cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a2959c883
title: EGRIP water isotope data 21.5 m (meters) to 2120.7 m depth at 5 cm resolution, from continuous flow analysis (CFA).

description: This data set is part of a joint international effort for the East GReenland Ice-core Project (EGRIP), which has retrieved an ice core by drilling through the Northeast Greenland Ice Stream (NEGIS, 75.63°N (North), 35.98°W (West)). Ice streams are responsible for draining a significant fraction of the ice from the Greenland Ice Sheet (GIS), and the project was developed to gain new and fundamental information on ice stream dynamics, thereby improving the understanding of how ice streams will contribute to future sea-level change. The drilled core also provides a new record of past climatic conditions from the northeastern part of the GIS. The project has many international partners and is managed by the Centre for Ice and Climate, Denmark with air support carried out by US ski-equipped Hercules aircraft managed through the US (United States) Office of Polar Programs, National Science Foundation. As of May 2022, approximately 2099.2 m (meters) of ice core have been recovered from the combined efforts of drilling operations in 2017, 2018, and 2019. Here we present records of stable isotopes of oxygen and hydrogen from 21.5 meters to 2120.7 m depth. Bedrock is estimated to be at a depth of approximately 2550 m; the remaining ice is expected to be recovered in the 2022 and 2023 field seasons. The data product presented here is supported by the National Science Foundation project: Collaborative Research: The fingerprint of abrupt temperature events throughout Greenland during the last glacial period. Award # 1804098.
DOI: 10.18739/a29g5gf7p
title: Thermal state of permafrost in North America - annually observed ground temperatures, 2021

description: This work coordinates data collection using standard equipment and protocols at North American and Russian sites. These data sets provide the baseline to assess the future rates of change in near-surface permafrost temperatures and permafrost boundaries, and to provide spatial data for validation of climate scenario models and temperature reanalysis approaches. The work represents the United States (US) contribution to the ongoing activities of the Global Terrestrial Network for Permafrost that obtains temperatures in a large number of globally distributed monitoring sites in order to provide a snapshot of permafrost temperatures in both time and space. The US National Science Foundation funded this work with award #0520578, #0632400, #0856864, and #1304271.
DOI: 10.18739/a29g5gf85
title: Reflectance measurements from within and around a supraglacial stream in Southwest Greenland (67.15N, 50.00W) collected in August 2019

description: This dataset includes two files: 1. ASD_SedCover_2019_Published_Reflectance; Reflectance measurements in each wavelength between 350-2500 nm (nanometers) for 41 sites. 2. ASD_SedCover_2019_Published_Summary; GPS locations, sediment cover, and average reflectance values for each site. Measurements were georeferenced using a Trimble R7 PPK (post-processed kinematic) GNSS (Global navigation satellite system) and water depth was recorded with a ruler when applicable. Images of the sample area were collected in triplicate and converted to black and white to determine the percent sediment cover for the observation window. These measurements were used to deduce the relationship between sediment cover and reflectance. More details are provided in Leidman et al. (2023). Reference: Leidman, S. Z., Rennermalm, Å. K., Muthyala, Skiles, S. M., and Getraer, A. (2023). Intra-Seasonal Variability in Supraglacial Stream Sediment on the Greenland Ice Sheet. Frontiers of Earth Science: Cryospheric Science.
DOI: 10.18739/a29s1km68
title: Maps of contemporary subsistence land use in rural Interior Alaska derived from predictive models

description: This geospatial dataset provides model-based predictive maps of subsistence land use in rural Interior Alaska. Subsistence harvesting of wild resources is crucial to the well-being of Alaska Natives and rural Alaskans. The development of these community and regional scale maps was intended to improve our understanding of the spatial extent and patterns of subsistence practices, to support communication among land users, and to facilitate predictions of the human impacts from changes in resource availability, climate and environment, land use, and policy. Logistic regression models for predicting subsistence land use were developed using publicly-available maps of documented subsistence use areas assembled by Alaska Department of Fish and Game for 30 communities (Neufeld et al. 2019). Separate models were used for remote communities and road-connected communities. The best-fit models of subsistence land use probability included the terms: distance to community, distance to main travel corridors (rivers for remote communities; roads and rivers for road-connected communities), distance to lakes (for remote communities only), and community population size. The models were applied to 64 rural communities throughout the Interior region to generate probability maps of subsistence land use at the community level (file names: probability_subsistence_*communitytype*_*CommunityName*.tif). A regional probability map of subsistence land use was constructed using the maximum probability value per pixel from community-level maps (file name: probability_subsistence_InteriorAK.tif). Maps of predicted subsistence use areas were created by classifying the community-level probability maps into used and unused areas (file name: classification_subsistence_InteriorAK.zip). Classification accuracy ranged from 83-86%. Results suggest a large spatial extent (353,771 square kilometers (km2)) of subsistence land use in Interior Alaska, comprising ~60% of the region’s land area. These data were produced as part of a study “Geospatial patterns and models of subsistence land use in rural Interior Alaska” by D. R. N. Brown, T. J. Brinkman, G. Neufeld, L. Navarro, C. L. Brown, H. S. Cold, B. L. Woods, and B. L. Ervin published with Ecology and Society (Brown et al., 2022), https://www.ecologyandsociety.org/vol27/iss2/art23/.
DOI: 10.18739/a29s1km7r
title: Glaumbær: Overview and assessment of the results of the 2001-2014 investigations

description: This report outlines the broad results of the 2001-2014 work at Glaumbær in Skagafjörður, North Iceland. The project was a collaborative effort between archeologists from United States and The Skagafjörður Heritage Museum. We describe the two habitation areas of Glaumbær: Upper Glaumbær and Lower Glaumbær which are spatially and temporally distinct. That these two areas are distinct in time and space imply that they are all part of a single unit that has relocated. The older Viking Age remains at Lower Glaumbær consist of a main long house, its associated midden, and an outbuilding, potentially a barn. The earliest AMS date was from a charred barley seed recovered from the limited excavations, which yielded a calibrated range of AD 890–982 (a midpoint of AD 936). The longhouse (Icel. skáli), midden, and outbuilding at Lower Glaumbær were abandoned well before the 1104 tephra layer fell as Lower Glaumbær was probably occupied for a little over 100 years. At Upper Glaumbær, sometime between AD 1000 and 1104, a midden began forming south of the churchyard and east of the standing turf house. Because no evidence for other structures was identified at Upper Glaumbær (e.g., floors, or walls) it is assumed that this earliest midden at Upper Glaumbær is associated with a structure in the same location as the standing turf structure. Midden deposition shifted to the location of the current visible ash pile soon after the 1104 tephra layer fell. Both of these midden deposits are consistent with long-term occupation in the location of the standing turf structure. However, only the area around the standing turf house south of the churchyard has been archaeologically investigated. Today, the visible structures at Upper Glaumbær consist of the modern church, its churchyard, the standing turf house, its associated ash pile to the southwest. Lower and Upper Glaumbær, attest to a relocation of farmstead activities sometime about 1050, and should be treated as the same archaeological site, representing a continuous occupation in two different discrete locations.
DOI: 10.18739/a29z90d3v
title: A household survey documenting experiences with coastal hazards in a western Alaska community (2021-2022)

description: This survey documents the local experiences of rural indigenous residents experiencing rapid climate change. Residents reported financial and emotional stress, and revealed attitudes towards a referendum like survey on relocation of the village and potential federal buyout directed at either the community as a whole or individual households. The household survey was designed in close collaboration with local research partners including tribal entities, local health authorities, and local village corporation a local landowner and one of 200 village corporations established under the Alaska Native Claims Settlement Act (ANCSA). Survey design followed the tailored design method and was administered in-person by local personnel via hand-held devices that connected to an online survey platform. Respondents received a $20 incentive payment for taking the survey. Responses were collected during summer and fall 2021 attempting a census of the 146 households.
DOI: 10.18739/a2b27ps63
title: Arctic plant biomass and nitrogen by vegetation functional group, northern Alaska, 2017-2019

description: Climate change is progressing rapidly in the Arctic, leading to changes in plant phenology and in the seasonal patterns of plant properties such as tissue nitrogen (N) content and aboveground biomass. The purpose of this study was to understand the environmental controls on seasonality in tissue N and biomass of Arctic vegetation across the North Slope of Alaska, and how these seasonal patterns vary among Arctic plant functional groups (i.e. shrubs, graminoids, forbs, dwarf shrubs, lichens, bryophytes). We sampled vegetation from 71 points over three years (2017-2019), visiting each point three times (June, July, Sept) during one year. Vegetation biomass and tissue N concentration was determined by vegetation functional group at each location for each time of year. This dataset contains vegetation biomass and tissue nitrogen concentration by vegetation functional group (shrub, graminoid, dwarf shrub, forb, lichen, bryophyte). These data were collected at ~75 locations in northern Alaska three times per growing season. A new set of ~25 points was sampled for three years (2017-2019).
DOI: 10.18739/a2b56d58b
title: Vulcan Creek Gage site flow data, Tubutulik River Watershed on the Seward Peninsula, Alaska, 2012-2016.

description: The primary purpose of the Tubutulik Instream Flow Protection Project is to gather discharge and related data to be applied in the protection of fish and wildlife habitat, migration, and propagation flows on Vulcan Creek in the Tubutulik River Watershed. The Watershed produces a variety of Pacific salmon and other fish species important to the Norton Sound area. In addition, the Watershed is located within the Migratory range of the Western Arctic Reindeer Herd which rely on the associated watersheds for habitat and forage needs. Current threats to fish and wildlife habitat within the River’s watershed, however, include uranium mining exploration and other potential mining related activity and associated roads, railroads from mining and related development. As part of the Project, the Traditional Council of the Native Village of Elim is collecting discharge, logger and staff gage data for protection of fish and wildlife habitat, migration, and propagation flows on Vulcan Creek reach located in the Tubutulik River Watershed on the Seward Peninsula of Alaska. Objective - obtain a certificate of reservation for instream flows under the Alaska State Water Code, on Vulcan Creek and other creeks in the Watershed. An instream flow certificate is required for maintaining a specific flow in a portion of stream or water level in a lake. An instream flow reservation can be made to protect fish and wildlife habitat, migration, and propagation; recreation and park purposes; navigation and transportation purposes; and sanitary and water quality purposes. The Vulcan Creek data will be incorporated into an application form and the fee prescribed by 11 AAC (Alaska Administrative Code) 05.260 will be filed with the Department of Natural Resources.
DOI: 10.18739/a2b853k2r
title: Ice-Tethered Profiler Biogeochemical Time-Series Data, Arctic Ocean, 2012-2021

description: The goal of the proposed study is to establish an Arctic Observing Network (AON) for sea surface partial pressure of carbon dioxide (pCO2) and pH in the perennially ice-covered portion of the Arctic Ocean. The carbon cycle is of particular concern in the Arctic because it is unknown how carbon sources and sinks will change in response to warming and the reduction of summer sea ice cover, and whether these changes will lead to increased greenhouse gas accumulation in the atmosphere. Furthermore, the penetration of anthropogenic caron dioxide (CO2) into the Arctic Ocean is leading to acidification with potentially serious consequences for organisms. Little is known about pCO2 and the inorganic carbon cycle in the central Arctic Ocean because most measurement programs to date have focused on the Arctic shelves during the accessible summer period. The investigators propose to use an existing component of the Arctic Observing Network, the Ice-Tethered Profilers (ITP), as platforms for deployment of in situ pCO2 and pH sensors. ITPs are automated profiling systems distributed throughout the perennial Arctic ice pack that telemeter data back to shore: 44 ITPs have been deployed since 2004 and the project is currently slated to continue through 2013. In the proposed work, a total of 6 ITPs will be equipped with CO2 sensors and four of these will also have pH sensors. The sensors will be fixed on the ITP cable ~2-4 meters below the ice. Each unit will include additional sensors for dissolved O2, salinity, and photosynthetically available radiation (and in some cases chlorophyll-a fluorescence) and will be capable of making 12 measurements per day for at least one year. These data, available in near real-time on the ITP web site (www.whoi.edu/itp/), will lead to a better understanding of the Arctic Ocean's role in regulating greenhouse gases and how the ecology of the Arctic will change with warming and acidification. The investigators will also engage in outreach programs including public presentations, podcasts, and school visits. A portion of the budget is also dedicated to the development of a climate-change/ocean acidification exhibit to be displayed in the University of Montana's science museum. The exhibit will reside at the museum for three months, then visit over 15 rural and tribal communities annually over a three year period. Undergraduate students will be recruited to assist with the sensor testing and data analysis, gaining a higher level of technical knowledge than possible through a traditional degree program. These data were collected using in situ sensors for the partial pressure of CO2 (pCO2), pH, dissolved oxygen (DO), photosynthetically available radiation (PAR), temperature, salinity and depth. Sensors were deployed at ~6 meter depth on ice-tethered profilers, in collaboration with Woods Hole Oceanographic Institution (Rick Krishfield and John Toole). Data are available at the website http://www.whoi.edu/page.do?pid=20781.
DOI: 10.18739/a2bk16r0v
title: Pan-Arctic surface water (yearly and trend over time) 2000-2021

description: Surface water change has been documented across the Arctic due to thawing permafrost and changes in the precipitation/evapotranspiration balance. This dataset uses Moderate Resolution Imaging Spectroradiometer (MODIS) data to track changes in surface water across the region over the past two decades. The superfine water index (SWI) is a global water cover index developed specifically for MODIS data and validated in high northern latitudes. Variation in SWI can also track changes in surface water that occur at the sub-MODIS pixel scale (i.e., changes in water bodies smaller a MODIS pixel, ~500 meters (m)). This dataset (1) maps the SWI over pan-Arctic for each year of the MODIS record (2000-2021) and (2) maps the trends in SWI over the same period (i.e., Sen's slope of the pixel-wise SWI vs. time). The spatial resolution of this dataset is ~500 m.
DOI: 10.34740/kaggle/dsv/5058694
title: CelebA Face Recognition Triplets
DOI: 10.18739/a2bn9x444
title: Meteorological and firn temperature data from three weather stations in the percolation zone of southwest Greenland, 2017 - 2019

description: This dataset contains information about data collected by automatic weather stations (AWS) at three sites (Site J, 2040 meters above sea level.; Dye-2, 2120 meters above sea level; EKT, 2360 meters above sea level) in the percolation zone of southwest Greenland between spring 2017 and fall 2019. The stations recorded near-surface air temperature, relative humidity, wind speed and direction, shortwave incoming and reflected radiation, longwave incoming and outgoing radiation, and relative surface height. Subsurface temperatures were measured at 28 depths below the surface. Meteorological variables were sampled every 5 minutes while surface height and subsurface temperatures were sampled every hour. The data series have been quality checked and corrected as necessary. The dataset includes the following files: README.pdf : general metadata of this dataset. It contains information on data availability as well as variables measured at each site. DataCorrection.pdf : metadata regarding the data corrections applied to the AWS data. AWS_SITE_startDATE_endDATE_5min.txt : 5 minutes data. AWS_SITE_startDATE_endDATE_hourly.txt : hourly data. AWS_SITE_startDATE_endDATE_daily.txt : daily data. AWS_SITE_Metadata.pdf : site specific weather station metadata. It contains all the information such as station history, instruments, calibrations, site visits, etc. AWS_SITE_QuickLook.html : interactive html file displaying hourly meteorological data for a quick look (only Site J and EKT).
DOI: 10.18739/a2bn9x45m
title: Northwest Passage Project seawater dataset, July - August 2019, Canadian Arctic Archipelago

description: This data were collected and processed through the Northwest Passage Project, a US National Science Foundation funded program to explore the changing Arctic through an innovative expedition that engaged diverse audiences through real time interactions from sea, a high definition 2-hour documentary, and related community events. The expedition was conducted onboard the Research Vessel Ice Breaker (RVIB) Oden, where undergraduate and graduate students participated in the expedition along with local indigenous representatives, scientists, historians, journalists, and a documentary film crew. We are submitting two seawater datasets: one with in-situ and ex-situ data, and one with the waters composition results. The "NPP.full.dataset.csv" provides information on the following parameters collected from the Canadian Arctic Archipelago water column: Temperature, Salinity, Turbidity, Oxygen isotopes, Nutrients, Particulate Organic Matter (POM) data (e.g., Particulate Organic Carbon (POC), Particulate Organic Nitrogen (PON)), Methane data (e.g., concentrations, isotope ratio C13-CH4, oxidation rates constants). The "NPP.OMP.dataset.csv" provides information on the water mass contribution across the Canadian Arctic Archipelago. Here, we show the raw and standardized parameters used into the Optimal MultiParameter analysis (OMP) (such as, Absolute Salinity, the Arctic Nitrate:Phosphate tracer, and d18O), and the source waters fractions (i.e., Atlantic Water, Pacific Water, Meteoric Water, Sea Ice Meltwater). We also show the residuals of the OMP analysis in fractions. Both the datasets provide unique information on physical and chemical characteristics of the Canadian Arctic Archipelago waters, which will serve as baseline for further investigations.
DOI: 10.18739/a2br8mh6z
title: Wildland fire reburning trends across the US West suggest only short-term negative feedback and differing climatic effects, 2000

description: Wildfires are a significant agent of disturbance in forests and highly sensitive to climate change. Short-interval fires and high severity (mortality-causing) fires in particular, may catalyze rapid and substantial ecosystem shifts by eliminating woody species and triggering conversions from forest to shrub or grassland ecosystems. Modeling and fine-scale observations suggest negative feedbacks between fire and fuels should limit reburn prevalence as overall fire frequency rises. However, while we have good information on reburning patterns for individual fires or small regions, the validity of scaling these conclusions to broad regions like the US West remains unknown. Both the prevalence of reburning and the strength of feedbacks on likelihood of reburning over differing timescales have not been documented at the regional scale. Here we show that while there is a strong negative feedback for very short reburning intervals throughout wildland forests of the Western US, that feedback weakens after 10–20 years. The relationship between reburning intervals and drought diverges depending on location, with coastal systems reburning quicker (e.g. shorter interval between fires) in wetter conditions and interior forests in drier. This supports the idea that vegetation productivity—primarily fine fuels that accumulate rapidly (&lt;10 years)—is of primary importance in determining reburn intervals. Our results demonstrate that while over short time intervals increasing fires inhibits reburning at broad scales, that breaks down after a decade. This provides important insights about patterns at very broad scales and agrees
DOI: 10.18739/a2bz6194k
title: Computed Tomography (CT), X-Ray Fluorescence (XRF), Multi-Sensor Core Logging (MSCL) data and reconstructions from Petermann Fjord Sediment Cores (Cruise OD1507), 2015-2018

description: Data sets include X-Ray Fluorescence (XRF), Computed Tomography (CT), and Multi-Sensor Core Logger (MSCL) data for cores collected from Petermann Fjord during the PETERMANN15 expedition of the Swedish Icebreaker Oden (OD1507). These data were collected to investigate the stratigraphy of sediments found in Petermann Fjord and to investigate paleoenvironmental signals recorded in the sediments. Also included are Fjord Ice-Rafted Debris (IRD) stacks, Holocene Petermann Ice Tongue reconstruction, particle size specific magnetic susceptibility data, and the outer Petermann Fjord composite Ti/Ca record, used in the discussion of the Holocene variations of the Petermann Ice Tongue by Reilly et al. (2019). XRF data includes data for OD1507 cores, 02UW, 03UW, 03PC, 03TC, 04GC, 06PC, 10PC, 40TC, 40PC. CT number data and CT derived IRD counts includes data for OD1507 cores, 02UW, 03UW, 03PC, 03TC, 04GC, 06PC, 08GC, 10PC, 40TC, 40PC. MSCL data includes data for OD1507 cores, 01UW, 02UW, 03UW, 01GC, 03PC, 03TC, 04GC, 06PC, 06TC, 08GC, 10PC, 10TC, 11GC, 12GC, 14GC, 37PC, 37TC, 40PC, 40TC, 41GC References Reilly, B. T., Stoner, J. S., and Wiest, J. (2017). SedCT: MATLAB™ tools for standardized and quantitative processing of sediment core computed tomography (CT) data collected using a medical CT scanner. Geochemistry, Geophysics, Geosystems, 18(8), 3231–3240. https://doi.org/10.1002/2017GC006884 Reilly, B. T., Stoner, J. S., Mix, A. C., Walczak, M. H., Jennings, A., Jakobsson, M., et al. (2019). Holocene break-up and reestablishment of the Petermann Ice Tongue, Northwest Greenland. Quaternary Science Reviews, 218, 322–342. https://doi.org/10.1016/j.quascirev.2019.06.023