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  • 1
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    The seawater neodymium and lead isotope record of the final stages of Central American Seaway closure (2014)
    In:  EPIC3Paleoceanography, 29(7), pp. 715-729, ISSN: 08838305
    Details
    Publication Date: 2016-12-18
    Description: The shoaling and final closure of the Central American Seaway (CAS) resulted in a major change of the global ocean circulation and has been suggested as an essential driver for strengthening of Atlantic Meridional Overturning Circulation (AMOC). The exact timing of CAS closure is key to interpreting its importance. Here we present a reconstruction of deep and intermediate water Nd and Pb isotope compositions obtained from fossil fish teeth and the authigenic coatings of planktonic foraminifera in the eastern equatorial Pacific (Ocean Drilling Program (ODP) Site 1241) and the Caribbean (ODP Sites 998, 999, and 1000) covering the final stages of CAS closure between 5.6 and 2.2 Ma. The data for the Pacific site indicate no significant Atlantic/Caribbean influence over this entire period. The Caribbean sites show a continuous trend to less radiogenic Nd isotope compositions during the Pliocene, consistent with an enhancement of Upper North Atlantic Deep Water (UNADW) inflow and a strengthening of the AMOC. Superimposed onto this long-term trend, shorter-term changes of intermediate Caribbean Nd isotope signatures approached more UNADW-like values during intervals when published reconstructions of seawater salinity suggested complete closure of the CAS. The data imply that significant deep water exchange with the Pacific essentially stopped by 7 Ma and that shallow exchange, which still occurred at least periodically until approximately 2.5 Ma, may have been linked to the strength of the AMOC but did not have any direct effect on the intermediate and deep Caribbean Nd isotope signatures through mixing with Pacific waters.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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    PAPER (OA)
  • 2
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    (Table 2) Mn/Ca and Nd/Ca ratios of planktonic foraminifera from sediment core MD81-LC21
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: CALYPSO; Calypso Corer; DEPTH, sediment/rock; ICP-MS, Thermo Finnigan, Element 2; LC21, LC-21; Manganese/Calcium ratio; Marion Dufresne (1995); MD81; MD81-LC21; Mediterranean Sea; Neodymium/Calcium ratio; PALAEOFLUX
    Type: Dataset
    Format: text/tab-separated-values, 70 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Neodymium isotopic record of planktonic foraminifera in sediment core MD81-LC21
    PANGAEA
    In:  Supplement to: Osborne, Anne H; Marino, Gianluca; Vance, Derek; Rohling, Eelco J (2010): Eastern Mediterranean surface water Nd during Eemian sapropel S5: monitoring northerly (mid-latitude) versus southerly (sub-tropical) freshwater contributions. Quaternary Science Reviews, 29(19-20), 2473-2483, https://doi.org/10.1016/j.quascirev.2010.05.015
    Details
    Publication Date: 2023-06-27
    Description: A well developed sapropel (S5) was deposited in the eastern Mediterranean during the Last Interglacial (Eemian), 124-119 ka. Freshwater contributions to the basin at this time can be traced using the isotopic composition of Nd in planktonic foraminifera. This enables differentiation between radiogenic sources to the south, under the influence of the African monsoon, and unradiogenic sources to the north, relating to the mid-latitude westerlies. Here we compare new Nd data, from a core in the southeast Aegean Sea, with published data from the Ionian and Levantine Seas. Shifts towards more radiogenic Nd in the lower and middle parts of sapropel S5 are most pronounced in the Ionian Sea record, with epsioln-Nd and d18O G. ruber co-varying more closely here than in the Levantine and Aegean Seas. This is consistent with a freshwater source proximal to the Ionian Sea site, likely indicating a substantial reactivation of rivers flowing northward from the central Saharan watershed. The lack, during S5 deposition, of a noticeable shift towards more unradiogenic Nd in the Aegean record would exclude a large influx of water from the northern borders of the eastern Mediterranean during sapropel deposition. These findings support a scenario whereby the Last Interglacial eastern Mediterranean was influenced strongly by the remote effects of an intensified African monsoon, with more local precipitation in the northern borders contributing relatively little to the sea surface composition.
    Keywords: CALYPSO; Calypso Corer; LC21, LC-21; Marion Dufresne (1995); MD81; MD81-LC21; Mediterranean Sea; PALAEOFLUX
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    (Table 1) Nd and Sm istopic record of planktonic foraminifera from sediment core MD81-LC21
    PANGAEA
    Details
    Publication Date: 2023-07-05
    Keywords: CALYPSO; Calypso Corer; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; ICP-MS, Thermo Finnigan, Element 2; LC21, LC-21; Marion Dufresne (1995); MC-ICP-MS Thermo-Finnigan Neptune; MD81; MD81-LC21; Mediterranean Sea; Neodymium; PALAEOFLUX; Samarium-147/Neodymium-144 ratio; ε-Neodymium; ε-Neodymium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 67 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Neodymium isotopes and concentrations in Caribbean seawater during METEOR cruise M78/1 (2014)
    PANGAEA
    In:  Supplement to: Osborne, Anne H; Haley, Brian A; Hathorne, Ed C; Flögel, Sascha; Frank, Martin (2014): Neodymium isotopes and concentrations in Caribbean seawater: Tracing water mass mixing and continental input in a semi-enclosed ocean basin. Earth and Planetary Science Letters, 406, 174-186, https://doi.org/10.1016/j.epsl.2014.09.011
    Details
    Publication Date: 2023-10-28
    Description: Neodymium isotopes and concentrations from 11 stations in the Caribbean, Gulf of Mexico, Florida Straits and close to the mouth of the Orinoco. CTD data (potential temperature, salinity, potential density and oxygen concentration) for the same samples are also reported. Sampling took place during February and March 2009 as part of the Meteor Cruise 78, Leg 1.
    Keywords: 162-1; 164-1; 166-1; 194-13; 200-2; 220-1; 222-1; 236-1; 246-1; 247-1; 249-1; Boca Grande Orinoco; BUCKET; Bucket water sampling; Climate - Biogeochemistry Interactions in the Tropical Ocean; Comment; CTD/Rosette; CTD-RO; Date/Time of event; Density, sigma-theta (0); DEPTH, water; E. Tobago, Prospector Slope; Elevation of event; Event label; Florida Straits; Latitude of event; Longitude of event; M78/1; M78/1_162-1; M78/1_164-1; M78/1_166-1; M78/1_194-13; M78/1_200-2; M78/1_220-1; M78/1_222-1; M78/1_236-1; M78/1_246-1; M78/1_247-1; M78/1_249-1; Meteor (1986); Neodymium, dissolved; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; Oxygen; Plankton station 1; Plankton station 2; Plankton station 4; Plankton station 7; Salinity; SFB754; Temperature, water, potential; W. Yucatan Channel; Water bodies; W-Florida Slope; ε-Neodymium; ε-Neodymium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 723 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Rare earth element (REE) concentrations of full water column profiles from the Caribbean, the Gulf of Mexico, and the Florida Straits, and surface waters close to the mouth of the Orinoco River during METEOR cruise M78/1 (2016)
    PANGAEA
    In:  Supplement to: Osborne, Anne H; Haley, Brian A; Hathorne, Ed C; Plancherel, Yves; Frank, Martin (2015): Rare earth element distribution in Caribbean seawater: Continental inputs versus lateral transport of distinct REE compositions in subsurface water masses. Marine Chemistry, 177, 172-183, https://doi.org/10.1016/j.marchem.2015.03.013
    Details
    Publication Date: 2023-12-01
    Description: REE concentrations in filtered seawater collected during research cruise M78/1, February and March 2009 and CTD data (potential temperature, salinity, potential density and oxygen concentration) and water mass assignment for the same samples.
    Keywords: 162-1; 164-1; 166-1; 182-1; 194-13; 200-2; 220-1; 222-1; 226-3; 236-1; 246-1; 247-1; 249-1; Analytical method; Boca Grande Orinoco; BUCKET; Bucket water sampling; Cerium; Cerium anomaly; Comment; CTD/Rosette; CTD-RO; Date/Time of event; Density, sigma-theta (0); DEPTH, water; Description; Dysprosium; Dysprosium/Erbium ratio; E. Tobago, Prospector Slope; Elevation of event; Erbium; Europium; Event label; Florida Straits; Gadolinium; Heavy rare-earth elements/light rare-earth elements ratio; Holmium; Isla de Blanquilla; Lanthanum; Latitude of event; Longitude of event; Lutetium; M78/1; M78/1_162-1; M78/1_164-1; M78/1_166-1; M78/1_182-1; M78/1_194-13; M78/1_200-2; M78/1_220-1; M78/1_222-1; M78/1_226-3; M78/1_236-1; M78/1_246-1; M78/1_247-1; M78/1_249-1; Meteor (1986); Middle rare-earth elements anomaly; Mississippi Profile Station 2; Neodymium; Oxygen; Plankton station 1; Plankton station 2; Plankton station 4; Plankton station 7; Praseodymium; Salinity; Samarium; Temperature, water, potential; Terbium; Thulium; W. Yucatan Channel; W-Florida Slope; Ytterbium; Yttrium
    Type: Dataset
    Format: text/tab-separated-values, 2158 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    (Table S2b) Trace element composition of weakly cleaned foraminifera for MIS 95-100 from ODP Site 165-999 (2019)
    PANGAEA
    Details
    Publication Date: 2023-12-09
    Keywords: 165-999; AGE; Aluminium/Calcium ratio; Aluminium/Neodymium ratio; Caribbean Sea; COMPCORE; Composite Core; Depth, composite; Iron; Iron/Calcium ratio; Iron/Manganese ratio; Joides Resolution; Leg165; Manganese; Manganese/Calcium ratio; Sample ID
    Type: Dataset
    Format: text/tab-separated-values, 333 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    (Table S2a) Trace element composition of weakly cleaned foraminifera for MIS M2 from ODP Site 165-999A (2019)
    PANGAEA
    Details
    Publication Date: 2023-12-09
    Keywords: 165-999A; AGE; Aluminium/Calcium ratio; Aluminium/Neodymium ratio; Caribbean Sea; Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Iron; Iron/Calcium ratio; Iron/Manganese ratio; Joides Resolution; Leg165; Manganese; Manganese/Calcium ratio; Sample ID
    Type: Dataset
    Format: text/tab-separated-values, 234 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    (Table S1a) εNd composition of weakly cleaned foraminifera for MIS M2 from ODP Site 165-999A (2019)
    PANGAEA
    Details
    Publication Date: 2023-12-09
    Keywords: 165-999A; AGE; Caribbean Sea; Comment; Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Joides Resolution; Leg165; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; Neodymium-143/Neodymium-144 ratio, standard deviation; Sample ID; ε-Neodymium, error; ε-Neodymium (0); ε-Neodymium (T)
    Type: Dataset
    Format: text/tab-separated-values, 287 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Neodymium isotope, trace- and rare-earth element concentrations in foraminifera from ODP Site 999 (2019)
    PANGAEA
    In:  Supplement to: Osborne, Anne H; Hathorne, Ed C; Böning, Philipp; Groeneveld, Jeroen; Pahnke, Katharina; Frank, Martin (2019): Late Pliocene and Early Pleistocene Variability of the REE and Nd Isotope Composition of Caribbean Bottom Water: A Record of Changes in Sea Level and Terrestrial Inputs During the Final Stages of Central American Seaway Closure. Paleoceanography and Paleoclimatology, 34(12), 2067-2079, https://doi.org/10.1029/2019PA003654
    Details
    Publication Date: 2023-12-09
    Description: Nd-isotope, trace- and rare-earth element concentrations measured in weakly cleaned foraminifera from ODP 999 for two time slices: MIS M2 (Late Pliocene) and MIS 95-100 (Early Pleistocene).
    Keywords: Caribbean; Foraminifera; Nd-isotope; Pleistocene; Pliocene; REE; trace elements
    Type: Dataset
    Format: application/zip, 6 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
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