica et Cosmochimica Acta. Elsevier: Oxford,New York etc..  ISSN 0016-7037; e-ISSN 1872-9533","StandardTitleSer":"Geochimica et Cosmochimica Acta","ISSN":"0016-7037","AbbrevSer":"Geochim. Cosmochim. 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