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Size-fractionated particulate total mercury and monomethylmercury concentrations in the Southern Ocean during the PS133/1 expedition (22 October – 9 November 2022)
No full textConcentrations of particulate total mercury (Hg) and monomethylmercury (MMHg) were determined in size-fractionated suspended particles collected in the Southern Ocean between 22 October and 9 November 2022 during the PS133/1 expedition. Particles were collected using battery-powered in situ large-volume pumps (McLane Research Laboratories, Inc. and Challenger Oceanic's Stand-Alone Pumping System, SAPS) equipped with 142 mm diameter filter holders (MULVFS style; Bishop et al., 2012). Pumps were deployed at depths ranging from 25 to 350 m. Each filter holder contained two filters for size fractionation: a 51 μm Sefar Petex screen (SEFAR GmbH)—acid-leached prior to the cruise—mounted above a pre-combusted QMA filter (nominal pore size ~2.2 μm), separating particle size classes of 2.2–51 μm and >51 μm. Particulate total mercury was quantified by thermal decomposition, amalgamation, and atomic absorption spectrophotometry (TDA–AAS) using a DMA-EVO Direct Mercury Analyzer (Milestone). MMHg concentrations were determined by gas chromatography–cold vapor atomic fluorescence spectrometry (GC–CVAFS) using a Brooks Rand methylmercury analysis system following acid digestion. Data are reported both as mass-specific concentrations (ng g⁻¹ of suspended particulate matter) and as volume-normalized concentrations (pmol L⁻¹), corrected for the volume of water filtered
Air- and soil temperature data from PhytOakmeter plot FBOL_14 (Toulenne, France) from 2022
No full textSoil temperature at 15cm depth and air temperature at 60cm height were collected using HOBO Pro V2 loggers, model U23-004. Three loggers were used. After data visualization, unrealistic values were removed manually for each logger and mean temperature values were calculated at 30-minute intervals
Air- and soil temperature data from PhytOakmeter plot FBOL_14 (Toulenne, France) from 2023
No full textSoil temperature at 15cm depth and air temperature at 60cm height were collected using HOBO Pro V2 loggers, model U23-004. Three loggers were used. After data visualization, unrealistic values were removed manually for each logger and mean temperature values were calculated at 30-minute intervals
Chironomidae-inferred late Holocene water level reconstruction from the alas lake (AL1 profile) in the Yana-Indigirka Lowland, NE Yakutia
No full textThis data set presents the reconstructed water level for AL1 sediment core based on subfossil Chironomidae data. The core was collected in July 2019 from from the lower alas level, approximately 1.5 km north of the Berelekh River (70.84057° N, 147.48369° E). It was taken from the active layer as a monolith using a Russian auger and was subsequently cut into 1-cm slices in the laboratory of the Chokurdakh Scientific Tundra Station. Water depth was reconstructed using the East-Siberian chironomid-based inference model (WA-PLS, 1 component; r2 boot = 0.62; RMSEP = 0.35) based on a modern calibration dataset of 150 lakes from Yakutia (Nazarova et al., 2011). To determine whether the modern calibration model had adequate analogues for the fossil assemblages, the modern analogue technique (MAT) was performed using C2 version 1.7.7 (Juggins, 2007) on percentage, square-root-transformed data. The distance between each fossil sample and its most similar modern assemblage was compared, and the 5th percentile of all squared-chord distances of the modern data was used to define the cut-off for a good analogue (Plikk et al., 2019)
Neodymium isotope of fossil fish teeth from ODP Site 181-1123
No full textThe table presents the 143Nd/144Nd ratios measured from fossil fish teeth at ODP Sites 181-1123, 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
Neodymium isotope of fossil fish teeth from ODP Site 198-1208
No full textThe table presents the 143Nd/144Nd ratios measured from fossil fish teeth at ODP Site 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
Master track of Eugen Seibold cruise ES23C05, Panama City - Panama City, 2023-03-15 - 2023-03-15
No full textThis dataset contains the validated master track of the S/Y Eugen Seibold during expedition ES23C05, with a time resolution of about 10 seconds. This master track can be used as reference for further expedition data. For creating the master track, the 1-second resolution raw data acquired by the GPS position sensor on board S/Y Eugen Seibold were processed, averaging latitude and longitude within equidistant 10-second intervals. Quality control was performed visually and by checking the maximum speed calculated between neighbouring positions. In case of unrealistically high speeds, data points have been removed
CIM-ECIMAT ocean meteorological station time-series 2019-2024 - physical oceanography data
No full textWe present a five-year dataset (2019-2024) collected at the CIM-ECIMAT automatic station at the University of Vigo. The data includes a time series of seawater temperature, conductivity, and dissolved oxygen. The sampling interval was ten minutes. This dataset continues the series published in https://doi.org/10.1594/PANGAEA.91603
