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CT raw data (DICOM format) of coral mound core GeoB16318-1 from the Campeche coral mound province, Maria S. Merian cruise MSM20-4
No full textWhole rounds of the gravity core GeoB16318-1 from a cold-water coral mound in the Campeche coral mound province, Gulf of Mexico, were scanned using a Toshiba Aquilion 64™ computer tomograph (CT) at the hospital Klinikum Bremen-Mitte, Germany, with an X-ray source voltage of 120 kV and a current of 600 mA. The CT image stacks have a resolution of 0.35 mm in the x and y directions and 0.5 mm resolution in the z direction (0.3 mm reconstruction interval). Images were reconstructed using Toshiba's patented helical cone beam reconstruction technique (TCOT)
LA-ICP-MS data (Mg/Ca, Sr/Ca and Mn/Ca) of foraminifera from controlled growth experiments
No full textLA-ICP-MS data from three different experiments including five foraminiferal species: Ammonia confertitesta (Bourgenuf, France), Bulimina marginata, Cassidulina laevigata (Gullmard Fjord, Sweden), Amphistegina lessonii and Operculina ammonoides (Eilat, Israel). Foraminifera were cultured at different oxygen concentrations (30% and 100% oxygen saturation). Element to calcium ratio (E/Ca) and partition coefficients (D) of Mg, Mn and Sr are noted for individual laser ablation measurements per specimen
Shipboard ADCP current measurements (38 kHz) during RV METEOR cruise M204
No full textCurrent velocities of the upper water column along the cruise track of R/V Meteor cruise M204 were collected by a vessel-mounted 38 kHz RDI Ocean Surveyor ADCP. The ADCP transducer was located at 5.0 m below the water line. The instrument was operated in narrowband mode (WM10) with a bin size of 16.00 m, a blanking distance of 8.00 m, and a total of 80 bins, covering the depth range between 29.0 m and 1293.0 m. Attitude data from the ship's motion reference unit were used by the data acquisition software VmDAS internally to convert ADCP beam velocities to geographic coordinates. The Python toolbox OSADCP (version 1.0.0) was used for data post-processing. Single-ping data were screened for bottom signals and, where appropriate, a bottom mask was manually processed. Acoustic Interferences were identified based on outliers in the ADCP echo intensity data. Echo intensity data were cleaned accordingly and affected velocity cells were flagged to be removed prior ensemble-averaging. The ship's velocity was calculated from position fixes obtained by the Global Navigation Satellite System (GNSS), taking into account lever arms of ADCP transducer and GNSS antenna. Accuracy of the derived water velocities mainly depends on the quality of the position fixes and the ship's heading data. Further errors stem from a misalignment of the transducer with the ship's centerline. Data processing included water track calibration of the misalignment angle (0.1026° +/- 0.5853°) and scale factor (1.0014 +/- 0.0111) of the measured velocities. The velocity data were averaged in time using an average interval of 60 s. Depth cells with ensemble-averaged percent-good values below 25% are marked as 'bad data'
Hyperspectral camera raw data (SPECIM_IQ_01) of the Antarctic sea ice cover during the PS140 EASIS cruise in 2024
No full textThe data consists of 2D hyperspectral images 512x512 pixels in 204 bands in the wavengths range between 400 - 900nm with 2.5 nm step, obtained with the SPECIM IQ hyperspectral camera. The observed surfaces comprise open water, snow covered ice floes, flooded sea ice, overturned ice floes with visible algae layers, under variable illumination conditions. The data are raw data in the original SPECIM IQ format. Within the field of view of each scene, there is a white reference plate, which can be used for image calibration to obtain the hemispheric-directional surface reflectances. Out-of-focus white reference still can be used for calibration as the spectral properties are not affected. Each data record is a folder (compressed as one file) readable by the Specim IQ software, which is downloadable free of charge from the manufacturer (Specim) after registration.
This dataset is an experimental setup to explore the use of spatially resolved hyperspectral imaging of Antarctic sea ice obtained from onboard the research vessel
Multibeam bathymetry processed data (Atlas Hydrosweep DS 2 echo sounder entire dataset) of RV POLARSTERN during cruise ARK-XVII/1 (PS59), Fram Strait, Arctic Ocean
No full textMultibeam data were collected during RV Polarstern cruise ARK-XVII/1 (2001-06-19 to 2001-07-29). Multibeam sonar system was Atlas Hydrographic Hydrosweep DS 2 multibeam echo sounder. Data are processed with Caris HIPS, including sound velocity correction by cross fan calibration, tidal correction with TPXO9_atlas_v5 (https://www.tpxo.net), and manual cleaning. The soundings are combined in daily files, the format is XYZ ASCII ( ). Additional grids have been computed with depth dependent cell size to visualize the data. These grids are not meant for scientific analysis or navigation, but for overview purposes only
Forest inventory and tree genetic sampling across 75 sites in Northwestern Canada in summer 2022 (CA-Land_2022_NWCanada)
No full textDuring the CA-Land_2022_NWCanada field campaign in July and August 2022, a comprehensive forest inventory was conducted across 32 full inventory plots and 43 additional short stops for genetic sampling in Northwest Territories, Yukon, and British Columbia, Canada. The study area, located within the boreal forest biome and partially underlain by permafrost soils, was surveyed by scientists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), and the University of Potsdam, Germany. The primary objectives were to document tree and forest characteristics to support research on treeline migration, stand infilling, natural disturbances, and succession processes, as well as to initialize and validate a forest model. Approximately 900 trees were inventoried within circular plots of 15 m radius, covering different vegetation types. Detailed measurements were recorded for around 10 individuals per tree species and 3 per shrub species. Tree parameters included species, position, height, crown base, diameter at base (DBS), diameter at breast height (DBH), minimum and maximum crown diameter (DC min, DC max), and the presence of green cones. For shrubs, species, position, height, and minimum and maximum diameters were documented. Additionally, genetic samples from 835 trees and shrubs were collected in the form of needles, leaves, or cambium tissue, dried on silica gel, and stored at 4°C for future analysis. This dataset provides a valuable resource for studying boreal forest dynamics in the context of environmental change
ARK 1999 : AWI airborne Radio-Echo Sounding Data over Northeast Greenland between North GRIP, GRIP, and GISP2 ice core sites (NOGRAM project)
No full textThis dataset contains airborne radar data acquired using the AWI EMR system (Nixdorf et al., 1999) during the Arctic season of 1999. The profiles extend across the Northeast Greenland Ice Sheet betweenNorth GRIP, GRIP, and GISP2 ice core sites. The data are available as netCDF files (including waveforms and metadata), KML files of the profile line locations, and quicklook images of the radargrams
Master track of HEINCKE cruise HE657 in 1 sec resolution (zipped, 12 MB)
No full textRaw data acquired by position sensors on board RV Heincke during expedition HE657 were processed to receive a validated master track which can be used as reference of further expedition data. During HE657 the inertial navigation system IXSEA PHINS III and the GPS receivers Trimble Marine SPS461 and SAAB R5 SUPREME NAV were used as navigation sensors. Data were downloaded from DAVIS SHIP data base (https://dship.awi.de) with a resolution of 1 sec. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track
10Be and 9Be concentrations in Black Sea sediment core M72/5-22GC-8 covering Termination 2 (133.5 - 127.8 ka BP)
No full text10Be and 9Be records spanning Termination 2 (133.5 – 127.8 ka BP) were obtained from freeze-dried and homogenized samples of Black Sea sediment core M72/5-22GC-8 at 0.5 cm resolution. 10Be concentrations were measured using a MILEA accelerator mass spectrometry (AMS) system in 2021. 9Be concentrations analyzed using inductively coupled plasma mass spectrometry (ICP-MS, iCAP Q, Thermo Fisher Scientific) in 2021. Sediment core M72/5-22GC-8 was recovered from the south-eastern Black Sea (Archangelsky Ridge, 42°13.5'N, 36°29.6'E, 847 m bsl.) using a gravity corer during RV Meteor cruise M72/5 in 2007. Primary objective of the measurements was to establish time-series of 10Be and 9Be variability at multi-decadal resolution
Cenozoic assemblage coccolith size (90th percentile of the Feret's diameter) from the Atlantic Ocean
No full textThis dataset includes the 90th percentile of the size of coccoliths in the assemblage (Feret's diameter; μm) for the Atlantic Ocean Sites DSDP 80-548 and ODP 154-925 and 154-929, spanning the Cenozoic (~0 to 66 Ma). Coccolith size data were acquired from images taken using an ImageStream X MkII flow cytometer with a light polarising filter and include circular-to-oval shaped coccoliths and star-shaped coccoliths. This dataset can be used to investigate how coccolith size of the aforementioned types changes through the Cenozoic