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67 results for “ice core”
Linked collectors and determiners for: (Appendix 9) Stable oxygen isotope record of Globigerina bulloides, and abundances of Neogloboquadrina pachyderma and ice-rafted debris in sediment core MD99-2331.
Natural history specimen data linked to collectors and determiners held within, "(Appendix 9) Stable oxygen isotope record of Globigerina bulloides, and abundances of Neogloboquadrina pachyderma and ice-rafted debris in sediment core MD99-2331". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/7c8fa7a0-f762-11e1-a439-00145eb45e9a">https://bionomia.net/dataset/7c8fa7a0-f762-11e1-a439-00145eb45e9a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/7c8fa7a0-f762-11e1-a439-00145eb45e9a">https://gbif.org/dataset/7c8fa7a0-f762-11e1-a439-00145eb45e9a</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: (Appendix 8) Stable oxygen isotope record of Globigerina bulloides, and abundances of Neogloboquadrina pachyderma and ice-rafted debris in sediment core MD99-2339.
Natural history specimen data linked to collectors and determiners held within, "(Appendix 8) Stable oxygen isotope record of Globigerina bulloides, and abundances of Neogloboquadrina pachyderma and ice-rafted debris in sediment core MD99-2339". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/7c8bc98c-f762-11e1-a439-00145eb45e9a">https://bionomia.net/dataset/7c8bc98c-f762-11e1-a439-00145eb45e9a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/7c8bc98c-f762-11e1-a439-00145eb45e9a">https://gbif.org/dataset/7c8bc98c-f762-11e1-a439-00145eb45e9a</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: (Appendix 5) Stable oxygen isotope record of Globigerina bulloides, and abundances of Neogloboquadrina pachyderma and ice-rafted debris in sediment core MD95-2039.
Natural history specimen data linked to collectors and determiners held within, "(Appendix 5) Stable oxygen isotope record of Globigerina bulloides, and abundances of Neogloboquadrina pachyderma and ice-rafted debris in sediment core MD95-2039". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/7c82cc38-f762-11e1-a439-00145eb45e9a">https://bionomia.net/dataset/7c82cc38-f762-11e1-a439-00145eb45e9a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/7c82cc38-f762-11e1-a439-00145eb45e9a">https://gbif.org/dataset/7c82cc38-f762-11e1-a439-00145eb45e9a</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: (Appendix 4) Stable oxygen isotope record of Globigerina bulloides and abundances of Neogloboquadrina pachyderma and ice-rafted debris in sediment core MD95-2040.
Natural history specimen data linked to collectors and determiners held within, "(Appendix 4) Stable oxygen isotope record of Globigerina bulloides and abundances of Neogloboquadrina pachyderma and ice-rafted debris in sediment core MD95-2040". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/7c7f09f4-f762-11e1-a439-00145eb45e9a">https://bionomia.net/dataset/7c7f09f4-f762-11e1-a439-00145eb45e9a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/7c7f09f4-f762-11e1-a439-00145eb45e9a">https://gbif.org/dataset/7c7f09f4-f762-11e1-a439-00145eb45e9a</a>. Formatted as a Frictionless Data package.
Data set for anthropogenic contaminants in ice cores (Dome C - Antarctica)
<p>The produced dataset (in <em>MS Excel</em> format) contains depth profile concentrations of a 16.5 m deep shallow core (covering approx. 200 years before present) drilled at the plateau site of Dome C, East Antarctica (75°06' South Latitude, 123°21' East Longitude), during the 23<sup>rd</sup> Italian Antarctic Expedition.</p> <p>The concentrations of the Polycyclic Aromatic Hydrocarbon (<em>PAH</em>) Benzo[k]fluoranthene (<em>BKF</em>) and of Organochlorinated Pesticides (<em>OCP</em>) expressed as three single compounds (<em>PeCB</em>, <em>ALD</em> and <em>44D</em>) and total (<em>Σ<sub>51</sub> Pesticides</em>) are given in ng L<sup>-1</sup>.</p> <p>The ice core covers a time interval, which includes periods before and after the introduction of these Persistent Organic Pollutants (<em>POPs</em>) in commercial mixtures, as well as periods before the construction of research station facilities. However, in the top samples of the ice core, detected concentrations of analytes are ascribable to industrial anthropogenic activities.</p>
Ground-penetrating radar and shallow firn cores from Devon Ice Cap, Canadian Arctic
<p>GPR data and firn cores were collected over Devon Ice Cap, Canadian Arctic in May 2015.</p> <p>-----------------------------------------------------------------</p> <p><strong>Firn cores</strong></p> <p>Six ~11 m long firn cores were drilled using a Kovacs drill (9 cm diameter) along the GPR profiles. Pictures were taken of the firn cores, which were subsequently used to log the firn facies. From each core, three sections at different depths that did not include ice layers were weighted with a digital scale and used to calculate the firn density. At each firn core location, the snow depth was recorded, as well as at an additional location where a snow pit was dug (SPB1).</p> <p><em>DIC_firn_cores_2015_density.xlsx</em>: Firn core density measurements. Three measurements were taken from each core, using ice-free sections. </p> <p><em>DIC_firn_cores_2015_stratigraphy.xlsx</em>: Firn stratigraphy for each core location, derived from the firn core pictures. F stands for firn, I for ice layer, and P for percolation pipe/feature (ice in the firn core that does not present as an ice layer throughout the core diameter).</p> <p><em>DIC_snowdepth_2015.xlsx</em>: Snow depth measurements at each core location.</p> <p><em>Firn_core_pictures.zip</em>: Pictures of the firn cores taken with infrared and visible light cameras.</p> <p>-----------------------------------------------------------------</p> <p><strong>GPR data</strong></p> <p>GPR data were collected with a PulseEKKO Noggin radar (Sensors & Software Inc.) with 500 MHz center frequency antennae (i.e., 0.6 m wavelength). The antennae were mounted on a plastic sled towed by snowmobile, generating a data set sampled every ~0.4 m along track. Positioning was obtained with a Leica Geosystems GPS system providing a 25 cm RMS accuracy.</p> <p>Processing of the GPR data was performed in Matlab and included dewow filtering, time-zero shift, background removal, Butterworth band-pass filtering and the application of a gain function.</p> <p><em>PulseEkko_RawData</em>: Folder containing the raw PulseEKKO GPR and GPS files.</p> <p><em>PulseEkko_ProcessedData</em>: Contains the processed GPR data as .mat files. Description of the data files can be found in <em>ProcessedData_readme.txt</em>.</p> <p> </p>
200-years ice core bromine reconstruction at Dome C (Antarctica): observational and modelling results
<p>Bromine enrichment (Br<sub>enr</sub>) has been proposed as an ice core proxy for past sea-ice reconstruction. Understanding the processes that influence bromine preservation in the ice is crucial to achieve a reliable interpretation of ice core signals and to potentially relate them to past sea ice variability. Here, we present a 210 years bromine record that sheds light on the main processes controlling bromine preservation in the snow and ice at Dome C, East Antarctic plateau. Using observations alongside a modelling approach, we demonstrate that the bromine signal is preserved at Dome C and it is not affected by the strong variations in ultraviolet radiation reaching the Antarctic plateau due to the stratospheric ozone hole. Based on this, we investigate whether the Dome C Br<sub>enr</sub> record can be used as an effective tracer of past Antarctic sea ice. Due to the limited time window covered by satellite measurements and the low sea-ice variability observed during the last 30 years in East Antarctica, we cannot fully validate Br<sub>enr </sub>as an effective proxy for past sea-ice reconstructions at Dome C.</p> <p>In this database, annual averaged data for Br, Na and Br<sub>enr</sub> for the shallow ice core are provided.</p> <p> </p>
Audio signals of ice core bursting bubbles from the Dye-3 ice core
<p>Continuous measurements of the sound signal of bursting bubbles in a continuous flow analysis system. The ice samples measured are from Dye-3, Greenland and the measurements are taken using two AKG C451 condenser microphones connected to a Steinberg URC 816 preamplifier.</p>
Dataset - "Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica"
<p>We provide in this dataset the isotopic and ionic records from a 120 m-long ice core drilled at the summit of Derwael ice rise (70°14'44.88'' S, 26°20'5.64'' E) situated in coastal Dronning Maud Land, East Antarctica. Ions concentrations (Na<sup>+</sup>, MSA, Cl<sup>-</sup>, SO<sub>4</sub><sup>2-</sup> and NO<sub>3</sub><sup>-</sup>) and water stable isotopes (δ<sup>18</sup>O, δD and d-excess) are presented for the top 103 meters (corresponding to 1815 and the Tambora eruption) with a continuous record for the water stable isotopes and discontinuous sections for ions concentrations. A complementary database “Annual layer thicknesses and age-depth (oldest estimate) of Derwael Ice Rise (IC12), Dronning Maud Land, East Antarctica” with age model and annual layer thickness is available at https://doi.org/10.1594/PANGAEA.857574 and the companion paper is Philippe et al., 2016 (“Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica”, https://doi.org/10.5194/tc-10-2501-2016).</p>
Physico-chemical properties of the top 120 m of two ice cores in Dronning Maud Land (East Antarctica)
<p>We provide in this dataset the complete records from the top 120 m of two ice cores drilled on two adjacent ice rises (Hammarryggen and Lokeryggen, ~100 km apart) located in coastal Dronning Maud Land, Antarctica. Density, water stable isotopes (δ<sup>18</sup>O, δD and d-excess), ions concentrations (Na<sup>+</sup>, K<sup>+</sup>, Mg<sup>+</sup>, Ca<sup>+</sup>, MSA, Cl<sup>-</sup>, SO<sub>4</sub><sup>2-</sup> and NO<sub>3</sub><sup>-</sup>), and continuous electrical conductivity measurement (ECM) records, as well as age models and resulting surface mass balance (SMB) are presented here. These ice cores are dated back to the end of the eighteenth century (CE 1793 ± 3 years for FK17and 1780 ± 5 years for TIR18) by manual and automatic multivariable layer counting and volcanic tie points validation. The SMB is calculated after correction for vertical strain rates.</p> <p>A detailed description of the measurement procedures, data treatments and uncertainties can be found in: Wauthy S., Tison, J.-L., Inoue, M., El Amri, S., Sun, S., Claeys, P., and Pattyn, F.: Physico-chemical properties of the top 120 m of two ice cores in Dronning Maud Land (East Antarctica): an open window on spatial and temporal regional variability of environmental proxies, submitted to Earth System Science Data (ESSD).</p> <p>These new records can be compared to those from other coastal ice cores in DML and to regional or global model results, and represent a great opportunity for further studies addressing the mechanisms behind SMB spatial and temporal variability in East Antarctica.</p> <p>The study was funded in the framework of the Mass2Ant project, contract n° BR/165/A2 by the Belgian Science Policy BELSPO.</p>
Nd and Sr isotope compositions of debris from the basal ice of the Byrd ice core, central West Antarctica
<p>This dataset comprises of Nd and Sr isotope compositions of debris melted from three intervals of basal ice from the Byrd ice core. Measurements were performed on the <75 micron fractions, both with and without treatment in a leaching solution designed to remove authigenic coatings, as well as a rhyolite cobble. The ice core the debris was extracted from was drilled at 80<i><strong>°</strong></i> 0.1'S, 119<i><strong>°</strong></i> 31.0'W at Byrd Station, West Antarctica, in January 1968.</p>
Hornblende 40Ar-39Ar data from debris from the basal ice of the Byrd ice core, central West Antarctica
<p>This dataset comprises of hornblende 40Ar/39Ar ages. Hornblende grains were picked from debris melted from three intervals of basal ice from the Byrd ice core. We include data for all 129 40Ar/39Ar dated hornblende grains, but note that only ages when an 5.0E-18 Mol 39Ar threshold was exceeded are considered reliable (n = 33) and that data from grains with less than 1.5E-17 Mol 39Ar should be interpreted with caution. The ice core the debris was extracted from was drilled at 80<i><strong>°</strong></i> 0.1'S, 119<i><strong>°</strong></i> 31.0'W at Byrd Station, West Antarctica, in January 1968.</p>
Chemical and sediment characteristics of ice cores collected from the ablation zones of Canada, Commonwealth, Howard, Hughes, and Seuss Glaciers in the McMurdo Dry Valleys, Antarctica from 2015 to 2019
This data package contains chemical and sediment characteristics of ice cores collected from the ablation zones of five glaciers in Taylor Valley, located in the McMurdo Dry Valleys region of Antarctica, during the 2015-16, 2016-17, 2017-18, and 2018-19 austral summers. Specifically, shallow ice cores were collected from the ablation zones of Hughes, Howard, Seuss, Commonwealth, and Canada Glaciers in order to characterize the spatial and temporal evolution of ice chemistry and sediment concentration across Taylor Valley. Cores were collected in triplicate from each sampling location and measured 79 mm in diameter and up to 1 m in depth. Cores were sectioned in 5 cm (0-25 cm depth) and 25 cm increments (25 cm to the maximum depth of the core) prior to analyzing chemical and sediment characteristics.
Data to support: Anthropogenic influence on tropospheric reactive bromine since the pre-industrial: Implications for ice-core bromine trends
<p>Tropospheric reactive bromine (Br<sub>y</sub>) influences the oxidation capacity of the atmosphere by acting as a sink for ozone and nitrogen oxides. Aerosol acidity plays a crucial role in Br<sub>y</sub> abundances through acid-catalyzed debromination from sea-salt-aerosol, the largest global source. Bromine concentrations in a Russian Arctic ice-core, Akademii Nauk, show a 3.5-fold increase from pre-industrial (PI) to the 1970s (peak acidity, PA), and decreased by half to 1999 (present day, PD). Ice-core acidity mirrors this trend, showing robust correlation with bromine, especially after 1940 (<em>r</em>=0.9). Model simulations considering anthropogenic emission changes alone show that atmospheric acidity is the main driver of Br<sub>y</sub> changes, consistent with the observed relationship between acidity and bromine. The influence of atmospheric acidity and Br<sub>y</sub> should be considered in interpretation of ice-core bromine trends.</p>
RESICE - Reusability-targeted Enriched Sea Ice Core Database - Interactive data2source Traceability
<div> <div> <p>The <em>interactive_data2source_traceability.svg</em> file illustrates data and metadata availability as well as their relation to their original sources for 287 sea ice cores that are part of the <a title="RESICE" href="https://doi.org/10.5281/zenodo.10866346" target="_blank" rel="noopener">Reusability-targeted Enriched Sea Ice Core Database (RESICE)</a> as it is published in Zenodo.</p> <p>(a) shows the availability of selected data and metadata features (x-axis) for each sea ice core as indexed on the y-axis. The color map indicates the type of availability. Primary availability refers to data or metadata extracted directly from the data set. Secondary availability refers to data or metadata are extracted from articles or reports that provide supplementary information about the data sets. Tertiary availability means that additional resources unrelated to the data sets, such as instrument manuals, were used to obtain the metadata of interest.</p> <p>(b) allows to trace the data and metadata collected per RESICE sea ice core back to their original data sources. Gray dots indicate the sea ice core - again as indexed on the y-axis. Green, orange and pink dots represent primary sources (data sets), secondary sources (articles and expedition reports) and tertiary sources (instrument manuals). <br>Each of the dots is interactive, so you can click on it, and it will link you to the original doi or url of the source or to the YAML file in the RESICE living database provided on gitLab.</p> <p>The code used to generate this figure is available in the <a title="pyresice " href="https://doi.org/10.5281/zenodo.11198658" target="_blank" rel="noopener">pyresice</a> Python package available on <a title="https://git.rwth-aachen.de/mbd/pyresice" href="https://git.rwth-aachen.de/mbd/pyresice">GitLab</a>.</p> </div> </div>
RESICE - Reusability-targeted Enriched Sea Ice Core Database - Part B
<div> <div> <div> </div> RESICE is described in detail in the article <em>Reusability-targeted enrichment of sea ice core data</em> published on 2025-03-20 in Scientific Data (DOI: <a href="https://doi.org/10.1038/s41597-025-04665-x" target="_blank" rel="noopener">10.1038/s41597-025-04665-x</a>). This is Part B of RESICE. <em>RESICE_PartB.csv</em> contains all data including profile data (several rows per core), RESICE_PartB_cores.csv provides all data excuding profile data (one row per core) and <em>sources_PartB.csv</em> provides a list of all sources. The database including its <a title="RE-SICE Part A" href="https://www.doi.org/10.5281/zenodo.14745035" target="_blank" rel="noopener">Part A</a> is described in the <a title="RE-SICE General Information" href="https://www.doi.org/10.5281/zenodo.14744912" target="_blank" rel="noopener">general information.</a> Part A and Part B had to be separated due to different licenses of the orginal data sources.</div> </div>
Sea ice core temperature and salinity data collected during the 2022 SCALE Winter Cruise
Open the record for dataset details and reuse information.
LA_CRDS_WATER_ISOTOPE_ICE_CORES_RAW_DATA
<p>Raw data from LA-CRDS (Laser Ablation - Cavity Ring Down Spectroscopy) measurements on water isotope ice standards and ice core samples that were conducted at Ca'Foscari University of Venice.</p> <p>LA: Analyte Excite+, Teledyne Photon Machines, Bozeman MT, USA</p> <p>CRDS Water Isotope Analyzer: L-2130i, PICARRO, Santa Clara CA, US</p>
Compilation of δO2/N2 records, and accumulation rate and temperature reconstructions from various polar ice cores
<p>Compilation of δO2/N2 records, and accumulation rate and temperature reconstructions from various polar ice cores. The first file 'Compilation_Acc_T_2024.xlsx' contains published temperature and accumulation rate reconstructions which were used to make Figure 3 in the associated paper. The datasets are included as published (i.e., no interpolation onto age or depth scales). Depth/age ranges considered in study are indicated in Table 3 in associated paper. The second file 'Compilation_O2N2_2024.xlsx' contains published and unpublished δO2/N2 data. </p>
micro CT scan of Ice core, publication DOI:10.1109/TGRS.2023.3334867
<p>The dataset is used in the paper:</p> <p><strong>Bagherzadeh, Faramarz, et al. "Ice-Core Micro-CT Image Segmentation With Deep Learning and Gaussian Mixture Model." <em>IEEE Transactions on Geoscience and Remote Sensing</em> 61 (2023): 1-11.</strong><br><strong>DOI:10.1109/TGRS.2023.3334867</strong></p> <p><br>Polar ice cores 2D images of Micro CT scans that could be used for training and testing a deep neural network for image segmentation. This dataset is connected with the corresponding paper:<br>Title: "Ice Core micro-CT Image Segmentation with Deep Learning and Gaussian Mixture Model"</p> <p>There are mainly 3 specimens from Polar regions (snow, firn, and bubbly ice) with 60-micron resolution and a corresponding ground truth per input which was derived from a higher-resolution image with the methodology explained in the article.</p>
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