# Central and Southern Atlantic Ocean benthic foraminiferal Mg/Ca, DCO2-3 and BWT Data from core top samples #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/22277 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/weldeab2016-epsl/weldeab2016-epsl-dco23-bw.txt # Description: NOAA location of the template # # Archive: Paleoceanography # # Parameter_Keywords: trace metals in carbonates, reconstruction #--------------------------------------- # Contribution_Date # Date: 2017-06-28 #--------------------------------------- # File_Last_Modified_Date # Date: 2017-06-28 #--------------------------------------- # Title # Study_Name: Central and Southern Atlantic Ocean benthic foraminiferal Mg/Ca, DCO2-3 and BWT Data from core top samples #--------------------------------------- # Investigators # Investigators: Weldeab, S.; Arce, A.; Kasten, S. #--------------------------------------- # Description_Notes_and_Keywords # Description: benthic foramineral Mg/Ca-temperature calibration using Rose Bengel stained core top samples # Provided Keywords: pore water chemistry, bottom water calibration #--------------------------------------- # Publication # Authors: Weldeab, S., A. Arce, and S. Kasten # Published_Date_or_Year: 2016 # Published_Title: Mg/Ca-DCO2-3 pore-water -temperature calibration for Globobulimina spp.: A sensitive paleothermometer for deep-sea temperature reconstruction # Journal_Name: Earth and Planetary Science Letters # Volume: 438 # Edition: # Issue: # Pages: 95-102 # Report Number: # DOI: 10.1016/j.epsl.2016.01.009 # Online_Resource: # Full_Citation: # Abstract: Existing benthic foraminiferal Mg/Ca-temperature calibrations are surrounded by substantial uncertainties mainly due to low temperature sensitivity of Mg/Ca in most benthic foraminifers and the effect of carbonate ion concentration on benthic foraminiferal Mg/Ca. Here we present Mg/Ca analysis of Rose Bengal stained and exceptionally well-preserved tests of the infaunal benthic foraminifer Globobulimina spp. from 39 eastern equatorial Atlantic core top samples. Mg/Ca in Globobulimina spp. varies between 2.5 mmol/mol and 9.1 mmol/mol corresponding to bottom water temperatures (BWT) between 1.8? and 19.1? and ??CO?_(3 pore water)^(2-) between 33.7±4 and -34.3±4 µmol/kg in sediment depths between 1 and 10 cm. Mg/Ca and BWT are linearly correlated with a best fit of Mg/Ca[mmol/mol]=(0.36±0.02)*BWT[°C]+2.22±0.19 (r2=0.92, p: 11*10-20, and n=39). Using total alkalinity and pH data of pore water samples from 64 Atlantic multi-corer sites, we obtained ??CO?_(3 pore water)^(2-)data from the depth habitat range of Globobulimina spp. (= 1 cm = 10 cm below sediment surface). We show that ??CO?_(3 pore water)^(2-) is significantly lower than and linearly co-varies with the ??CO?_3^(2-) of the overlying bottom water: ??CO?_(3 pore water)^(2-)=(0.67±0.05)*??CO?_(3 bottom water)^(2-)-(39.84±1.98); r2=0.75, p: 6*10-20, n=64. We found a Mg/Ca sensitivity of 0.009±0.0044 mmol/mol per µmol/kg ??CO?_(3 pore water)^(2-) and Mg/Ca temperature sensitivity of 0.32 ±0.06 mmol/mol/°C after a correction for the ??CO?_(3 pore water)^(2-) effect. This study provides a robust Mg/Ca-temperature calibration, highlights that ??CO?_(3 pore water)^(2-) is spatially and most likely temporally variable, and contradicts the notion that infaunal foraminiferal Mg/Ca is relatively immune from ??CO?_(3 )^(2-) changes in the overlying bottom water. Furthermore, comparison of down core Mg/Ca data of Cibicides pachyderma and Globobulimina spp. demonstrates that the high temperature sensitivity of Mg/Ca in Globobulimina spp. presents a more robust paleothermometer to reconstruct past changes in the thermal state of the deep ocean. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: National Science Foundation # Grant: OCE 1260690 #--------------------------------------- # Site Information # Site_Name: Central and Southern Atlantic Ocean # Location: Atlantic Ocean # Country: # Northernmost_Latitude: 30.1933 # Southernmost_Latitude: -44.455 # Easternmost_Longitude: 14.005 # Westernmost_Longitude: -54.2583 # Elevation: #--------------------------------------- # Data_Collection # Collection_Name: Central Atlantic DCO23-bw Weldeab16-EPSL # First_Year: # Last_Year: # Time_Unit: # Core_Length: 0.009 # Notes: This is a collection of multi-corer samples #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab- 10 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data,additional info ## core core name,,,,,paleoceanography,,,C, ## lat latitude,,,degrees North,,paleoceanography,,,N, ## lon longitude,,,degrees East,,paleoceanography,,,N, ## waterdep water depth,,,m,,paleoceanography,,,N, ## DCO23-bw DeltaCO2-3,bottom water,,µmol/kg,,paleoceanography,,,N,0 cm sediment depth ## DCO23-pw-avg DeltaCO2-3,pore water,,µmol/kg,,paleoceanography,,,N,=1 =10 cm sediment depth ## DCO23-dev DeltaCO2-3,,,µmol/kg,,paleoceanography,,,N,deviation from average DCO32 values ## notes notes,,,,,,,,C, #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NA core lat lon waterdep DCO23-bw DCO23-pw-avg DCO23-dev notes GeoB4211-1 30.19 -10.82 1773 75.15 7.33 4.14 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105979 GeoB4228-1 29.47 -12.99 1633 62.96 20.02 2.70 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.106006 GeoB4241-5 29.17 -15.45 3610 31.77 -17.12 4.41 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.106033 GeoB4231-2 29.09 -12.56 1207 71.93 19.68 4.50 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.106011 GeoB4234-1 28.89 -13.23 1360 107.45 20.77 5.40 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.106022 GeoB4420-1 16.47 -46.46 2763 49.95 4.08 6.42 Reference for pH and alkalinity data: Kasten (2004): doi:10.1594/PANGAEA.219430 GeoB4419-5 9.68 -54.26 4515 5.09 -54.68 3.15 Reference for pH and alkalinity data: Kasten (2004): doi:10.1594/PANGAEA.219429 GeoB4418-2 9.26 -54.06 2490 43.18 -43.11 2.19 Reference for pH and alkalinity data: Kasten (2004): doi:10.1594/PANGAEA.222555 GeoB4402-3 6.39 -43.44 4641 13.57 -51.51 2.44 Reference for pH and alkalinity data: Kasten (1998): doi:10.1594/PANGAEA.53193 GeoB4404-2 6.06 -43.74 4397 26.92 -39.37 1.58 Reference for pH and alkalinity data: Kasten (1998): doi:10.1594/PANGAEA.53195 GeoB4405-2 5.91 -43.75 4300 28.48 -37.99 4.28 Reference for pH and alkalinity data: Kasten (1998): doi:10.1594/PANGAEA.53197 GeoB4412-3 5.72 -44.36 3764 21.35 -32.76 1.35 Reference for pH and alkalinity data: Kasten (2004): doi:10.1594/PANGAEA.219425 GeoB4416-2 5.68 -45.09 3903 8.79 -36.67 1.76 Reference for pH and alkalinity data: Kasten (1998): doi:10.1594/PANGAEA.53209 GeoB4417-5 5.14 -46.58 3511 41.19 -22.07 3.49 Reference for pH and alkalinity data: Kasten (1998): doi:10.1594/PANGAEA.53211 GeoB4401-3 4.79 -43.46 3396 65.57 0.59 2.10 Reference for pH and alkalinity data: Kasten (1998): doi:10.1594/PANGAEA.53191 GeoB4407-2 3.82 -41.62 3306 43.67 -11.28 0.87 Reference for pH and alkalinity data: Kasten (1998): doi:10.1594/PANGAEA.53201 GeoB4408-3 3.67 -46.13 3466 49.26 -17.09 1.66 Reference for pH and alkalinity data: Kasten (2004): doi:10.1594/PANGAEA.219423 GeoB2909-1 0.50 -21.63 4383 28.92 -33.34 3.81 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105633 GeoB2908-8 0.11 -23.32 3815 40.11 -17.24 2.46 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105625 GeoB3908-11 -0.01 -23.43 3693 -5.24 -43.20 2.01 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105625 GeoB2906-3 -0.41 -27.25 3870 42.44 -3.00 7.04 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105610 GeoB2907-1 -0.43 -25.51 3675 31.29 -19.80 6.68 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105610 GeoB2905-1 -0.66 -28.64 4166 48.62 -17.22 5.93 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105610 GeoB3914-3 -2.73 -38.23 2461 42.62 14.00 11.76 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105944 GeoB2904-11 -4.06 -25.66 5579 -50.93 -78.37 5.29 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105588 GeoB3911-1 -4.61 -36.64 826 31.31 -5.11 3.12 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105928 GeoB2903-1 -7.55 -28.03 5637 -51.19 -65.38 3.66 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105581 GeoB3713-1 -15.63 11.58 1330 23.93 -8.99 8.23 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105764 GeoB3715-2 -18.96 11.06 1203 -8.54 -28.34 2.80 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105783 GeoB2125-2 -20.82 -39.86 1542 51.76 -4.23 3.34 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105454 GeoB2119-2 -21.73 -38.55 2958 36.24 -22.98 5.52 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105452 GeoB3706-3 -22.72 12.60 1313 14.10 -19.96 1.19 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105711 GeoB2117-4 -23.04 -36.65 4047 11.35 -51.31 1.71 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105450 GeoB3705-3 -24.30 13.00 1308 14.10 -13.75 2.04 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105704 GeoB3717-2 -24.83 13.36 858 26.12 -16.51 2.38 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105789 GeoB3718-4 -24.90 13.16 1316 1.64 -21.69 0.52 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105795 GeoB3719-2 -25.00 12.87 1995 10.01 -28.88 1.69 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105807 GeoB3721-4 -25.15 12.40 3014 0.00 -38.31 1.84 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105813 GeoB8462-4 -25.45 12.95 2293 53.46 -11.08 3.35 Reference for pH and alkalinity data: Hensen (2003):doi:10.1594/PANGAEA.105813 GeoB3704-2 -25.47 13.08 1780 30.99 -8.29 2.37 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105697 GeoB8449-1 -25.48 13.55 605 12.71 -12.66 0.74 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105813 GeoB3724-3 -26.14 8.93 4766 -17.24 -56.83 9.79 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105824 GeoB3825-1 -26.23 -36.33 4279 -14.85 -62.90 2.39 Reference for pH and alkalinity data: Hensen, Kasten (2003): doi:10.1594/PANGAEA.105887 GeoB3702-2 -26.79 13.46 1319 23.97 -15.14 2.67 Reference for pH and alkalinity data: Hensen (2003): doi:10.1594/PANGAEA.105676 GeoB3822-1 -27.63 -37.95 4273 -40.20 -60.34 2.64 Reference for pH and alkalinity data: Hensen, Kasten (2003): doi:10.1594/PANGAEA.105881 GeoB3701-1 -27.95 14.01 1488 15.24 -14.03 2.46 Reference for pH and alkalinity data: Hensen (2003):doi:10.1594/PANGAEA.105669 GeoB1722-2 -29.45 11.75 3974 28.64 -22.18 2.65 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105417 GeoB3801-5 -29.51 -8.30 4545 -20.40 -66.27 7.23 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105417 GeoB3803-1 -30.35 -8.57 4173 -11.39 -38.37 17.02 Reference for pH and alkalinity data: Hensen, Kasten (2003): doi:10.1594/PANGAEA.105843 GeoB3812-2 -31.62 -19.76 4204 -23.25 -55.65 2.87 Reference for pH and alkalinity data: Hensen, Kasten (2003): doi:10.1594/PANGAEA.105876 GeoB2824-1 -33.50 -42.50 4512 -22.53 -71.30 10.22 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105524 GeoB2812-3 -35.60 -52.39 1041 41.87 3.28 7.46 Reference for pH and alkalinity data: Hensen, Haese, Zabel (2003): doi:10.1594/PANGAEA.105511 GeoB2810-2 -35.98 -51.98 2909 23.97 -20.13 16.73 Reference for pH and alkalinity data: Hensen, Haese, Zabel (2003): doi:10.1594/PANGAEA.105508 GeoB2809-2 -36.33 -51.52 3539 0.00 -36.51 9.05 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105506 GeoB2730-1 -44.48 -53.25 5817 -51.19 -82.64 12.00 Reference for pH and alkalinity data: Hensen, Zabel (2003):doi:10.1594/PANGAEA.105494 GeoB4916-3 -10.17 12.69 1294 19.53 -23.57 4.76 Reference for pH and alkalinity data: Hensen, Zabel (2003): doi:10.1594/PANGAEA.105494 GeoB4915-2 -7.75 11.87 1306 21.99 -25.81 2.65 Reference for pH and alkalinity data: this study GeoB4913-3 -5.50 11.07 1296 37.02 -19.09 17.01 Reference for pH and alkalinity data: this study GeoB4912-3 -3.73 9.79 1298 19.53 -18.20 2.44 Reference for pH and alkalinity data: this study GeoB4908-3 -0.71 6.84 3028 12.87 -36.04 3.78 Reference for pH and alkalinity data: this study GeoB4906-4 -0.69 8.38 1272 20.54 -17.90 7.59 Reference for pH and alkalinity data: this study GeoB4904-6 0.96 8.88 1349 19.65 -19.40 1.19 Reference for pH and alkalinity data: this study GeoB4903-2 1.92 8.17 2385 35.76 -32.89 6.37 Reference for pH and alkalinity data: this study