cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.952687
title: Equatorial Atlantic hydrographic and seawater sensor data collected during RRS James Cook cruise JC094: dive 228

description: This data release includes sensor data collected from Remotely Operated Vehicle (ROV) sensors during a 2013 (October - November) research expedition onboard the RRS James Cook, JC094, in the Equatorial Atlantic Ocean. The JC094 TROPICS cruise was a fieldwork component of a European Research Council funded project, CACH ('Reconstructing abrupt Changes in Chemistry and Circulation of the Equatorial Atlantic Ocean: Implications for global Climate and deep-water Habitats') led by Prof. Laura Robinson from the University of Bristol to study paleoclimate archives in the Atlantic. Seventeen ROV dives were carried out. All data have been binned by time.
DOI: 10.1594/pangaea.952688
title: Equatorial Atlantic hydrographic and seawater sensor data collected during RRS James Cook cruise JC094: dive 229

description: This data release includes sensor data collected from Remotely Operated Vehicle (ROV) sensors during a 2013 (October - November) research expedition onboard the RRS James Cook, JC094, in the Equatorial Atlantic Ocean. The JC094 TROPICS cruise was a fieldwork component of a European Research Council funded project, CACH ('Reconstructing abrupt Changes in Chemistry and Circulation of the Equatorial Atlantic Ocean: Implications for global Climate and deep-water Habitats') led by Prof. Laura Robinson from the University of Bristol to study paleoclimate archives in the Atlantic. Seventeen ROV dives were carried out. All data have been binned by time.
DOI: 10.1594/pangaea.952690
title: Equatorial Atlantic hydrographic and seawater sensor data collected during RRS James Cook cruise JC094: dive 230

description: This data release includes sensor data collected from Remotely Operated Vehicle (ROV) sensors during a 2013 (October - November) research expedition onboard the RRS James Cook, JC094, in the Equatorial Atlantic Ocean. The JC094 TROPICS cruise was a fieldwork component of a European Research Council funded project, CACH ('Reconstructing abrupt Changes in Chemistry and Circulation of the Equatorial Atlantic Ocean: Implications for global Climate and deep-water Habitats') led by Prof. Laura Robinson from the University of Bristol to study paleoclimate archives in the Atlantic. Seventeen ROV dives were carried out. All data have been binned by time.
DOI: 10.1594/pangaea.952711
title: Equatorial Atlantic hydrographic and seawater sensor data collected during RRS James Cook cruise JC094: dive 231

description: This data release includes sensor data collected from Remotely Operated Vehicle (ROV) sensors during a 2013 (October - November) research expedition onboard the RRS James Cook, JC094, in the Equatorial Atlantic Ocean. The JC094 TROPICS cruise was a fieldwork component of a European Research Council funded project, CACH ('Reconstructing abrupt Changes in Chemistry and Circulation of the Equatorial Atlantic Ocean: Implications for global Climate and deep-water Habitats') led by Prof. Laura Robinson from the University of Bristol to study paleoclimate archives in the Atlantic. Seventeen ROV dives were carried out. All data have been binned by time.
DOI: 10.15468/dl.f8cbrp
title: Occurrence Download

description: A dataset containing 13748 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Enicurus leschenaulti"
 ]
}

 The dataset includes 13748 records from 28 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0029810-251025141854904/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.932701
title: Stable oxygen isotopes measured on Planulina ariminensis of sediment core GeoB14885-1
DOI: 10.1594/pangaea.890197
title: Biogeochemical characterization of water masses over oceanic seamounts off two CTD dives measured during MEDWAVES cruise in 2016

description: The main objective of the work conducted by the biogeochemical oceanography team was to determine the biogeochemichal role of the Mediterranean Water, over and around the Formigas, Ormonde and Seco de los Olivos seamounts, as well as the Gazul Mud volcano (ATLAS Task 1.3 and task 3.1, potential contribution also to tasks 2.1 and 2.2).Greater emphasis has been done on fine scale biogeochemical characterization 500 meters above the bottom with emphasis on CO2 variables to determine extant characteristics and any future threats / sensibility for benthic communities (ATLAS Tasks 1.3, 2.4 and 3.1 and potential contribution to task 2.2). The biogeochemical parameters measured have been dissolved oxygen (DO), pH, Total Alkalinity (TA), carbonate ion concentration (CO32-), Dissolved Inorganic Carbon (DIC) and inorganic nutrients (nitrate, nitrite, silicate and phosphate). pH in seawater was measured following the methodology by Clayton & Byrne (1993) using a double-wavelength spectrophotometric procedure (Byrne 1987). It has been reported at 25 °C and on the Total scale (pH25T). Total Alkalinity (TA) was analyzed following a double end point potentiometric technique by Pérez & Fraga (1987) further improved in Pérez et al. (2000). The carbonate ion concentration (CO32-) was determined spectrophotometrically following the recent method first proposed by Patsavas et al. (2015), after the works by Byrne and Yao (2008) and Easley et al. (2013). Dissolved Inorganic Carbon (DIC) samples were analysed using a VINDTA 3D system (www.MARIANDA.com). The fundament is extracting the CO2 from the seawater sample by adding phosphoric acid, followed by coulometric detection (Johnson et al., 1993). Inorganic nutrients were determined using colorimetric methods using a SEAL Analytical QuAAtro analyzer. Nitrate was measured with Cu-Cd reduction Naphthylenediamine photometric method. Nitrite was measured with Naphthylenediamine photometric method. Both methods are from Grasshoff et al (1983). Silicate and phosphate were measured with Molybdenum blue method from Murphy & Riley (1962). Some data have been subjected to quality control based on the WOCE/Go-Ship flags (Flag_O2; Flag_pH25T; Flag_TA; Flag_CO3; Flag_DIC). A Flag=2 means an acceptable data; flag=3 means a questionable data; flag=9 not sample measured. More information about the quality controls in Olsen et al. (2016; doi:10.5194/essd-8-297-2016).
DOI: 10.1594/pangaea.903117
title: Weather station (Meteo Sarti Vantage Pro2) measurements collected at the OBSEA shore station (UPC) during August, 2010
DOI: 10.1594/pangaea.931908
title: Current velocity measurements from upward-looking ADCP at Qikiqtaruk during the Yukon Coast 2018 expedition of the AWI

description: The dataset compiles water current velocities and direction measured by a platform-based upward looking Acoustic Doppler Current Profiler. Data was acquired in August 2018 during the Yukon Coast 2018 expedition to the Herschel Island – Qikiqtaruk coastal observatory, conducted by the Alfred Wegener Institute in Potsdam, Germany. Goal of this project was to find drivers that control nearshore currents and to map their spatio-temporal variation. These currents might play an important role in the transport process of sediments and organic matter in the nearshore zone of the Arctic Ocean. The sediments mainly originate from the rapidly eroding permafrost coasts. The columns of this data file include Date/Time, height above the seafloor of the respective measurement cell (bin), current velocity in east-west direction and current velocity in north-south direction.
description: Data description:Setting: 4 Beam in 20 degree Janus configurationDeployment location: Latitude 69.465833 N / Longitude 139.030555 WDepth: ca. 7 meter - (varying with sea level)Number of cells (bins): 14Bin size: 0.50 meter First bin: 1.60 meter Measurements per hour: 60Pings per Ensemble: 50 Time/Ping: 1.20 sData is given in "oceanographic convention" (i.e. the direction the current is directed to)Pre- and post-processing steps:Step 1 - Calibration of the instrument by following the calibration setup in the software (RD Instrument WinSC)Step 2 – Definition of planned deployment schedule and parameterization of the device (RD Instrument WinSc + RD Instrument PlanADCP)Step 3 - Deployment of the ADCP with a ZODIAC at the study site using a bottom mooring mounted on a stainless steel plateStep 4 - Retrieval of the instrument after 14 daysStep 5 - Download of the collected dataStep 6 - Opening of the data files with RDI VelocityStep 7 – Adjustment of the raw data for the following parameters using RDI Velocity software and the corresponding "Velocity Users Guide":a) Magnetic declination (accessed from https://www.ngdc.noaa.gov/geomag/calculators/magcalc.shtml#declination; Magnetic declination = 20.16 degreeb) Salinity (average value derived from 2 point measurements through the water column with data ~0.3 meter) analysed from water column profiles retrieved with a handheld CastAway CTD; Salinity = 20.45 ppt (parts per thousand)c) Speed of sound velocities were recalculated using temperature, salinity and depthd) Surface boundary: Contaminated upper bins were removed (blank) using the "Range to boundary - Intensity" function of Velocity, to remove measurements that were affected by turbulent air bubbles from wave action.Step 8 - Exporting the processed files to Matlab using the Velocity Export function; Data right after lowering the mooring system and after retrieving was removedStep 9 – Writing of txt-file in Matlab (tab delimiter, ISO 8601 date format, UTF-8, missing or removed data is left empty)
DOI: 10.1594/pangaea.897045
title: Vegetation height derived from Sentinel-1 and Sentinel-2 satellite data (2015-2018) for tundra regions

description: Vegetation height has been derived from Sentinel-1 satellite data acquired in VV mode. Masking based on Sentinel-2 has been applied.Areas with NDVI &lt; 0.4 are excluded for vegetation height retrieval in order to account for effects related to C-band scattering from rough and bare surfaces. Areas with VV &lt; -15.4 dB (and NDVI &gt; 0.4) are flagged as well as indicator for anomalous high values in vegetation related indices with at the same time low vegetation height. The remaining land area is assigned vegetation heights up to 160 cm. All heights &gt; 160 cm are excluded and labelled as a separate class.Covered areas are: Yamal peninsula (Russia), Usa Basin (Russia), Lena Delta (Russia), Kytalyk (Russia), Mackenzie Delta (Canada), Umiuaq (Canada), Barrow (Alaska), Teshekpuk (Alaska), Toolik (Alaska) and Seward peninsula (Alaska).For more Information see the product documentation.
DOI: 10.1594/pangaea.902731
title: CTD (SBE 16 PLUS V2) measurements collected at the OBSEA underwater observatory during February, 2018
DOI: 10.1594/pangaea.934095
title: Agglutinated benthic foraminifera of sediment core DA17-NG-ST7-73G
DOI: 10.1594/pangaea.884596
title: Conservative temperature records and current meter measurements from moored sensors, link to files
DOI: 10.1594/pangaea.958675
title: Plant DNA taxa detected in Lake Savine sediments (North-western Alps) over the last 8000 years

description: This dataset contains plant taxa detected by sedimentary DNA analyses. The dataset is presented in number of DNA sequences by replicate of analyses (12 PCR replicates). It has been generated applying the DNA metabarcoding approach on a 7.75-m long sediment cores retrieved by using an Uwitec piston coring device directly from the ice-covered surface of the lake. The primers used are g (5'-GGGCAATCCTGAGCCAA-3') and h (5'-CCATTGAGTCTCTGCACCTATC-3') (Taberlet, P., et al. Power and limitations of the chloroplast trn L (UAA) intron for plant DNA barcoding. Nucleic acids research, 35(3), e14-e14. (2007)). The sequences were then produced by the Illumina technology (HiSeq instrument). The bioinformatic treatment of the sequences was operated applying the Obitool program (Boyer, F. et al. OBITOOLS:aUNIX-inspired software package for DNAmetabarcoding. Mol. Ecol. Resour. 16, 176–182 (2016)) and following the procedure described in Giguet-Covex et al. New insights on lake sediment DNA from the catchment: importance of taphonomic and analytical issues on the record quality. Scientific Reports. 9, 14676 (2019) (DOI https://doi.org/10.1038/s41598-019-50339-1). Further filtering treatments were then applied, as also described in Giguet-Covex et al. 2019. These second treatments allow the removal of 1) taxa assigned to a reference taxon at &lt;95 % of sequence identity, 2) potential contaminations (based on sampling, extraction and PCR controls, and recognition of exotic taxa) and 3) stochastic detections.
DOI: 10.1594/pangaea.934168
title: Marine electrical resistivity profile 4 - west, Bykovsky Peninsula, Siberia

description: The data was collected with an IRIS Syscal Pro Deep Marine resistivity system that was equipped with a GPS and an echo-sounder to record water depths. The geoelectric cable had an electrode separation of 10 m and the electrodes were arranged in a reciprocal Wenner Schlumberger array. The offset between the first electrode and the boat was approximately 10 m.
description: Distance: Distance of boat position from starting point (m). This is not a cumulative distance.Water_depth: Water depth (m) from echo-sounderP1P2: Apparent resistivity (ohm-m) measured between potential electrodes P1 and P2. The remaining apparent resistivity columns have the same structure.C1: Position (m) of current electrode C1 relative to the boat position. For example, -60 m indicates that C1 is located 60 m behind the boat at the profile start.C2: Position (m) of current electrode C2 relative to the boat position. For example, -70 m indicates that C2 is located 70 m behind the boat at the profile start.P1: Position (m) of potential electrode P1 relative to the boat position. For example, -80 m indicates that P1 is located 80 m behind the boat at the profile start.P2: Position (m) of potential electrode P2 relative to the boat position. For example, -50 m indicates that P2 is located 50 m behind the boat at the profile start.The remaining electrode position columns follow the same structure.Latitude: latitude of boat position measured with GPS (WGS 1984)Longitude: longitude of boat position measured with GPS (WGS 1984)Note: Profile 4 (East) and Profile (West) were originally part of a single profile, but they were chopped into two segments for which the geoelectric cable was straight. Therefore, the initial distance of Profile (West) is listed as 357 m. Since the latter is the distance from the Profile 4 (East) origin point, the latitude and longitude coordinates should be used for more accurate estimates of distances between soundings along Profile 4 (West).
DOI: 10.1594/pangaea.943844
title: In-vitro hydrolysis rates of bio-based plastics under environmentally relevant temperatures

description: Bio-degradation assays were performed for bio-based plastics under environmentally relevant temperature between 5 and 30 °C using pH Stat titration. Suspensions of bio-based microparticles were incubated with different hydrolytic enzymes, a lipase from Candida antarctica, an esterase from Bacillus subtilis and a protease from Bacillus licheniformis. Rates of hydrolysis, as determined by counter-titration with a diluted base (NaOH), was recorded for two hours. The thermal profiles of plastic hydrolysis by all three enzymes were investigated. All measurements were conducted under controlled laboratory conditions.
description: The columns headings are abbreviated and mean the following. Min: Duration of the titration in minutes; ml: Volume of added NaOH. Unless otherwise specified, c = 10 mM; pH: pH value of the suspension, set to 8.2; °C: Temperature of the suspension.
DOI: 10.1594/pangaea.911273
title: Transcriptomic and histological analysis (Light and Transmission Electron Microscopy) on five Geodia species to identify their reproductive status and the gene expression during gametogenesis

description: The collected samples of Geodia species were used to identify if they were reproductive and understand which genes are expressed during gametogenesis. Specifically, specimens fixed in glutaraldehyde solution, were processed for histological analysis to observe gametes in the sponge tissue. Once, we identified male, female (while in gametogenesis) and non-reproductive specimens, we used the RNAlater fixed samples to extract RNA from those specimens. Then, we prepared cDNA libraries, sequenced them with illumina nextseq and we did differential gene expression analysis in order to compare the expressed genes in male vs female specimens and vs non-reproductive specimens. The goal was to understand the molecular machinery of gametogenesis in sponges from an evolutionary point of view.
DOI: 10.1594/pangaea.942236
title: Radiocarbon age measurements on foraminifera from sediment core OR1-1218-C2-BC, large volume bulk
DOI: 10.1594/pangaea.956663
title: Local snow dunes / sastrugi heights across the plateau of Dronning Maud Land, East Antarctica

description: Local snow surface heights were sampled in December 2018 across a traverse of ~ 100 km near Kohnen Station. They were used to quantify surface roughness and its relation to stratigraphic noise in isotope records from firn cores. At six different locations (D2, C4, C5, D7, D24, D38) snow heights were measured along the positioning of the firn cores (along 60 m), with a 1-2 m horizontal resolution and an accuracy of ∓ 1 cm using a Geodät levelling device. The measurements were done perpendicularly to the overall large scale wind direction.
DOI: 10.1594/pangaea.902664
title: CTD (SBE 37 SMP) measurements collected at the OBSEA underwater observatory during January, 2016
DOI: 10.1594/pangaea.902654
title: CTD (SBE 16 PLUS V2) measurements collected at the OBSEA underwater observatory during November, 2015
DOI: 10.1594/pangaea.908935
title: Devologic lander ADCP data at Goldeneye (North Sea) deployed during cruise POSEIDON POS518 and recovered during JAMES COOK cruise JC180

description: ADCP data for a long-term lander deployment.
DOI: 10.1594/pangaea.917599
title: Metadata and NCBI-Accession numbers of Vazella pourtalesii metagenomes from the Scotian Shelf (Canada) in summer 2017

description: Until now few studies have explored the microbiomes of glass sponges (Hexactinellida). Vazella pourtalesii forms globally unique, monospecific sponge grounds under low-oxygen conditions on the Scotian Shelf. Using metagenomic binning we performed detailed analyses of the metabolic functional capacities of four V. pourtalesii-associated microbial taxa (SAR324, Patescibacteria, Nanoarchaeota, and Crenarchaeota).
DOI: 10.1594/pangaea.984651
title: Coloured dissolved organic matter absorption of unfiltered samples from sea ice cores from the coastal zone of the southern Canadian Beaufort Sea, near Herschel Island - Qikiqtaruk

description: For DOC and CDOM absorption, samples were filtered through a 0.7 μm glass fibre filter (Whatman GF/F syringe filter) which had been rinsed with 20 mL sample water. DOC samples were collected in 20 ml glass vials with septum lid, acifdified with HCl to pH &lt; 2 and stored at 4°C until analysis. DOC was measured with a Shimadzu TOC-V analyzer. CDOM samples were collected in 100 mL amber glass bottles that were stored in the dark at 4°C until analysis. aCDOM was measured at the German Research Center for Geosciences (GFZ), Potsdam, Germany using a double beam LAMBDA 950 UV/Vis (PerkinElmer) spectrophotometer. The absorbance (A) was measured between 200 and 800 nm in 1 nm steps using a 5 cm cuvette. Absorption (a) was calculated from the resulting absorbance measurements via aCDOM(λ) = 2.303 * A(λ) / l, where l is the path length (length of cuvette in meter). Every 5 to 10 samples, the reference sample (Milli-Q water) was exchanged and a blank was measured to avoid instrument drift. Spectral slopes (S275-295, S350-400) as well as the Slope Ratio (SR = S275-295/S350-400) were derived using the linear regression slope of the log-transformed (natural logarithm) absorption spectra (Helms et al. (2008). Specific UV absorbance (SUVA) is defined as the UV absorbance of a water sample at a given wavelength normalized for dissolved organic carbon (DOC) concentration. SUVA254 is defined as the UV absorption at 254 nm divided by the DOC concentration measured in mg L-1 (Weishaar et al., 2003). Spectral slope, Slope Ratio and SUVA were only calculated for data from filtered samples as these parameters purely depend on dissolved matter properties. CDOM absorption spectra from unfiltered aliquots of the same sample might still be of interest as they provide insight into bulk optical properties, which are crucial for total absorption budgets and remote sensing algorithms that do not distinguish dissolved vs particulate absorption.
DOI: 10.1594/pangaea.984652
title: Coloured dissolved organic matter absorption of filtered samples from sea ice cores from the coastal zone of the southern Canadian Beaufort Sea, near Herschel Island - Qikiqtaruk

description: For DOC and CDOM absorption, samples were filtered through a 0.7 μm glass fibre filter (Whatman GF/F syringe filter) which had been rinsed with 20 mL sample water. DOC samples were collected in 20 ml glass vials with septum lid, acifdified with HCl to pH &lt; 2 and stored at 4°C until analysis. DOC was measured with a Shimadzu TOC-V analyzer. CDOM samples were collected in 100 mL amber glass bottles that were stored in the dark at 4°C until analysis. aCDOM was measured at the German Research Center for Geosciences (GFZ), Potsdam, Germany using a double beam LAMBDA 950 UV/Vis (PerkinElmer) spectrophotometer. The absorbance (A) was measured between 200 and 800 nm in 1 nm steps using a 5 cm cuvette. Absorption (a) was calculated from the resulting absorbance measurements via aCDOM(λ) = 2.303 * A(λ) / l, where l is the path length (length of cuvette in meter). Every 5 to 10 samples, the reference sample (Milli-Q water) was exchanged and a blank was measured to avoid instrument drift. Spectral slopes (S275-295, S350-400) as well as the Slope Ratio (SR = S275-295/S350-400) were derived using the linear regression slope of the log-transformed (natural logarithm) absorption spectra (Helms et al. (2008). Specific UV absorbance (SUVA) is defined as the UV absorbance of a water sample at a given wavelength normalized for dissolved organic carbon (DOC) concentration. SUVA254 is defined as the UV absorption at 254 nm divided by the DOC concentration measured in mg L-1 (Weishaar et al., 2003). Spectral slope, Slope Ratio and SUVA were only calculated for data from filtered samples as these parameters purely depend on dissolved matter properties. CDOM absorption spectra from unfiltered aliquots of the same sample might still be of interest as they provide insight into bulk optical properties, which are crucial for total absorption budgets and remote sensing algorithms that do not distinguish dissolved vs particulate absorption.
DOI: 10.1594/pangaea.984650
title: Dissolved organic carbon, salinity, electrical conductivity, suspended particulate matter, and isotopic composition of sea ice cores sampled in the coastal zone of the southern Canadian Beaufort Sea, near Herschel Island - Qikiqtaruk

description: Isotope analyses at AWI Potsdam were performed using DELTA-S Finnigan MAT mass spectrometers (USA) employing the equilibration method, described in Meyer et al. (2000). The isotope ratios are reported in per mil (‰) relative to the Vienna Standard Mean Ocean Water (VSMOW) as the international reference standard. In addition to the δ¹⁸O and δD values, the second-order parameter deuterium excess (d) was calculated according to the equation (after Dansgaard, 1964): d = δD − 8 × δ¹⁸O