Reconstructing the upper water column thermal structure in the Atlantic Ocean

noaa-ocean-16400 Atlantic Ocean Core Top Trace Element and Stable Isotope Data Cléroux, C.; deMenocal, P.B.; Arbuszewski, J.A.; Linsley, B.K. Atlantic Ocean Core Top Trace Element and Stable Isotope Data 2014-04-23 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16400 Investigator C. Cléroux Investigator P.B. deMenocal Investigator J.A. Arbuszewski Investigator B.K. Linsley earth science paleoclimate paleoceanography magnesium/calcium,Neogloboquadrina dutertrei,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography manganese/calcium,Globorotalia inflata,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography strontium/calcium,Globorotalia inflata,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Globorotalia tumida,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography iron/calcium,Globorotalia crassaformis,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina dutertrei,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography magnesium/calcium,Globorotalia inflata,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography manganese/calcium,Globorotalia truncatulinoides,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography strontium/calcium,Globorotalia tumida,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography latitude,null,null,degree,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography strontium/calcium,Neogloboquadrina dutertrei,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography manganese/calcium,Globorotalia hirsuta,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography iron/calcium,Globorotalia inflata,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography manganese/calcium,Globorotalia tumida,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Globorotalia crassaformis,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography iron/calcium,Neogloboquadrina dutertrei,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,foraminiferal size fraction earth science paleoclimate paleoceanography delta 13C,Globorotalia hirsuta,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Globorotalia truncatulinoides,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,core name earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,foraminifera taxon name earth science paleoclimate paleoceanography collection water depth,null,null,meter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography iron/calcium,Globorotalia hirsuta,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography strontium/calcium,Globorotalia hirsuta,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Globorotalia inflata,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography iron/calcium,Globorotalia truncatulinoides,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography magnesium/calcium,Globorotalia truncatulinoides,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Globorotalia truncatulinoides,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography iron/calcium,Globorotalia tumida,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Globorotalia hirsuta,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,C,foraminiferal size fraction earth science paleoclimate paleoceanography delta 18O,Globorotalia crassaformis,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Neogloboquadrina dutertrei,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Globorotalia inflata,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography strontium/calcium,Globorotalia truncatulinoides,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography longitude,null,null,degree,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography manganese/calcium,Globorotalia crassaformis,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography manganese/calcium,Neogloboquadrina dutertrei,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography magnesium/calcium,Globorotalia tumida,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography magnesium/calcium,Globorotalia crassaformis,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography strontium/calcium,Globorotalia crassaformis,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography magnesium/calcium,Globorotalia hirsuta,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Globorotalia tumida,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes geoscientificInformation 1000 cal yr BP 0 cal yr BP Complete -25 42 -50 -5 Ocean Atlantic Ocean Mid-Atlantic Meridional Transect>LATITUDE >LONGITUDE None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. 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Boulder CO 80305-3328 USA online ASCII Caroline Cléroux, Peter deMenocal, Jennifer Arbuszewski, and Brad Linsley 2013 Reconstructing the upper water column thermal structure in the Atlantic Ocean Paleoceanography 28 3 503-516 10.1002/palo.20050 http://onlinelibrary.wiley.com/doi/10.1002/palo.20050/abstract

The thermal structure of the upper ocean (0-1000 m) is set by surface heat fluxes, shallow wind-driven circulation, and the deeper thermohaline circulation. Its long-term variability can be reconstructed using deep-dwelling planktonic foraminifera that record subsurface conditions. Here we used six species (Neogloboquadrina dutertrei, Globorotalia tumida, Globorotalia inflata, Globorotalia truncatulinoides, Globorotalia hirsuta, and Globorotalia crassaformis) from 66 core tops along a meridional transect spanning the mid-Atlantic (42°N to 25°S) to develop a method for reconstructing past thermocline conditions. We estimated the calcification depths from d18O measurements and the Mg/Ca-temperature relationships for each species. This systematic strategy over this large latitudinal section reveals distinct populations with different Mg/Ca-temperature relationships for G. inflata, G. truncatulinoides, and G. hirsuta in different areas. The calcification depths do not differ among the different populations, except for G. hirsuta, where the northern population calcifies much shallower than the southern population. N. dutertrei and G. tumida show a remarkably constant calcification depth independent of oceanographic conditions. The deepest dweller, G. crassaformis, apparently calcifies in the oxygen-depleted zone, where it may find refuge from predators and abundant aggregated matter to feed on. We found a good match between its calcification depth and the 3.2 ml/l oxygen level. The results of this multispecies, multiproxy study can now be applied down-core to facilitate the reconstruction of open-ocean thermocline changes in the past. STUDY NOTES: Trace element ratios (Mg, Sr, Mn, Fe) and stable isotope (d18O, d13C) of 6 planktonic foraminifera species (G. dutertrei, G. tumida, G. truncatulinoides, G. inflata, G. crassaformis, G. hirsuta) from 66 coretops in the Atlantic Ocean. Coretops are located between 42°N and 25°S. For each coretop sample, 10 to 25 specimens were picked, gently crushed between two glass plates,mixed, and split into four aliquots: two replicates for trace element analysis (ICP-OES) and two replicates for stable isotope analysis (Optima mass spectrometer).

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cleroux2013/cleroux2013crass.txt Data File; G. crassaformis Trace Element and Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cleroux2013/cleroux2013trunc.txt Data File; G. truncatulinoides Trace Element and Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cleroux2013/cleroux2013duter.txt Data File; G. dutertrei Trace Element and Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cleroux2013/cleroux2013hirsuta.txt Data File; G. hirsuta Trace Element and Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cleroux2013/cleroux2013inflata.txt Data File; G. inflata Trace Element and Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cleroux2013/cleroux2013tumida.txt Data File; G. tumida Trace Element and Stable Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11