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  • Data  (12)
  • 2015-2019  (12)
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  • 1
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    Sedimentary protactinium / thorium and opal in sediment core MD09-3257 from Western Equatorial Atlantic (2018)
    PANGAEA
    In:  Supplement to: Waelbroeck, Claire; Pichat, Sylvain; Böhm, Evelyn; Lougheed, Bryan C; Faranda, Davide; Vrac, Mathieu; Missiaen, Lise; Vázquez Riveiros, Natalia; Burckel, Pierre; Lippold, Jörg; Arz, Helge Wolfgang; Dokken, Trond; Thil, François; Dapoigny, Arnaud (2018): Relative timing of precipitation and ocean circulation changes in the western equatorial Atlantic over the last 45 kyr. Climate of the Past, 14(9), 1315-1330, https://doi.org/10.5194/cp-14-1315-2018
    Details
    Publication Date: 2023-01-13
    Description: Thanks to its optimal location on the northern Brazilian margin, core MD09-3257 records both ocean circulation and atmospheric changes. The latter occur locally in the form of increased rainfall on the adjacent continent during the cold intervals recorded in Greenland ice and northern North Atlantic sediment cores (i.e. Greenland stadials). These rainfall events are recorded in MD09-3257 as peaks in ln(Ti/Ca). New sedimentary Pa/Th data indicate that mid-depth western equatorial water mass transport decreased during all of the Greenland stadials of the last 40 kyr. Using cross-wavelet transforms and spectrogram analysis, we assess the relative phase between the MD09-3257 sedimentary Pa/Th and ln(Ti/Ca) signals. We show that decreased water mass transport between a dept of ~1300 and 2300 m in the western equatorial Atlantic preceded increased rainfall over the adjacent continent by 120 to 400 y at Dansgaard-Oeschger (D-O) frequencies, and by 280 to 980 y at Heinrich-like frequencies. We suggest that the large lead of ocean circulation changes with respect to changes in tropical South American precipitation at Heinrich-like frequencies is related to the effect of a positive feedback involving iceberg discharges in the North Atlantic. In contrast, the absence of widespread ice rafted detrital layers in North Atlantic cores during D-O stadials supports the hypothesis that a feedback such as this was not triggered in the case of D-O stadials, with circulation slowdowns and subsequent changes remaining more limited during D-O stadials than Heinrich stadials.
    Type: Dataset
    Format: application/zip, 6 datasets
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    DATA PANGAEA
  • 2
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    Age model of sediment core MD09-3257 (2018)
    PANGAEA
    Details
    Publication Date: 2023-03-02
    Keywords: AGE; Age, error; CALYPSO; Calypso Corer; DEPTH, sediment/rock; Marion Dufresne (1995); MD09-3257; MD173; RETRO-2; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 466 data points
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    DATA PANGAEA
  • 3
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    Opal in sediment core MD09-3257 (2018)
    PANGAEA
    Details
    Publication Date: 2023-03-02
    Keywords: AGE; Age, error; CALYPSO; Calypso Corer; DEPTH, sediment/rock; Marion Dufresne (1995); MD09-3257; MD173; Opal, biogenic silica; Opal, biogenic silica, standard deviation; Opal, flux; Opal, flux, standard deviation; Reference/source; RETRO-2; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 156 data points
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  • 4
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    Age determination of sediment core MD09-3257 (2018)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Keywords: Age, 14C calibrated, OxCal 4.2 and IntCal13; Age, comment; Age, dated; Age, dated standard deviation; Age, error; Age model; Calendar age; Calendar age, standard deviation; CALYPSO; Calypso Corer; DEPTH, sediment/rock; Laboratory code/label; Marion Dufresne (1995); MD09-3257; MD173; Reservoir age; Reservoir age, standard error; RETRO-2; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 160 data points
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  • 5
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    Tube growth data of Spirorbis spirorbis in benthocosm experiments (2018)
    PANGAEA
    In:  Supplement to: Ni, Sha; Taubner, Isabelle; Böhm, Florian; Winde, Vera; Böttcher, Michael Ernst (2018): Effect of temperature rise and ocean acidification on growth of calcifying tubeworm shells (pirorbis spirorbis): an in situ benthocosm approach. Biogeosciences, 15(5), 1425-1445, https://doi.org/10.5194/bg-15-1425-2018
    Details
    Publication Date: 2023-11-18
    Description: Tube extension and corrosion data of the tubeworm Spirorbis spirorbis grown in benthic mesocosm experiments in the Kiel Outdoor Benthocosm facilities (Geomar, Kiel, Germany, Western Baltic Sea) in 2013 and 2014.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 6
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    Tube growth data of Spirorbis spirorbis in benthocosm experiments: shell corrosion (2018)
    PANGAEA
    Details
    Publication Date: 2023-11-18
    Description: The data set comprises 4 experimental runs: spring experiment (4.4.-19.6.2013), summer experiment 1 (4.7.-17.9.2013), autumn experiment (10.10-17.12.2013), winter experiment (16.1. - 1.4.2014).
    Keywords: Benthocosm_A1; Benthocosm_A2; Benthocosm_B1; Benthocosm_B2; Benthocosm_C1; Benthocosm_C2; Benthocosm_D1; Benthocosm_D2; Benthocosm_E1; Benthocosm_E2; Benthocosm_F1; Benthocosm_F2; BIOACID; Biological Impacts of Ocean Acidification; Corrosion; Event label; Experiment; Experimental treatment; Kiel Fjord; MESO; Mesocosm experiment; Species
    Type: Dataset
    Format: text/tab-separated-values, 234 data points
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  • 7
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    Tube growth data of Spirorbis spirorbis in benthocosm experiments: tube width (2018)
    PANGAEA
    Details
    Publication Date: 2023-11-18
    Description: The data set comprises 2 experimental runs: summer experiment 1 (4.7.-17.9.2013), autumn experiment (10.10-17.12.2013).
    Keywords: Benthocosm_B1; Benthocosm_B2; Benthocosm_D1; Benthocosm_D2; Benthocosm_F1; Benthocosm_F2; BIOACID; Biological Impacts of Ocean Acidification; Event label; Experiment; Experimental treatment; Kiel Fjord; MESO; Mesocosm experiment; Species; Width
    Type: Dataset
    Format: text/tab-separated-values, 2405 data points
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  • 8
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    Tube growth data of Spirorbis spirorbis in benthocosm experiments: growth and diameter (2018)
    PANGAEA
    Details
    Publication Date: 2023-11-18
    Description: The data set comprises 4 experimental runs: spring experiment (4.4.-19.6.2013), summer experiment 1 (4.7.-17.9.2013), autumn experiment (10.10-17.12.2013), winter experiment (16.1. - 1.4.2014).
    Keywords: Benthocosm_A1; Benthocosm_A2; Benthocosm_B1; Benthocosm_B2; Benthocosm_C1; Benthocosm_C2; Benthocosm_D1; Benthocosm_D2; Benthocosm_E1; Benthocosm_E2; Benthocosm_F1; Benthocosm_F2; BIOACID; Biological Impacts of Ocean Acidification; Diameter; Event label; Experiment; Experimental treatment; Growth; Kiel Fjord; MESO; Mesocosm experiment; Ratio; Species
    Type: Dataset
    Format: text/tab-separated-values, 23098 data points
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  • 9
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    Radionuclides, Nd isotopes and biogenic Opal in Atlanic Ocean sediments (2016)
    PANGAEA
    In:  Supplement to: Lippold, Jörg; Gutjahr, Marcus; Blaser, Patrick; Christner, Emanuel; de Carvalho, Maria Luiza; Mulitza, Stefan; Christl, Marcus; Wombacher, Frank; Böhm, Evelyn; Antz, Benny; Cartapanis, Olivier; Vogel, Hendrik; Jaccard, Samuel L (2016): Deep water provenance and dynamics of the (de)glacial Atlantic meridional overturning circulation. Earth and Planetary Science Letters, 445, 68-78, https://doi.org/10.1016/j.epsl.2016.04.013
    Details
    Publication Date: 2024-02-02
    Description: Reconstructing past modes of ocean circulation is an essential task in paleoclimatology and paleoceanography. To this end, we combine two sedimentary proxies, Nd isotopes (epsilon-Nd) and the 231Pa/230Th ratio, both of which are not directly involved in the global carbon cycle, but allow the reconstruction of water mass provenance and provide information about the past strength of overturning circulation, respectively. In this study, combined 231Pa/230Th and epsilon-Nd down-core profiles from six Atlantic Ocean sediment cores are presented. The data set is complemented by the two available combined data sets from the literature. From this we derive a comprehensive picture of spatial and temporal patterns and the dynamic changes of the Atlantic Meridional Overturning Circulation over the past ~25 ka. Our results provide evidence for a consistent pattern of glacial/stadial advances of Southern Sourced Water along with a northward circulation mode for all cores in the deeper (〉3000 m) Atlantic. Results from shallower core sites support an active overturning cell of shoaled Northern Sourced Water during the LGM and the subsequent deglaciation. Furthermore, we report evidence for a short-lived period of intensified AMOC in the early Holocene.
    Keywords: 177-1089A; 177-1089B; 306-U1313B; AGE; Amazon Fan; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Exp306; GeoB1515-1; GeoB1523-1; Gravity corer (Kiel type); Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Knorr; KNR140; KNR140-12JPC; KNR140-2-12JPC; Latitude of event; Leg177; Longitude of event; M16/2; M35/1; M35003-4; Meteor (1986); North Atlantic Climate 2; Ocean Drilling Program; ODP; Opal, biogenic silica; Opal, biogenic silica, error; PC; Piston corer; Protactinium-231; Protactinium-231, error, relative; Protactinium-231/Thorium-230 activity ratio; Protactinium-231/Thorium-230 activity ratio, error; Reference/source; Sample code/label; SL; South Atlantic Ocean; Thorium-230; Thorium-230, error, relative; Thorium-232; Thorium-232, error, relative; Uranium-238; Uranium-238, error, relative; ε-Neodymium; ε-Neodymium, error
    Type: Dataset
    Format: text/tab-separated-values, 2315 data points
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  • 10
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    Protactinium, thorium and uranium activities and ratios in sediment cores MD09-3257 and GeoB3910-2 (2018)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: AGE; Age, error; CALYPSO; Calypso Corer; DEPTH, sediment/rock; Event label; GeoB3910-2; Gravity corer (Kiel type); M34/4; Marion Dufresne (1995); MD09-3257; MD173; Meteor (1986); Northeast Brasilian Margin; Protactinium-231; Protactinium-231, standard deviation; Protactinium-231/Thorium-230 ratio; Protactinium-231/Thorium-230 ratio, standard deviation; Protactinium-231 excess; Protactinium-231 excess, decay-corrected; Reference/source; RETRO-2; SL; South Atlantic Ocean; Thorium-230; Thorium-230, standard deviation; Thorium-230 excess; Thorium-230 excess, decay-corrected; Thorium-232; Thorium-232, flux; Thorium-232, standard deviation; Total, flux per year; Uranium-238; Uranium-238, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 2034 data points
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