Köhler, Peter; Mulitza, Stefan: Compilation of marine δ13C and δ18O data arcoss the last 23,000 years [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.994067 (dataset in review)

Global mean ocean δ13C and δ18O across the past 23 kyr is calculated from an updated data compilation. In addition to benthic and planktic stable isotope data from the World Atlas of Foraminifera Carbon and Oxygen Isotopes (Mulitza et al., 2022) our compilation contains 32 data sets from the recent literature and not compiled within the atlas. In total, we included 188 planktic δ13C and 255 benthic δ13C records together with 195 planktic δ18O and 264 benthic δ18O records from 381 cores. The choice of the records was guided by species, sedimentation rate, resolution, coverage of main basins and availability of reliable stratigraphic information (either radiocarbon or a tunable oxygen isotope record). Since we intend to work with anomalies relative to the mid-Holocene, we only included isotope records for which the topmost age is not older than 7 ka. To characterize the surface ocean, we used oxygen and carbon isotope records of the planktic species Globigerinoides ruber for tropical and subtropical latitudes and Neogloboquadrina pachyderma for subpolar and polar latitudes. Benthic isotope values are primarily (>90%) based on epibenthic species of the genera Cibicides/Cibicidoides and Planulina. All original species allocations are preserved in the data sets of the collection. To improve coverage in areas where epibenthic records are not available, we included 12 oxygen isotope records of the genera Uvigerina (9), Melonis (1), Angulogerina (1), Bolivina (1). In a few cases outliers were excluded from further analysis, for example in the case of previously identified tubidites. All replicates within individual records were averaged before further analyses. Both excluded and replicated values were flagged and kept in the data files. In 331 of the 381 cores (86.9%) at least one radiocarbon age have been used for dating. Oxygen isotope stratigraphy was based on visual alignment to the basin-specific oxygen-isotope stacks of Lisiecki and Stern (2016) within the data management software PaleoDataView (Langner & Mulitza, 2019). Continuous age models were obtained with the software Bacon (Blaauw & Christen, 2011) called from PaleoDataView. All ages, the used Bacon parameters and the age models including the age uncertainty are preserved in the netCDF (*.age) files of the PaleoDataView collection deployed in this database. In addition we provide tabulated text files of the raw data (stable isotopes and dates used for age modeling) and the resulting isotope time series of global mean ocean δ13C and δ18O across the past 23 kyr. Furthermore, a spread sheet with metadata and all the related 363 references are included.