cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a29k45v0m
title: Stable isotope tree-ring records (Tungsten, Northwest Territories, Canada) 1900- 2003

description: Stable isotope tree-ring records spanning from 1900 to 2003. The isotopic measurements were done using tree-ring samples from a white spruce (Picea glauca [Moench]Voss) forest located at 1145 meters above sea level (m a.s.l) near Tungsten (61.98º North (N); -128-25º West (W)) in the Northwest Territories, Canada. This stable oxygen isotope tree-ring record is mostly related to temperatures variations in spring and summer likely because it reflects the temperature imprint in the stable oxygen isotopes of precipitation. The tree-ring stable oxygen isotope tree-ring record also recorded similar correlation patterns than modeled precipitation delta-O-18 (δ18O) from the National Aeronautics and Space Administration (NASA) Goddard Institute for Space Studies (GISS) ModelE2 isotopically-equipped general circulation model (GCM). However, this shared patterns with significant positive correlations with surface temperature and geopotential height, but no correlations with moisture transport, only occurred in spring and summer when water matters more for trees. Overall, this stable oxygen isotope tree-ring record reflects the same significant large-scale climate patterns as stable oxygen isotopes in spring-summer precipitation and show great potential for reconstructing summer temperature variability and past atmospheric dynamics. The stable isotopes were generated at the Lamont-Doherty Earth Observatory (LDEO) of Columbia University (New York, United State of America (USA)) using the proceedings of cellulose extraction and measurements of stable isotopes described in Andreu-Hayles et al (2019). Andreu-Hayles, L., Levesque, M., Martin-Benito, D., Huang, W., Harris, R., Oelkers, R., Leland, C., Martin-Fernández, J., Anchukaitis, K.J. and Helle, G. (2019) A high yield cellulose extraction system for small whole wood samples and dual measurement of carbon and oxygen stable isotopes. Chemical Geology, 504, 53-65.
DOI: 10.6084/m9.figshare.16432515
title: Panel_data_forest_carbon_projects_Africa

description: This is the accompanying data for the article titled "Are forest carbon projects in Africa green but mean?: A mixed methods analysis" DOI: https://doi.org/10.1080/17565529.2022.2054400 <br>
DOI: 10.18739/a25t3g15s
title: Discrete water samples collected from the Conductivity-Temperature-Depth rosette at specific depths, Northern Bering Sea to Chukchi Sea, 2018

description: The Pacific sector of the Arctic Ocean is experiencing major reductions in seasonal sea ice extent and increases in sea surface temperatures. One of the key uncertainties in this region is how the marine ecosystem will respond to seasonal shifts in the timing of spring sea ice retreat and/or delays in fall sea ice formation. Variations in upper ocean water hydrography, planktonic production, pelagic-benthic coupling and sediment carbon cycling are all influenced by sea ice and temperature change. To more systematically track the broad biological response to sea ice retreat and associated environmental change, an international consortium of scientists have developed a coordinated Distributed Biological Observatory (DBO) that includes selected biological measurements at multiple trophic levels, along with satellite and mooring measurements. The DBO currently focuses on five regional biological "hotspot" locations along a latitudinal gradient that allows for consistent sampling and monitoring at five biologically productive locations across a latitudinal gradient: DBO 1 (SLIP)-south of St. Lawrence Island (SLI), DBO2 (Chirikov)-north of SLI, DBO3 (southern Chukchi Sea), DBO4-NE Chukchi Sea,and DBO5-Barrow Canyon.
DOI: 10.6084/m9.figshare.19411688
title: ctype_dor.csv

description: data
DOI: 10.6084/m9.figshare.19411688.v1
title: ctype_dor.csv

description: data
DOI: 10.18739/a2222r71z
title: Discrete water samples collected from the Conductivity-Temperature-Depth rosette at specific depths, Northern Bering Sea to Chukchi Sea, 2019

description: The Pacific sector of the Arctic Ocean is experiencing major reductions in seasonal sea ice extent and increases in sea surface temperatures. One of the key uncertainties in this region is how the marine ecosystem will respond to seasonal shifts in the timing of spring sea ice retreat and/or delays in fall sea ice formation. Variations in upper ocean water hydrography, planktonic production, pelagic-benthic coupling and sediment carbon cycling are all influenced by sea ice and temperature change. To more systematically track the broad biological response to sea ice retreat and associated environmental change, an international consortium of scientists have developed a coordinated Distributed Biological Observatory(DBO) that includes selected biological measurements at multiple trophic levels, along with satellite and mooring measurements. The DBO currently focuses on five regional biological "hotspot" locations along a latitudinal gradient that allows for consistent sampling and monitoring at five biologically productive locations across a latitudinal gradient: DBO 1 (SLIP)-south of St. Lawrence Island (SLI), DBO2 (Chirikov)-north of SLI, DBO3 (southern Chukchi Sea), DBO4-NE Chukchi Sea,and DBO5-Barrow Canyon.
DOI: 10.18739/a2x921k7t
title: Timelapse photos of Johns Hopkins Inlet iceberg habitat, Glacier Bay National Park, Alaska, 2019

description: Data are available at: https://arcticdata.io/data/10.18739/A2JQ0SW5Z/ Tidewater glacier fjords are highly dynamic environments that are affected by several glaciological and oceanographic processes: (i) subglacial discharge creates upwelling plumes that drive estuarine circulation and promote submarine melting of glaciers and icebergs, (ii) iceberg calving, which is affected by submarine melting, is a stochastic energy source that mixes near-glacier waters and produces waves that crash on shore and cause icebergs to capsize, and (iii) motion of icebergs and fjord waters are affected by winds, tides, and subglacial discharge. Numerous species reside in tidewater glacier fjords, including harbor seals, which seasonally aggregate in fjords and use ice habitat for critical life functions including pupping, molting, and foraging. Seals that haul-out on icebergs during the pupping and molting seasons take longer and deeper dives for feeding than those that use terrestrial haul-outs, but may acquire higher quality food. Additionally, icebergs do not flood during high tide, which increases the amount of time that seals can remain hauled-out and that pups can spend nursing, thus increasing energetic intake. Many basic questions remain unanswered, and the energy costs of coping with a constantly evolving landscape are unknown. This project addresses these deficiencies by investigating the temporal and spatial variability of seal habitat in Johns Hopkins Inlet, Glacier Bay, by synthesizing aerial surveys with high-rate time-lapse photogrammetry. This dataset consists of high-rate (1 photo per minute) time-lapse photos of Johns Hopkins Inlet that were acquired in summer 2019, at the coordinates of the camera locations.
DOI: 10.18739/a2sn0154f
title: Sediment freeze-on during Heinrich events; Laurentide; modeling study 2019

description: Anomalous coarse-grained sediment layers beneath the North Atlantic likely originated from sediment freeze-on to the base of ice sheets during the last glacial period. These layers represent periods of extreme ice discharge, called Heinrich events, and are variously attributed to ice stream flow instability, ice shelf collapse, or enhanced terminus melting due to ocean warming. In the published paper by Meyer, Robel and Rempel "Frozen fringe explains sediment freeze-on during Heinrich events", Earth and Planetary Science Letters 524 (2019) 115725, we study the processes controlling how sediment freezes on to the base of ice streams and predict the volume of sediment conveyed by icebergs during a Heinrich event. This dataset contains the Matlab scripts and model output used to produce the data displayed in that paper. The local thickness of frozen sediment is sensitive to the heat flux at the ice-bed interface and the water pressure, both of which also contribute to the controls on basal friction; as the basal water pressure increases, both the frozen sediment thickness and the basal friction decrease. The sediment discharged during a Heinrich event must have frozen on to the ice during the inter-Heinrich period. As the Heinrich event proceeds, the frozen sediment melts off the base of the ice stream, indicating that the thickness of sediments deposits in the North Atlantic may not reliably constrain Heinrich event duration. Choosing reasonable parameters corresponding to the Hudson Strait Ice Stream, our model of sediment freeze-on and discharge is consistent with observational estimates of Heinrich event sediment discharge volume.
DOI: 10.18739/a2nv99c17
title: Effects of sediment characteristics on gas hydrate accumulation; continental margins and permafrost; model results from 2018

description: The occurrence of methane hydrate in marine reservoirs often correlates with the physical properties of the host sediments. High hydrate saturations (greater than 60% of the pore volume) found in association with coarser-grained strata have been attributed to both enhanced advective transport through more permeable sediment layers and to perturbations in phase equilibrium related to pore-space geometry that results in increased diffusive transport. To assess the relative importance of these mechanism in controlling hydrate occurrence, we developed a 1D (1-dimensional) model for hydrate growth along dipping, coarse-grained layers embedded in a fine-grained sediment package. We explicitly account for pore-size effects on methane solubility and permeability-driven variations in fluid flux. We show how the vertical distribution of hydrate varies in response to changes in grain size and rates of fluid advection, sedimentation, and in situ methane production. As an example, we use our model to simulate centimeter-scale variations in hydrate saturation observed at Walker Ridge Block 313, Hole H in the Gulf of Mexico. The model m-files and parameter text files are contained in this dataset. The results from this study are published by Brandon P. van der Beek and Alan W. Rempel as “On the importance of advective versus diffusive transport in controlling the distribution of methane hydrate in heterogeneous marine sediments”, doi: 10.1029/2017jb015298, Journal of Geophysical Research, 2018.
DOI: 10.25345/c5251fp6g
title: MassIVE MSV000089119 - The Checkpoint Inhibitor PD-1H/VISTA Functions as an MMP-13 Receptor on Osteoclasts and Mediates Multiple Myeloma Bone Disease
title: Multiple myeloma (MM) bone disease is characterized by the development of osteolytic bone lesions. Recent work identified matrix metalloproteinase 13 (MMP-13) as a novel fusogen expressed by MM cells that, in turn, induces osteoclast activation independent of its proteolytic activity. While the mechanism by which the metalloprotease signals osteoclasts has remained the subject of conjecture, we now report the identification of the checkpoint protein, programmed death-1 homolog (PD-1H/VISTA) as the bona fide MMP-13 receptor expressed on both pre- and mature osteoclasts. Silencing PD-1H or using Pd-1h-/- bone marrow cells abrogated the MMP-13-induced upregulation of ERK1/2-NFATc1-DC-STAMP signaling, the induction of osteoclast fusion and the increase in bone-resorptive activity. Further studies revealed that the intracellular domain of PD-1H interacts with the actin cytoskeleton of OCLs and plays a necessary role in supporting c-Src activation as well as sealing zone formation. The critical role of PD-1H in the development of lytic bone lesions in MM was confirmed using a Pd-1h-/- myeloma bone disease mouse model wherein MM cells injected into Pd-1h-/-Rag2-/- ameliorated bone destruction relative to Pd-1hwtRag2-/- mice. These results suggest that targeting the MMP-13/PD-1H axis may represent a novel approach for the treatment of MM-associated osteolysis.
DOI: 10.18739/a2j38kj88
title: Effects of aufeis on the structure and function of Arctic river-floodplain ecosystems, Alaska, 2016-2017

description: The goal of this study is to assess the potential effects of aufeis (i.e., river icings) on the structure and function of arctic river-floodplain ecosystems in a warming climate. Aufeis are massive accumulations of ice that are features of many arctic rivers. They form during freeze-up when thickening surface ice causes local overflows. Successive cycles of overflow result in accumulations of enormous volumes of ice, with aufeis on some Alaskan rivers attaining thicknesses of 3-5 meters, covering more than 20 square kilometers, and storing as much as 30% of the annual river discharge. Although aufeis have been studied by hydrologists and are known to be required for winter and spawning habitat for some fish, understanding of their ecology is poor. We propose that aufeis be viewed as winter oases due to their wet bases that supply water and heat to otherwise frozen habitats. Aufeis function as summer oases by providing a stable supply of water to hyporheic and downstream habitats. These data come from intensive study of the Kuparuk River aufeis field. We collected subsurface invertebrate community and water chemistry data during 12-17 August 2017 from 45 ~0.7-meter (m) deep ground-water wells that were installed in the aufeis field. These data are were collected coincidentally with those provided in: doi: 10.18739/A20P0WR15.
DOI: 10.18739/a2db7vr44
title: Carbon and Nitrogen Percent Compositions of Vegetation in Arctic Alaska, 2017-2019

description: Sample weights and carbon and nitrogen percentages from vegetation collected by destructive biomass sampling across the general year-round range of the Alaskan Central Arctic Caribou Herd (CAH), June 2017 - September 2019. These data were collected as a part of the National Science Foundation funded project "Nutritional Landscapes of Arctic Caribou: Observations, Experiments, and Models Provide Process-Level Understanding of Forage Traits and Trajectories" and have been used to produce estimates of vegetation biomass and aboveground nutrient pools throughout the CAH's range. The goals for the project as a whole were to further develop our understanding of the drivers of forage quality and quantity across the Alaskan arctic, the CAH's use of their landscape through space and time, and the possible ways that forage quality will vary under likely climate change scenarios.
DOI: 10.6084/m9.figshare.19411691
title: Untitled Item

description: data
DOI: 10.6084/m9.figshare.19411691.v1
title: Untitled Item

description: data
DOI: 10.18739/a28k74x98
title: Multi-decadal Glacial Lake Inventory in the Alaska Region between 1984 and 2019

description: This dataset is an inventory of all lakes within 1 km (kilometer) of a glacier in Alaska and northwest Canada (Randolph Glacier Inventory (RGI) Region 01) for four different time periods: 1984-1988, 1997-2001, 2007-2011, and 2016-2019. Outlines were created from ~5-year Landsat composites made in Google Earth Engine. Lakes are identified using supervised classification, thresholding, and manual verification. For each lake, area, dam type, topological location, and associated RGI glacier ID (identification) are reported. This time-varying inventory was created to help understand historic changes in ice-marginal lakes in Alaska and the role of dam type and position in characterizing lake trends.
DOI: 10.6084/m9.figshare.19411667
title: Basic breeding standard for white Guinea yams

description: Database regarding agronomic characteristics and food qualities of popular white Guinea yam landraces with high market value
DOI: 10.6084/m9.figshare.19411667.v1
title: Basic breeding standard for white Guinea yams

description: Database regarding agronomic characteristics and food qualities of popular white Guinea yam landraces with high market value
DOI: 10.18739/a2qn5zc71
title: Branched glycerol dialkyl glycerol tetraether (brGDGT) data from Lake 578, Norse "Eastern Settlement" southern Greenland, 2016-2019

description: This dataset includes branched glycerol dialkyl glycerol tetraether (brGDGT) fractional abundances from sediment core, surface sediments, settling particulate matter, and soils of Lake 578 (61.08 degrees North (° N), 45.61 degrees West (° W)), southern Greenland. BrGDGTs are lipids thought to be biosynthesized by anaerobic bacteria. These compounds are abundant in lake sediments and potentially can be used as proxies for evaluating past environmental conditions. To improve the application of the brGDGT paleothermometer in high latitudes, we examine brGDGTs distribution from Lake 578, located in southern Greenland. In July 2016, a 70 centimeter (cm) percussion core was collected from Lake 578, and the sediment trap system was deployed. Sediment traps were assembled using a 25.5 cm diameter funnel with a 100 milliliter (mL) centrifuge tube attached at the bottom and allowed to accumulate material for 1 year. Three sediment traps were placed at 5 meter (m), 10 m, and 14 m depths. Each summer (2017, 2018, and 2019) the sediment traps were recovered, the centrifuge tubes exchanged with new ones, and the traps re-deployed at the same location. 5 surface sediment samples were collected with an Ekman grab sampler in July 2018. 13 catchment soil samples were collected from the Lake 578 watershed area. Sediment trap samples, surface sediment samples, and soil samples were frozen until analysis. The sediment core was stored at 4 degrees Celsius (°C) until analysis. All brGDGT samples were analyzed on an Agilent 1260 UHPLC (ultrahigh-performance liquid chromatography) coupled to an Agilent 6120 MSD (mass selective detector) with the newer methods of Hopmans et al. (2016) to separate the compounds.
DOI: 10.18739/a2kw57k38
title: Currents, Ice Velocity, Temperature, and Salinity from moorings around Hanna Shoal, Chukchi Sea, 2012-2014

description: These data were collected as part of the physical oceanographic component of the Chukchi Sea Offshore Monitoring in Drilling Area (COMIDA) Hanna Shoal Ecosystem Study. Hanna Shoal is a topographic feature in the northeastern Chukchi Sea that is both shallow (as little as 20m deep) and biologically productive. The earlier COMIDA: Chemistry and Benthos (CAB) study identified it as an area at which to focus additional ecological monitoring. To define the circulation around the Shoal, Acoustic Doppler Current Profilers (ADCPs) were deployed on six moorings on its northwest and northeast slopes on the 40, 50, and 60 m isobaths. These were initially deployed in August 2012 from the USCG Healy. They were then recovered and re-deployed in September 2013 from the Norseman II under the direction of Chief Scientist Peter Winsor (UAF). The same vessel and Chief Scientist conducted the recoveries in September 2014. Each mooring included a MicroCat temperature/conductivity/pressure (CTD) recorder mounted about 3 m above bottom. Two moorings, HS-NE_50m and HS-NE_60m in 2012-13, additionally included an ISCAT (upper level temperature-salinity-pressure sensors in a trawl resistant housing designed to survive impact by ice keels) at ~25 and 30 m depth, respectively. Circulation around Hanna Shoal was unknown, even though the area is biologically important. Moorings were placed on the northwest and northeast slope in order to detect the clockwise flow around the Shoal predicted by model results. The ISCAT and MicroCat pairs on these moorings were designed to measure changes in water column stratification.
DOI: 10.6069/39p3-3077
title: The addition of FAIMS Increases Targeted Proteomics Sensitivity from FFPE Tumor Biopsies

description: Mass spectrometry-based targeted proteomics allows objective protein quantitation of clinical biomarkers from a single section of formalin-fixed, paraffin-embedded (FFPE) tumor tissue biopsies. We combined high-field asymmetric waveform ion mobility spectrometry (FAIMS) and parallel reaction monitoring (PRM) to increase assay sensitivity. The modular nature of the FAIMS source allowed direct comparison of the performance of FAIMS-PRM to PRM. Limits of quantitation were determined by spiking synthetic peptides into a human spleen matrix. In addition, 20 clinical samples were analyzed using FAIMS-PRM and the quantitation of HER2 was compared with that obtained with the Ventana immunohistochemistry assay. FAIMS-PRM improved the overall signal-to-noise ratio over that from PRM and increased assay sensitivity in FFPE tissue analysis for four (HER2, EGFR, cMET, and KRAS) of five proteins of clinical interest. FAIMS-PRM enabled sensitive quantitation of basal HER2 expression in breast cancer samples classified as HER2 negative by immunohistochemistry. Furthermore, we determined the degree of FAIMS-dependent background reduction and showed that this correlated with an improved lower limit of quantitation with FAIMS. FAIMS-PRM is anticipated to benefit clinical trials in which multiple biomarker questions must be addressed and the availability of tumor biopsy samples is limited.
DOI: 10.18739/a2g44hr8b
title: HELiX Uncrewed Aircraft System data from the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) campaign, A0 level data

description: A0 level data from HELiX Uncrewed Aircraft System correspond to the raw data in Matlab format collected in the Central Arctic Ocean during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. Synchronized and quality-controlled B1 level data are available in the Arctic Data Center. Users are encouraged to primarily use the B1 level data for analysis (doi:10.18739/A2GH9BB0Q). Raw data are the initial inputs in the processing routines to obtain the B1 and A1 level data (doi:10.18739/A2M90243X). Matlab files include hemispheric irradiance measurements from Kipp and Zonen pyranometers and thermodynamic parameters from Vaisala RSS421 sensors. Autopilot positions and attitudes, along with gimbal attitudes are also provided. Each field of measurements has its own time stamped based on a common clock and associated acquisition frequency. As no Coordinated Universal Time (UTC) time was provided in the FlexLogger acquisition files, the additional A0_PixHawk Matlab files obtained directly from the PixHawk autopilot are used to add UTC time for B1 level data. Please contact the authors if you need to use this dataset. More information on the data and method can be found in de Boer, G. R. Calmer, G. Jozef, J. Cassano, J. Hamilton, D. Lawrence, S. Borenstein, A. Doddi, C. Cox, J. Schmale, A. Preußer and B. Argrow (2022): Observing the Central Arctic Atmosphere and Surface with University of Colorado Uncrewed Aircraft Systems, Nature Scientific Data, in prep.
DOI: 10.34820/fk2/wac5fd/f1aiaj
title: Alur Penelitian Evaluasi Eye Tracking.pdf

description: :unav
DOI: 10.34820/fk2/wac5fd
title: Alur Penelitian Evaluasi Eye Tracking terhadap Persepsi Warna dan Gambar pada Primary Display Panel Kemasan

description: Dataset ini menggambarkan flow diagram atau alur penelitian Evaluasi Eye Tracking terhadap Persepsi Warna dan Gambar pada Primary Display Panel Kemasan. Secara garis besar, kegiatan penelitian meliputi tiga tahap. Tahap I diawali studi pendahuluan (merumuskan masalah dan menyusun landasan teori). Tahap II dengan melakukan eksperimen eye-tracking. Tahap III (pengolahan data kualitatif), termasuk melakukan wawancara.
DOI: 10.6084/m9.figshare.19106990
title: Sample information and NMR assignments

description: Assignment and sample information. Experiment name and number indicates the groupings of samples. Multiple databases were used for the assignment of metabolites; Chenomx NMR suite software (Chenomx Inc, Canada), Human Metabolome Database (HMDB) and Biological Magnetic Resonance Data Bank (BMRB).