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Water column dissolved methane concentrations during SONNE cruise SO298
No full textThe data set comprises concentrations of dissolved methane (CH4) from seawater samples collected during the RV/Sonne cruise SO-298. The expedition took place between April 14th and June 2nd 2023, and focused on physical and biogeochemical conditions across the equatorial Pacific Ocean as part of the GEOTRACES program. Samples were collected by drawing water from a 10 L Niskin bottle into borosilicate 20 mL vials, which were then sealed with rubber (butyl) stoppers and aluminium caps. Immediately after collection, samples were preserved by adding 100 µL of a saturated mercuric chloride solution. Samples were analyzed by means of a standard headspace method coupled to gas chromatography/flame ionization detection (see e.g. Wilson et al., 2018; https://doi.org/10.5194/bg-15-5891-2018)
Biogeochemical dataset from 6 gravity cores taken as part of the PROSPECTOMICS project
No full textThe cruise no. 248 (GS23) of Research Vessel G.O. Sars took place from June 7th to 18th, 2023, covering a transect from Tromsø to Svalbard. During the expedition, we collected a total of 6 gravity cores from the southern Barents Sea at ca. 300 m water depth from three sampling areas, corresponding either to known thermogenic and biogenic gas anomalies (i.e. site 1, site 2) or to pristine seabed as reference (i.e. site 3). Gravity cores were subsampled on board and further conditioned for downstream analyses, namely: pore water geochemistry (ion chromatography, alkalinity titration and spectrophotometry), dissolved gas concentrations (gas chromatography), total cell counts (fluorescence microscopy). Here, we provide the corresponding results covering pore water geochemistry, dissolved gas concentrations, and total cell counts
FerryBox-integrated membrane-based pCO2, temperature, salinity, oxygen, chlorophyll, turbidity and pH measurements of BU-C-2205 during RV Burchana cruise
No full textThe submitted data were collected with a FerryBox-Device on RV Burchana in the transitional and coastal waters of Lower Saxony, Germany. It contains data for temperature, salinity, pH, chlorophyll, oxygen, turbidity and carbon dioxide partial pressure (pCO2) at a water depth of approximately 1.3 m. Within the Carbostore project, totally 8 measurement campaigns were carried out in the years 2021 to 2023. The data is reprocessed and related to a 60 s period. In order to obtain a complete (but rough) overview of the pCO2 situation in this area, values outside the calibration limits (200-1000 µatm) were retained. Dissolved oxygen measurements were corrected by temperature and salinity. The sensors are regularly calibrated, maintained and replaced if necessary. The files are named according to the project, the year and the month of the campaign
ANT 2007/08: AWI airborne Radio-Echo Sounding data over central Dronning Maund Land and East Antarctica connecting the Vostok, Dome C and Talus Dome ice core sites (DoCo and VISA projects)
No full textThis dataset contains airborne radar data acquired using the AWI EMR system during the Antarctic season of 2007/08. The profiles extend across the Dronning Maud Land and central East Antarctica connecting the EPICA Dome C (EDC), Talos Dome and Vostok ice core sites as well as Dome A. The data are available as netCDF files (including waveforms and metadata), KML files of the profile line locations, and quicklook images of the radargrams
Isotopic composition of the atmospheric water vapor during the austral summer at Concordia Station, Dome C, East Antarctica (December 2023 – February 2024)
No full textThe dataset provides a 2.5-month record (December 6th 2023 – February 14th 2024) of the atmospheric water vapor isotopic composition at Concordia Station (Dome C), East Antarctica (-75.10°N, 123.35°E, 3233 m a.s.l.). The atmospheric water vapor isotopic composition is measured by two different laser spectrometers: a L2130-i analyser, manufactured by PICARRO Inc. (CRDS measurement technique) and a prototype version of the ProCeas H2O analyser, manufactured by AP2E Inc. (OF-CEAS measurement technique). The inlet of the instrumental set-up is sampling the atmosphere from 50 cm above the snow surface. The dataset provides the hourly-averaged calibrated measurements from both laser spectrometers. The datetime column is in UTC (UTC+8 for local datetime). The timestamp represents the start of the hourly-averaged period. The humidity (mixing ratio) data has been calibrated against an independent humidity measurement and is reported in ppmv. The isotope data has been calibrated for the isotope-humidity dependency and against the VSMOW-SLAP scale and is reported in delta-notation (in ‰)
Paleo- and rock magentic data of core PS97/085-3
No full textDuring Expedition PS97 of the Research Vessel POLARSTERN to the Drake Passage in 2016, three sediment cores, PS97/085-3, PS97/084-1, and PS97/079-2 were collected along the Shackleton Fracture Zone. The age model of core PS97/085-3 was constructed using a combination of radiocarbon dating and tie points from paleomagnetic and environmental tuning (refer to https://doi.org/10.1594/PANGAEA.923843). The age models of cores PS97/084-1and PS97/079-2 were determined by tuning their rock magnetic parameters to those of core PS97/085-3. Rock magnetic results indicate that the magnetic minerals in the three sediments cores are dominated by (titano-)magnetite and have well-preserved geomagnetic signals. This dataset includes rock magnetic results of bulk magnetic susceptibility, anhysteretic remanent magnetization (ARM), and saturated Isothermal remanent magnetization (SIRM), and paleomagnetic results of characteristic inclination and declination, natural remanent magnetization (NRM) after alternating field (AF) field of 30 mT (NRM30mT), and relative paleointensity (RPI). RPIs are determined by NRM30mT/SIRM for cores PS97/084-1, and PS97/079-2, and by ln(NRM30mT)/ARM for core PS97/085-3