# Atlantic Ocean Core Top Trace Element and Stable Isotope Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # # Online_Resource: http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:16400 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cleroux2013/cleroux2013inflata.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleoceanography #-------------------- # Contribution_Date # Date: 2014-04-23 #-------------------- # Title # Study_Name: Atlantic Ocean Core Top Trace Element and Stable Isotope Data #-------------------- # Investigators # Investigators: Cléroux, C.; deMenocal, P.; Arbuszewski, J.; Linsley, B. #-------------------- # Description_and_Notes # Description: 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). #-------------------- # Publication # Authors: Caroline Cléroux, Peter deMenocal, Jennifer Arbuszewski, and Brad Linsley # Published_Date_or_Year: 2013-09-16 # Published_Title: Reconstructing the upper water column thermal structure in the Atlantic Ocean # Journal_Name: Paleoceanography # Volume: 28 # Edition: # Issue: 3 # Pages: 503-516 # DOI: 10.1002/palo.20050 # Online_Resource: http://onlinelibrary.wiley.com/doi/10.1002/palo.20050/abstract # Full_Citation: # 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. #------------------ # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: OCE-0927247 and OCE-07-52649 #------------------ # Site_Information # Site_Name: Mid-Atlantic Meridional Transect # Location: Ocean>Atlantic Ocean # Country: # Northernmost_Latitude: 42.0 # Southernmost_Latitude: -25.0 # Easternmost_Longitude: -5.0 # Westernmost_Longitude: -50.0 # Elevation: m #------------------ # Data_Collection # Collection_Name: Cleroux2013inflata # Earliest_Year: 1000 # Most_Recent_Year: 0 # Time_Unit: Cal. Year BP # Core_Length: m # Notes: #------------------ # Chronology: # # # #---------------- # Variables # # Data variables follow that are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ##core core name, , , , , , , ,C ##lat latitude, , , degrees, , , , ,N ##long longitude, , , degrees, , , , ,N ##water-depth water depth, , , m, , , , ,N ##species species, , , , , , , ,C ##size size fraction, , , , , , , ,N ##Fe/Ca Iron/Calcium ratio, , , , , , , ,N ##Mg/Ca Magnesium/Calcium ratio, , , , , , , ,N ##Mn/Ca Manganese/Calcium ratio, , , , , , , ,N ##Sr/Ca Strontium/Calcium ratio, , , , , , , ,N ##d13CPDB delta13C, , , per mil PDB, , , , ,N ##d18OPDB delta18O, , , per mil PDB, , , , ,N # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # core lat long water-depth species size Fe/Ca Mg/Ca Mn/Ca Sr/Ca d13CPDB d18OPDB V29-178 42.85 -25.15 3448 G. inflata 355-425 0.02 1.46 0.00 1.37 0.961 1.172 V29-178 42.85 -25.15 3448 G. inflata 355-425 0.01 1.38 0.00 1.35 1.07 1.286 V30-97 41 -32.93 3371 G. inflata 355-425 -0.04 1.13 0.00 1.35 1.008 1.127 V30-97 41 -32.93 3371 G. inflata 355-425 0.00 1.32 0.00 1.34 1.083 1.231 V30-96 39.95 -33.13 3188 G. inflata 355-425 -0.06 1.20 0.01 1.35 0.949 0.938 V30-96 39.95 -33.13 3188 G. inflata 355-425 -0.10 1.32 0.01 1.37 VM27-267 35.633 -44.283 4722 1.018 0.934 VM27-267 35.633 -44.283 4722 1.108 0.876 V27-263 35.02 -40.92 3704 G. inflata 355-425 -0.04 1.64 0.00 1.38 0.802 0.871 V27-263 35.02 -40.92 3704 G. inflata 355-425 -0.02 1.55 0.00 1.36 0.884 0.889 V27-161 33.583 -13.967 4446 G. inflata 355-425 -0.11 1.34 -0.02 1.37 0.915 1.135 V27-161 33.583 -13.967 4446 G. inflata 355-425 -0.11 1.17 -0.02 1.33 0.784 1.106 V17-165 32.75 -41.9 3924 G. inflata 355-425 -0.01 1.51 1.39 0.672 0.935 V17-165 32.75 -41.9 3924 G. inflata 355-425 -0.01 1.34 1.38 0.779 0.78 V27-261 31.37 -35.983 3253 G. inflata 355-425 0.02 1.61 1.43 V27-261 31.37 -35.983 3253 G. inflata 355-425 0.02 1.66 1.40 V19-308 29.02 -41.4 3197 G. inflata 355-425 0.00 1.65 1.42 0.933 0.765 V19-308 29.02 -41.4 3197 G. inflata 355-425 0.01 1.86 1.42 0.396 0.9 V22-219 27.92 -43.63 2582 G. inflata 355-425 0.10 1.88 1.46 V22-219 27.92 -43.63 2582 G. inflata 355-425 0.00 1.80 1.44 V20-244 26 -48.267 3953 G. inflata 355-425 0.02 1.77 0.02 1.45 0.744 1.43 V20-244 26 -48.267 3953 G. inflata 355-425 0.831 1.543 V10-93 24.2 -47.467 3574 G. inflata 355-425 0.04 2.02 0.05 1.48 0.994 1.546 V16-206 23.333 -46.483 3733 G. inflata 355-425 0.00 2.08 0.03 1.55 0.433 1.332 V16-206 23.333 -46.483 3733 G. inflata 355-425 0.859 1.393 RC13-210 -9.13 -10.6 3658 G. inflata 355-425 0.19 1.96 0.04 1.31 0.705 1.442 RC13-210 -9.13 -10.6 3658 G. inflata 355-425 0.688 1.669 RC16-77 -12.7 -13.4 3400 G. inflata 355-425 0.19 2.16 0.03 1.38 0.712 1.339 RC16-77 -12.7 -13.4 3400 G. inflata 355-425 0.04 2.16 0.02 1.38 0.77 1.375 V22-169 -16.25 -5.733 3499 G. inflata 355-425 0.11 2.23 0.04 1.43 V22-169 -16.25 -5.733 3499 G. inflata 355-425 0.12 2.26 0.04 1.44 V16-35 -17.65 -15.1 3891 G. inflata 355-425 0.727 1.254 V16-35 -17.65 -15.1 3891 G. inflata 355-425 0.828 1.312 V16-36 -19.37 -11.43 3329 G. inflata 355-425 0.10 2.29 0.10 1.43 0.811 1.184 V16-36 -19.37 -11.43 3329 G. inflata 355-425 0.07 2.38 0.10 1.44 0.706 1.154 V16-37 -21.33 -8.95 3908 G. inflata 355-425 0.13 2.01 0.05 1.41 0.624 1.281 V16-37 -21.33 -8.95 3908 G. inflata 355-425 0.12 1.98 0.05 1.42 0.869 1.278 RC8-18 -24.07 -15.12 3977 G. inflata 355-425 0.03 1.61 0.02 1.44 1.289 1.66 RC8-18 -24.07 -15.12 3977 G. inflata 355-425 0.05 1.69 0.01 1.46 1.057 1.496 RC8-19 -24.3 -14.7 3640 G. inflata 355-425 0.06 1.89 0.03 1.46 1.112 1.364 RC8-19 -24.3 -14.7 3640 G. inflata 355-425 0.06 2.25 0.02 1.51 1.124 1.526 RC8-23 -25.15 -12.77 3338 G. inflata 355-425 0.02 1.73 0.01 1.44 1.009 1.545 RC8-23 -25.15 -12.77 3338 G. inflata 355-425 0.01 1.84 0.01 1.47 1.131 1.743