Publishing Network for Geoscientific and Environmental Data
Not a member yet
441201 research outputs found
Sort by
Danish Meteorological Institute Qaanaaq Winter Observatory, Automatic Weather Station measuring temperatures, radiation, and winds (2015-2023)
No full textThe Danish Meteorological Institute (DMI) Qaanaaq Winter Observatory (QWO) data set consists of Automatic Weather Station (AWS) measurements from stations located on sea ice off shore at Qaanaaq in Nortwestern Greenland. The data consists of 10 years of winter observations from 3 different AWS'. The stations have measured surface temperature, air temperature, longwave radiation, shortwave radiation, wind speed, relative humidity, and snow depth from sea ice. The data is a fiducial reference measurements dataset and is part of the ArcticPASSION programme. The station ID in the filename (DMI-QWO1, DMI-QWO2, DMI-QWO3) corresponds to the station/datalogger used for observations in that file. DMI-QWO1 is a CR1000, DMI-QWO2 a CR1000x, and DMI-QWO3 is a mini CR1000x mainly measuring a few temperatures. All these instruments are Campbell Scientific products
Major element analysis (Zr/Al) for the Marine Isotope Stage (MIS) 19 to MIS 28 interval of IODP Site 339-U1387, Gulf of Cadiz
No full textAir- and soil temperature data from PhytOakmeter plot FBOL_14 (Toulenne, France) from 2018
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
Benthic foraminiferal trace element ratios at IODP Site 383-U1540 during Marine Isotope Stage 11
No full textThis dataset presents benthic foraminiferal trace element ratios (i.e., B/Ca, U/Ca, Mn/Ca, U/Mn, Al/Ca, Fe/Ca) measured on the epibenthic foraminifera Cibicides kullenbergi at sediments from International Ocean Discovery Program Site 383-U1540 (55° 8.47ʹ S, 114° 50.52ʹ W, 3580 m) during Marine Isotope Stage 11. The samples were reductively cleaned and to determine the uncertainty of the analyses, two full replicates were analyzed. For all except one sample the C. kullenbergi Al/Ca ratios were below the limit of detection (LOD), at 0.5 µmol/mol. The element ratios were measured at the Institute of Geosciences at Kiel University (Kiel, Germany) using an Agilent 7900 inductively coupled plasma-mass spectrometer (ICP-MS). The degree of carbonate ion saturation (Δ[CO₃²⁻]) in bottom waters was calculated using the calibration of Yu and Elderfield (2007, doi:10.1016/j.epsl.2007.03.025)
Methane and Dimethylsulfoniopropionate (DMSP) concentration in the South China Sea
No full textThe South China Sea (SCS) frequently encounters mesoscale eddies due to the influence of the Kuroshio intrusion and monsoonal patterns. However, the impact of these eddies on methane (CH⁴) biogeochemical cycling in the SCS remains poorly understood. Dissolved methane and dimethylsulfoniopropionate (DMSP) samples were collected from the eddy pair (cyclonic-anticyclonic eddy pair) at stations ME1−ME7, located near the western side of Hainan Island, on September 27, 2020. Additionally, methane concentration and oxidation rates were assessed within anticyclonic eddy stations between September 13 and 23, 2022. The distribution of SLA were obtained from the Copernicus Marine Environment Monitoring Service at 0.25° resolution. Seawater samples collected by 12 L Niskin bottles equipped with SBE 911 plus a conductivity-temperature-depth (CTD) probe. The CH⁴ sample was collected in 120 ml brown bottles and then 50 μl saturated HgCl₂ was added to inhibit biological activity. Samples were sealed with aluminum caps containing Teflon septa and temporarily stored in the dark at 4°C. Dissolved methane was measured using a cryogenic purge-and-trap setup connected to an gas chromatograph (GC-8890, Agilent, USA) with a flame ionization detector (FID) according to the detailed methods given in (Zhang et al. (2004, doi:10.1029/2004JC002268). For total dimethylsulfoniopropionate (DMSPt), 5 ml seawater were preserved with the addition of 5 μl of 50% sulfuric acid to oxidize dimethylsulfide (DMS) into nonvolatile compounds and inhibit biological activity. Seawater samples intended for dissolved DMSP (DMSPd) determination were pre-filtered by gravity using a 0.45 μm filter. Particulate DMSP (DMSPp) was derived by subtracting DMSPd from DMSPt. All DMSP samples were stored in darkness at 4℃ until analysis. Briefly, a 2 ml sample was mixed with 200 μl of 10 mol/potassium hydroxide (KOH) and incubated at room temperature for 6 h to ensure complete conversion of DMSP into DMS. Seawater DMS samples were analyzed immediately after collection using a modified purge-and-trap method on a gas chromatograph (GC-2014, Shimadzu, Japan) equipped with a flame photometric detector (FPD) (Yang et al., 2012, doi:10.1016/j.marchem.2012.05.003)
Elemental analysis of sediment core from Lake Prata (São Miguel, Azores, Portugal)
No full textThe location of the Azores Archipelago makes this group of islands an excellent setting for investigating past long-term temperature and precipitation changes in the central North Atlantic region. Lake Prata (37º48'23''N, 25°44'12''W; 520 m a.s.l.) is found on the island of São Miguel, more precisely in the western sector of the Picos fissure system, 5 km SE of the Sete Cidades caldera, and it fills the crater of a scoria cone older than 5000 years. The lake is currently a Sphagnum/Eleocaris-dominated peatland. In January 2021, a 4.5-m long core was collected from Lake Prata using a Russian corer with a 50 cm long and 7 cm diameter sampler. The core was packed in PVC trays and covered in plastic film before being transported to the CIBIO's paleolimnology laboratory (University of Azores). The core was dated using ¹⁴C and produced a multi-proxy dataset of geochemical and biological analyses that we used to uncover paleoenvironmental changes on Lake Prata in the last ca. 1200 years
