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Trace Elements of sediment core ML1208-16BB from central equatorial Pacific
No full textQuantitative constraints on deep ocean carbonate chemistry are critical for understanding the processes responsible for glacial-interglacial changes in atmospheric pCO2 and the ocean feedbacks that amplify carbon cycle change. Here, we present a new, millennially-resolved, B/Ca-based record of carbonate ion concentration (∆[CO32-]), measured on C. wullerstorfi, from central equatorial Pacific site ML1208-16BB spanning the last 35 ka. This site, bathed by Pacific Deep Water, reveals a ~24 ± 7 µmol/kg rise in deep ocean [CO32-] between ~20 and 10 ka, a larger change than previously reconstructed from sites in the western equatorial Pacific and those in the central equatorial Pacific bathed by Lower Circumpolar Deep Water
Annotated Southern Ocean diatom LM micrographs from POLARSTERN cruise PS103, 10 p - masked
No full textAnnotated Southern Ocean diatom LM micrographs from POLARSTERN cruise PS103, 10 p - unmasked
No full text
Specific conductivity measured with the dielectric profiling (DEP) technique on the Talos Dome ice core, Antarctica
No full textDielectric Profiling (DEP) of the Talos Dome Ice Core (TALDICE) were recorded in the field during the 2005-2007 field seasons with the DEP device described by Wilhelms et al. (1998). The permittivity and conductivity of DEP data are calculated by their respective densities and conductivities (Wilhelms, 2005). The resolution of DEP data is 5 mm depth intervals. The DEP was not processed at a consistent temperature due to the varying temperature in the field seasons. For more information on the calibration procedure see Mojtabavi et al, 2020
Coccolithophore abundances and CaCO3 concentrations during the 2013 MedSeA mesocosm experiment
No full textMesocosm experiments have been fundamental to investigate the effects of elevated CO2 and ocean acidification (OA) on planktic communities. However, few of these experiments have been conducted using naturally nutrient-limited waters and/or considering the combined effects of OA and ocean warming (OW). Coccolithophores are a group of calcifying phytoplankton that can reach high abundances in the Mediterranean Sea, and whose responses to OA are modulated by temperature and nutrients. We present the results of the first land-based mesocosm experiment testing the effects of combined OA and OW on an oligotrophic Eastern Mediterranean coccolithophore community. Coccolithophore cell abundance drastically decreased under OW and combined OA and OW (greenhouse, GH) conditions. Emiliania huxleyi calcite mass decreased consistently only in the GH treatment; moreover, anomalous calcifications (i.e. coccolith malformations) were particularly common in the perturbed treatments, especially under OA. Overall, these data suggest that the projected increase in sea surface temperatures, including marine heatwaves, will cause rapid changes in Eastern Mediterranean coccolithophore communities, and that these effects will be exacerbated by OA
Interactions on Ligusticum porteri concerning Aphis asclepiadus
No full textData concerning interactions on Aphis asclepiadus' host plant (Ligusticum porteri) during the 2018 growing season and plant quality measurements from specifically tracked plants
Plant and insect herbivore interactions across the late Paleocene-early Eocene boundary, Hanna basin WY
No full textThe data and code provided was used to analyze plant and insect herbivore communities across the late Paleocene-early Eocene boundary within the Hanna Basin, WY
Late Pleistocene to Holocene GDGT data in Mfabeni peat, South Africa
No full textThis data set includes integrated peak areas for all measured GDGTs in two cores from Mfabeni, such as tetra-, penta-, and hexamethylated 5-methyl branched GDGTs as well as isoprenoid GDGTs. The data were used to calculate mean annual air temperature (MAATpeat) during the late Quaternary in southeast Africa, and the lowess smoothed composite MAATpeat is included in this data set