cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a2c824g3g
title: Gaseous elemental mercury concentrations measured in the University of Colorado container during the 2019-2020 MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition

description: This dataset contains gaseous elemental mercury (Hg(0)) concentrations measured in the Central Arctic during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. The backbone of MOSAiC was the year-round operation of the Research Vessel Polarstern that drifted with the sea ice across the Central Arctic from October 2019 to September 2020. Measurements were performed onboard Polarstern in the University of Colorado sea-laboratory container installed below deck in the forward cargo hold. A ~50 meter (m) long Teflon sampling line was deployed from the container to the bow crane to allow measurements forward of the vessel. This dataset is an archive of 30-minute averaged Hg(0) concentrations.
DOI: 10.18739/a2cr5nd85
title: Tundra taxa annual abundances under experimental herbivore exclosure and warming near Kangerlussuaq, Greenland, 2003-2017

description: This dataset comprises annual abundances of tundra taxa (plants, lichens, and fungi) collected using non-destructive point-frame sampling at a study site near Kangerlussuaq, Greenland. The data derive from a long-term experiment that included exclusion of large herbivores and passive warming using open-top chambers in compliance with protocols of the International Tundra Experiment. The study was motivated by an interest in determining singular and interactive effects of herbivory and warming on abundances of arctic tundra taxa, tundra community compositional dynamics, and tundra diversity. The experiment was initiated in 2003, and the first stage of it was completed in 2017, after which herbivore exclosures were removed. The investigators reserve the right to update the dataset in the event that transcription errors or errors of omission are discovered after its publication.
DOI: 10.18739/a2d21rk72
title: Relative Abundances of Core and Intact Branched Glycerol Dialkyl Glycerol Tetraethers (brGDGTs) in Eastern Canadian Arctic Lake Catchments 2016-2018

description: The purpose of this dataset is to characterize the core and intact branched glyerol dialkyl glycerol tetraethers (brGDGTs) lipid distributions in Arctic lakes and their catchments. The dataset contains the abundances of core and intact brGDGTs from five lake catchments in the Eastern Canadian Arctic and identifying information (sample name, latitude, longitude, elevation, sampling date, sample type, sample subtype, lake name, and lipid extraction method). Sample types include soil, surface sediment, water filtrate, sediment trap, and sediment core. Along with the commonly measured core brGDGTs, intact brGDGTs with monoglycosyl (1G) and phosphohexose (PH) head groups are reported. Samples were collected between 2016 and 2018.
DOI: 10.18739/a2d795c35
title: Water Stage and Discharge of a Supraglacial Stream in Southwest Greenland (67.15N, 50.00W) Each Minute from July 13, 2019 to August 10, 2019

description: A small supraglacial stream in Southwest Greenland was observed for a 29-day period during the melt season of 2019. A Solinst Levellogger pressure transducer continuously measured stage height every minute throughout the observation period. The logger was placed in a RACO-2 metal project box filled with rocks with conduit holes knocked out to allow water to easily flow through. The box was anchored to a PVC pole drilled into the thalweg of the stream channel. Stage heights were corrected for atmospheric presssure using a Solinst Barologger located 2 m above the ice surface of the adjacent shore. Water heights were also collected with a meter stick at the location of the logger periodically throughout the field season in order to correct for measurement drift and systematic instrumentation error. The measurements showed that water level varied between 0.02 and 0.36 meter (m) fluctuating diurnally. Daily averaged water level peaked on August 1st. Additionally to the water stage heights, stream discharge was recorded with a Sontek FlowTracker2 Handheld Acoustic Doppler Velocimeter on 33 occasions throughout the observation period. Measurements were used to create a rating curve relating stage to discharge in an exponential relationship. The relationship was used to extrapolate stream discharge every minute for the 29-day period. This dataset contains the following files: 1. 660_Stage_Data_Downstream_Manual_Corrected; Time series of barometric pressure, water pressure, water level, and interpolated discharge for the study period. 2. Velocity_Data_2019_published; Summary data of velocity and stream geometry measurements collected with the Acoustic Doppler Velocimeter 3. Depth_Velocity_SiteX_Profile_MMDDYYYY; Detailed stream velocity and geometry measurements for each of the 57 site where X is the site number This data is further described in Leidman et al., 2023.
DOI: 10.18739/a2db7vr1p
title: Surface Mass Balance and Snow Depth on Sea Ice Working Group (SUMup) 10 meter borehole temperature subdataset, Greenland and Antarctica, 1957-2017

description: This dataset currently contains 761 ten meter borehole temperatures across Greenland and Antarctica. These measurements were taken either from individual boreholes or during traverses. This dataset is a compilation of work from many individual researchers. When using this dataset please cite both the individual researchers who provided the data as listed in the Citation field as well as this dataset. Much of this data was originally in THERMAP, a National Snow and Ice Data Center (NSIDC) funded project of temperature data that is no longer available. The measurement methods include Thermohm and Wheatstone bridges, Leeds and Northrup 4735 guarded Wheatstone bridge and a 9834 null detectors, Leeds and Northrup thermohms, Thermister thermometers, Mercury-iridium thermometers, Glass-bead thermistor and a Direct Current (D.C.) Wheatstone's Bridges, and RST ThermArrays. The majority of the measurements (greater than 99%) are from Antarctica with few from Greenland, though this will be updated on an annual basis to include more measurements from both the Arctic and Antarctic. Fields of the data include Date Taken, Latitude, Longitude, Depth Taken, Borehole Temperature, Error, Delta Time, Length of Measurement, elevation, method, name, and citation.
DOI: 10.18739/a2db7vr5m
title: Shipboard hydrographic measurements from the Fate of freshwater and heat from the West Greenland Current project (2021)

description: The motivation for this study is that increased amounts of freshwater, stemming from the Arctic Ocean and from Greenland meltwater, are entering Baffin Bay via the West Greenland Current with the potential to alter circulation patterns and water mass transformation. In addition, an increased amount of heat is being transported northward by the West Greenland Current, with the potential to accelerate the melting of west Greenland’s glaciers. To address this, a hydrographic/velocity survey was carried out covering the boundary current systems on both sides of the bay as well as the basin interior. The main objectives are to determine the fate of the freshwater carried into Baffin Bay by the West Greenland Current, and to establish the pathways by which heat from the current gets diverted to the glaciers in the Uummannaq region of West Greenland. This data submission contains shipboard hydrographic measurements collected during this cruise from September 13, 2021 to October 14, 2021 (Cruise DOI: 10.7284/909350).
DOI: 10.18739/a2dj58j0s
title: Beryllium-7 concentrations in aerosols, seawater, ice, snow and frost flowers from Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition in the Central Arctic Ocean 2019-2020

description: The Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition was an international initiative in which research vessel (R/V) Polarstern drifted with the sea ice in the Central Arctic Ocean from October 2019 to September 2020. Here, we present data from a study in which Beryllium-7, a naturally occurring radioactive isotope with a half-life of 53 days, is used as a tracer for the atmospheric deposition of trace elements to the ocean / ice surface and their partitioning among the seawater, ice and snow catchments during winter and spring. The data sets include measurements of Be-7 in 1) aerosol particles collected on filters using a high volume sampler on Polastern, 2) seawater from the upper water column (8-60 meters depth) collected using the ship’s seawater intake system and using pumps on the ice floe, and 3) ice cores, snow, and frost flowers collected from sites on the MOSAiC and surrounding ice floes. Be-7 analysis was performed using high purity germanium gamma detectors.
DOI: 10.18739/a2dj58j18
title: Evaluating tooth strontium and barium as indicators of weaning age in Pacific walruses, 1932-2016

description: A dataset of calcium-normalized 88Sr (Strontium) and 137Ba (Barium) concentrations from laser ablation transects across the cementum layer of 107 (female: n = 84, male: n = 23) Pacific walrus (Odobenus rosmarus divergens) teeth. Dataset includes spreadsheets containing elapsed time of laser ablation transect in seconds (ElapsedTime_s; laser transect speed = 5μm/s (micrometers per second)), calcium-normalized strontium concentrations (Sr_ppm_m88; values below limit of detection replaced with 1/2*limit of detection, see methods), and calcium-normalized barium concentrations (Ba_ppm_m137; values below limit of detection replaced with 0.5*limit of detection). Photos (in .tif format) of tooth cementum used to estimate the positions of cementum growth layer groups are included for each animal. For teeth where more than one laser ablation scar is visible in the photo, an arrow is included to indicate the laser ablation scar that corresponds with the included trace element data. Finally, a pdf document containing metadata (Catalog Number/ID (identifier), Sex, Median Age Est. (Estimate), Coll. (Collection) Year, Est. Birth Year), weaning age estimates produced by both a visual and mathematical method (Sr Vis. Est., Sr Math. Est., Ba Vis. Est., Ba Math. Est.), and a descriptive grouping of the patterns of accumulation of Sr and Ba (Sr Pat., Ba Pat.) are included. See methods and accompanying paper in Methods in Ecology and Evolution for more details.
DOI: 10.18739/a2dr2p98d
title: Terrestrial Laser Scans of the Central Observatory of the Multidisciplinary drifting Observatory for the Study of Arctic Climate

description: These data are superseded by the following dataset, which has superior alignment quality: https://doi.org/10.18739/A26688K9D. These data are point clouds of the snow and ice surface (in ascii format) of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Central Observatory. They were collected by Ian Raphael and processed by David Clemens-Sewall. These data are provided as is for "Modelling the small-scale deposition of snow onto structured Arctic sea ice during a MOSAiC storm" by Hames et al. 2021 and "Overview of the MOSAiC expedition - Snow and Sea Ice" by Nicolaus et al. 2021. All other researchers are strongly encouraged to use the forthcoming complete MOSAiC Terrestrial Laser Scan (TLS) data. Which will have uncertainty estimates, improved registration, and will supersede these data. Please contact David.W.Clemens-Sewall.Th@dartmouth.edu with any questions.
DOI: 10.18739/a2dv1cq0v
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/a2ff3m173
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/a2fj29f1h
title: Tanana Chiefs Conference Rural Digital Entrepreneurship Workshop (Complete Instruction Materials), Fairbanks, Alaska, November 15-19, 2021

description: This dataset includes the complete instructor materials for the Rural Digital Entrepreneurship Workshop delivered to Tanana Chiefs Conference (TCC) from November 15-19, 2021. The data set includes PDF files that will allow interested researchers and practitioners, including staff at TCC, to deliver an identical or similar workshop on rural digital entrepreneurship in the future. The workshop included three days of instruction (for which the files are provided), and two days of individualized work with participants as they work on pitching a digital business idea. The materials included here are anonymized, make no reference to participants and can also be imported into learning management systems. The workshop intent was to guide participants towards the development and completion of a business plan for a digital enterprise situated in rural Alaska. Editable versions of the files can be requested from the authors.
DOI: 10.18739/a2g44hr9t
title: Bioeconomic Analysis for Arctic Marine Resource Governance and Policy, 2015-2022

description: Arctic living marine resources face threats of invasive species, climate change and the increased overlap with anthropogenic use. With an integrated system of information of biology, economic incentives and institutional aspects, we have context to understand the dynamic and spatial challenges. Our bioeconomic analyses help decipher strategies to address marine invasive species through transboundary Arctic vigilance and incentives. We answer: (1) What are the bioeconomic features of Arctic marine resources at risk of change over space and time? (2) How do human behavior and policy incentives directly and indirectly impact these marine resources? (3) What are the best governance options for Arctic marine resources? We will develop innovative bioeconomic analyses, apply game theoretic tools and investigate policies to combat the marine invasive species vectors and threats to Arctic marine living resources.
DOI: 10.18739/a2g73753n
title: Moored current velocity profiles from Sarqardleq Fjord, West Greenland, over July 2012 to April 2013

description: Sarqardleq Fjord is part of a tidewater glacier-fjord system in western Greenland. These velocity observations were collected as part of a field program to study the dynamics of the ice/ocean boundary layer of a medium-sized glacier. The glacier's margins are characterized by turbulent plumes fed by subglacial discharge, as well as broader, quiescent regions characterized by submarine melt. Ocean property and velocity data were collected to characterize the spatial and temporal variability of the near-ice dynamics. The current velocity profiles were collected by an 300 kilohertz (kHz) RDI Acoustic Doppler Current Profiler (ADCP) deployed on a mooring at ~120 meter (m) depth. The velocity bins extend from 106m to 2m and have a width of 4m. The mooring was deployed from July 18, 2012 to April 15, 2013. It was located ~1.6 kilometers (km) from the glacier terminus.
DOI: 10.18739/a2gf0mx7x
title: Minute-averaged methane dry air mole fractions measured in the University of Colorado container during the 2019-2020 MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) expedition

description: This dataset contains ambient air minute-averaged methane dry air mole fractions measured in the Central Arctic during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. The backbone of MOSAiC was the year-round operation of the Research Vessel Polarstern that drifted with the sea ice across the Central Arctic from October 2019 to September 2020. Measurements were performed onboard Polarstern in the University of Colorado sea-laboratory container installed below deck in the forward cargo hold. A ~50 meter (m) long Teflon sampling line was deployed from the container to the bow crane to allow measurements forward of the vessel.
DOI: 10.18739/a2gh9bb2p
title: Disturbance ecology and the problem of n=1: A proposed framework for unifying disturbance ecology studies to address theory across multiple ecological systems, 2001.

description: 1. Disturbances are a key part of ecosystem dynamics at multiple scales. They can maintain ephemeral habitat, alter local and landscape biodiversity, drive carbon balance changes, and trigger whole ecosystem regime shifts. Yet there are few theories and only limited frameworks underlying disturbance ecology by which scientists and practitioners can anticipate the impacts of novel disturbances or changes in disturbance regimes. Much of the challenge in developing and testing theories lies in the diversity of ecosystems and disturbance processes and the general inability to 1) properly replicate studies and 2) compare results across disparate systems, from bacterial communities to boreal forests. 2. General syntheses of disturbance processes have identified key aspects of disturbance impact and response – resource stock change, resource flux change, spatial dynamics, and trait diversity – that should apply across systems. Yet application and testing remain challenging due to a lack of a common set of metrics and baselines for comparisons across systems. 3. Here, I propose a discipline-wide effort to develop and publish standardized metrics (in addition to study-specific data) such that the field as a whole can build and test general theory that works across ecological systems. Ten metrics spanning event type, location/design data, and biotic composition comprise this suite of “minimum descriptors” and are directly derived from current disturbance ecology theory. Several examples of cross-system applicability, from bacterial studies to paleoecological disturbances, are noted. These are example metrics, intended to open the conversation about the most appropriate and theory-based lines of commonality across the field, and they may be further refined through cross-disciplinary conversation. 4. The result of standardizing metrics will be a coordinated dataset that allows for inter-system testing of theory, meaning disturbance ecology studies can move past disparate, seemingly-unique systems with little replication to integrated research. To phrase it in another way, disturbance ecology studies should be planned, in part, to contribute to future quantitative meta-analyses. If done, we (as a community) will be much better prepared to address the challenges of emerging disturbances, novel ecosystems, and no-analog changes in disturbance regimes which are anticipated with climate change and increasing human pressures.
DOI: 10.18739/a2gm81q31
title: Late Glacial retreat of the Lancaster Sound Ice Sheet and early Holocene Parry Channel throughflow; 2008029-59CC (Composite Core), 2008029-49CC, 2013029-64PC (Piston Core) datasets (2008)

description: Multiple proxies in three sediment cores from Northwestern Baffin Bay document the timing of Lancaster Sound Ice Stream (LSIS) retreat that led to Arctic-Atlantic throughflow in Parry Channel, an important source of freshwater that can impact the Atlantic Meridional Overturning Circulation (AMOC). The Late Glacial to Holocene timing of ice retreat and channel opening and the responses of the regional ocean environment to these events are presented. We use quantitative mineral composition, foraminiferal assemblages, biogenic silica, ice-rafted debris (IRD), and 14C (carbon-14)-based age models to document and date the events and environmental changes occurring during deglaciation of this major marine channel. Findings show that retreat of the LSIS into Lancaster Sound occurred before ~15.3 cal ka BP (calculated kilo annum before present), about 800 years before the onset of major ice berg calving events from the LSIS, named the Baffin Bay Detrital carbonates events (BBDC 1 and BBDC 0). The end of BBDC 0 occurred at ~10.6 cal ka BP, which coincides with the opening of Parry Channel. A marine environment productive of calcareous benthic and planktic foraminifera, with diminished meltwater, seasonal sea ice, warmer summer temperatures and inflowing, nutrient-rich Arctic Surface Water characterizes the interval between the opening of Parry Channel and the opening of Nares Strait. Paired planktic and benthic 14C ages over this 2200-year interval show diminishing age offsets suggesting progressive mixing of the upper ~900 m (meters) of the water column. The opening of Nares Strait by ~8.2 cal ka BP coincides with increased biogenic silica in the form of abundant, large centric diatoms and dissolution of CaCO3 (calcium carbonate). The paucity of calcareous organisms after 8.2 cal ka BP resulted in poor chronological control in the cores to interpret changing environments after 8.2 cal ka BP.