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Radiosonde raw data measured during POLARSTERN cruise PS149, links to files
No full textThe meteorological observatory Polarstern continuously performs radiosoundings during times of ship operation. Typically, there is one launch to full altitude at 12 UTC every day. Additionally, there often is a launch with a smaller balloon for forecasting purposes (helicopter operations) around 6 UTC. All data published here is left "as recorded", no quality control was applied
Late Oligocene (26.2-25.2 Ma) radiogenic isotopes (Nd and Pb) from ODP Site 113-689
No full textThis dataset features detrital neodymium (Nd) and authigenic lead (Pb) isotopic compositions from ODP Site 689, Maud Rise (64.5°S, 3.1°E, 2080 m water depth) spanning the late Oligocene (26.2 to 25.2 Ma). The age model was established following the magnetostratigraphic constraints of Florindo and Roberts (2005, doi:10.1130/B25541.1) and tuned to the age model of IODP Site 342-U1406 (van Peer et al., 2024, doi:10.1038/s41467-024-54186-1).
Nd was isolated from the detrital fraction of the sediment via column chromatography using 50W-X8 and LN-Spec resins. Nd concentrations were measured by Thermo Scientific iCAP Triple Quadrupole Inductively Coupled Mass Spectrometry (TQ-ICP-MS) at the University of Heidelberg. Isotopic compositions (eNd) were analysed on a Thermo Scientific Neptune Plus Multi-Collector-ICP-MS at GEOMAR Helmholtz Centre for Ocean Research, Kiel. Isotopic data, expressed as eNd (eNd =[(143Nd/144Nd)/0.512638–1] x 10,000), were normalised to a 143Nd/144Nd value of 0.512115 for the JNdi-1 standard.
Pb was isolated from the authigenic and (selected) detrital fractions of the sediment by ion-chromatography using AG1-X8 resin. Elemental concentrations were also measured by TQ-ICP-MS at the University of Heidelberg and isotopic compositions on a Thermo Scientific Neptune Plus MC-ICP-MS at GEOMAR Kiel
Neodymium isotope of bulk sediment from ODP Sites 181-1123 and 198-1208
No full textThe table presents the 143Nd/144Nd ratios measured from bulk sediment at ODP Sites 181-1123 and 198-1208, together with corresponding sample identifiers, depths, and ages. These ratios were converted to εNd values using a chondritic reference of 143Nd/144Nd = 0.512638. All analyses were conducted using MC-ICP-MS at the State Key Laboratory of Marine Geology, Tongji University
