cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a22r3nz2w
title: Polaris Project 2018-2019: Weather station data, Yukon-Kuskokwim Delta, Alaska

description: This project is integrating scientific research in the Arctic with education and outreach, with a strong central focus on engaging undergraduate students and visiting faculty from groups that have had little involvement in Arctic science to date. The central element of the project is a month-long research expedition to the Yukon River Delta in Alaska. The expedition provides a deep intellectual and cultural immersion in the context of an authentic research experience that is paramount for "hooking" students and keeping them moving along the pipeline to careers as Arctic scientists. The overarching scientific issue that drives the research is the vulnerability and fate of ancient carbon stored in Arctic permafrost (permanently frozen ground). Widespread permafrost thaw is expected to occur this century, but large uncertainties remain in estimating the timing, magnitude, and form of carbon that will be released when thawed. Project participants are working in collaborative research groups to make fundamental scientific discoveries related to the vulnerability of permafrost carbon in the Yukon River Delta and the potential implications of permafrost thaw in this region for the global climate system. This data set contains pressure, Photosynthetically Active Radiation (PAR), air temperature, wind direction, wind speed, wind gust speed, rain, relative humidity, soil moisture at 15 centimeter (cm) depth, and two measurements of soil temperature at 15 cm depth from the 2018 and 2019 expeditions.
DOI: 10.18739/a2z02z964
title: Anonymized Group Interview Transcript, Akiak, Alaska, August 2019

description: This dataset derives from follow-up research (following twelve months of ethnographic fieldwork) conducted over three weeks in August 2019. Dataset includes one file: an anonymized transcript of a group interview conducted with a small group of Yupiaq (Yup'ik) Elders, adults, and youth, in Akiak, Alaska, in August 2019. Interview focuses on the importance of salmon fishing relations to kinship and other social relations as well as the adverse social and psychological affects of state and federal fishing regulations on life in Akiak. Audio recording is not included in dataset due to concerns about anonymity.
DOI: 10.18739/a2t727h3v
title: HELiX Uncrewed Aircraft System data from the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) campaign, multispectral imagery data

description: Data are available for download at: https://arcticdata.io/data/10.18739/A2RV0D21Z/ This dataset consists of multispectral imagery data products produced from HELiX uncrewed aircraft system (UAS) flights that were conducted over or near sea ice during the MOSAiC expedition. These data were produced from raw multispectral imagery acquired by the Helix’s gimbal-mounted RedEdge-MX camera. Additional data from the Helix UAS’ other sensors, which consist of hemispheric irradiance measurements from two Kipp and Zonen pyranometers and thermodynamic parameters from two Vaisala RSS421 sensors can be found in Radiance Calmer, Gijs de Boer, Jonathan Hamilton, Dale Lawrence, Steve Borenstein, et al. 2021. HELiX Uncrewed Aircraft System data from the Multidisciplinary drifting Observatory for the Study of Arctic Climate campaign, A1 level data. Arctic Data Center. doi:10.18739/A2M90243X (A1 data) or Radiance Calmer, Gijs de Boer, Jonathan Hamilton, Dale Lawrence, Steve Borenstein, et al. 2021. HELiX Uncrewed Aircraft System data from the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) Campaign. Arctic Data Center. doi:10.18739/A2GH9BB0Q (B1 data). Three main flight types were conducted with the Helix: a grid pattern, hover, and profile. Pix4D was used to produce five (one for each channel of the camera) orthomosaics, reflectance maps, and colorized index maps for all flight types. A video of the images taken during the flight, including an image scale, UTC time, and altitude overlay was produced for each profile flight. More information on the data and methods 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 (2021): Observing the Central Arctic Atmosphere and Surface with University of Colorado Uncrewed Aircraft Systems, Nature Scientific Data, in prep.
DOI: 10.18739/a2js9h89m
title: Polaris Project 2019: Vegetation biomass, point intercept, and thaw depth, Yukon-Kuskokwim Delta, Alaska

description: This project is integrating scientific research in the Arctic with education and outreach, with a strong central focus on engaging undergraduate students and visiting faculty from groups that have had little involvement in Arctic science to date. The central element of the project is a month-long research expedition to the Yukon River Delta in Alaska. The expedition provides a deep intellectual and cultural immersion in the context of an authentic research experience that is paramount for "hooking" students and keeping them moving along the pipeline to careers as Arctic scientists. The overarching scientific issue that drives the research is the vulnerability and fate of ancient carbon stored in Arctic permafrost (permanently frozen ground). Widespread permafrost thaw is expected to occur this century, but large uncertainties remain in estimating the timing, magnitude, and form of carbon that will be released when thawed. Project participants are working in collaborative research groups to make fundamental scientific discoveries related to the vulnerability of permafrost carbon in the Yukon River Delta and the potential implications of permafrost thaw in this region for the global climate system. This data set includes vegetation biomass and elemental analysis, thaw depth, and point intercept results from the 2019 expedition.
DOI: 10.18739/a2f18sg68
title: Polaris Project 2018: Vegetation biomass, plot characterization, point intercept, and thaw depth, Yukon-Kuskokwim Delta, Alaska.

description: This project is integrating scientific research in the Arctic with education and outreach, with a strong central focus on engaging undergraduate students and visiting faculty from groups that have had little involvement in Arctic science to date. The central element of the project is a month-long research expedition to the Yukon River Delta in Alaska. The expedition provides a deep intellectual and cultural immersion in the context of an authentic research experience that is paramount for "hooking" students and keeping them moving along the pipeline to careers as Arctic scientists. The overarching scientific issue that drives the research is the vulnerability and fate of ancient carbon stored in Arctic permafrost (permanently frozen ground). Widespread permafrost thaw is expected to occur this century, but large uncertainties remain in estimating the timing, magnitude, and form of carbon that will be released when thawed. Project participants are working in collaborative research groups to make fundamental scientific discoveries related to the vulnerability of permafrost carbon in the Yukon River Delta and the potential implications of permafrost thaw in this region for the global climate system. This data set includes vegetation biomass and elemental analysis, thaw depth, and point intercept results from the 2018 expedition.
DOI: 10.18739/a29882p2h
title: Methane production in laboratory incubations of Arctic soil at three temperatures, 2018

description: When wet Arctic tundra soils begin to freeze in the fall, an unfrozen layer remains between the frozen surface and deeper permafrost layers. This period is known as the zero curtain, as liquid water keeps the temperature of this soil layer near 0 Celsius (C) while latent heat is gradually dissipated. This experiment compares the temperature response of the methanogenic community in the zero curtain period with that of the summer community to test whether the zero curtain methanogenic community is especially cold adapted. This dataset includes methane production rates measured in anaerobic laboratory incubations of soils collected from two dates (July and Nov 2018) at temperatures around 0, 4 and 10C.
DOI: 10.18739/a25h7bv78
title: Carbon-13 (13C) methane from an isotopic labelling experiment in Arctic tundra, Utqiagvik, Alaska, 2019.

description: An isotopic labeling experiment was conducted in an Arctic coastal wet tundra ecosystem to determine how quickly acetate is transformed into methane and transported from the soil to the atmosphere. Carbon-13 (13C) labelled acetate was injected into soil chambers installed across a 131 meter (m) transect. Gas samples were periodically collected from the headspace in chambers, and analyzed for methane concentration and enrichment in 13C. Methane flux was roughly estimated from the final concentration in the chambers accumulated over a one-hour sampling period. This dataset includes methane fluxes, concentrations and 13C enrichment values from this experiment. In addition, water samples were collected from 15 centimeters (cm) depth after the final time point for measurements of residual dissolved 13C-methane in the soil after 9 days.
DOI: 10.18739/a21r6n222
title: Dissolved methane concentrations in Arctic tundra soil profiles in Utqiagvik, Alaska during Fall 2019 and Spring 2021

description: When wet Arctic tundra soils begin to freeze in the fall, an unfrozen layer remains between the frozen surface and deeper permafrost layers. This period is known as the zero curtain, as liquid water keeps the temperature of this soil layer near 0 Celsius (C) while latent heat is gradually dissipated. Significant methane emissions have been observed during this period but the role of concurrent biological production vs escape of stored methane requires more study. This dataset includes dissolved methane concentrations from the active layer (upper 35 centimeters (cm)) of Arctic tundra soils during the fall zero curtain period and in the spring, at the beginning of the thaw period. These data help address the question of biological methane production and storage during the fall.
DOI: 10.18739/a2x05xd8v
title: Methyl-coenzyme M reductase alpha subunit (mcrA) transcripts from Arctic tundra soil near Utqiagvik, Alaska, 2018

description: When wet Arctic tundra soils begin to freeze in the fall, an unfrozen layer remains between the frozen surface and deeper permafrost layers. This period is known as the zero curtain, as liquid water keeps the temperature of this soil layer near 0 Celsius (C) while latent heat is gradually dissipated. This project investigates the methanogenic Archaea that are metabolically active in the unfrozen layer during the fall zero curtain period and compares this community to that which is active in the late summer at the same depth (10-20 centimeters (cm)). This dataset contains the abundance of distinct partial mcrA (Methyl-coenzyme M reductase alpha subunit) gene sequences (operational taxonomic units, OTU's defined at 16% similarity) amplified from messenger ribonucleic acid (mRNA) extracted from soil samples in this study. These data complement the sequences deposited in GenBank (accession numbers OL505703-OL505708).
DOI: 10.18739/a2sb3x06z
title: Coastal Ocean Dynamics in the Arctic (CODA): oceanographic moorings from 2019-2020 along the northern coast of Alaska

description: This dataset contains mooring observations of ocean waves, currents, and temperatures, as well as sea ice thickness, at three coastal sites along the northern coast of Alaska, with multiple cross-shore positions at each site. The data documents the annual cycle of the coastal environment, with wave activity and warm temperatures in the summer and fall, then ice cover and cold temperatures in the winter and spring. The cross-shore variations include the effects of land-fast ice (at positions close to the coast). The data were collected as part of the Coastal Ocean Dynamics in the Arctic (CODA) project, and the motivation of the project was to understand the oceanographic drivers of coastal erosion in the Arctic. Our methods emphasized in situ measurements of ocean surface waves, sea ice thickness, and water temperatures. We used seafloor platforms (moorings) to collect these data, with uplooking Acoustic Doppler Current Profilers and Altimeters as well as seafloor temperature and pressure.
DOI: 10.18739/a2nk3663p
title: Metabolically active prokaryotes in tundra soil near Utqiagvik, Alaska in summer and fall, 2018

description: When wet Arctic tundra soils begin to freeze in the fall, an unfrozen layer remains between the frozen surface and deeper permafrost layers. This period is known as the zero curtain, as liquid water keeps the temperature of this soil layer near 0 Celsius (C) while latent heat is gradually dissipated. This project investigates the microbes that are metabolically active in the unfrozen layer during the fall zero curtain period and compares this community to that which is active in the late summer at the same depth (10-20 centimeters (cm)). This dataset contains the abundance and taxonomic designation of distinct 16S ribosomal ribonucleic acid (16S rRNA) sequences (operational taxonomic units, OTU's) associated with samples in this study. These data complement the sequences and metadata deposited in GenBank Bioproject PRJNA780202.
DOI: 10.18739/a2ht2gd01
title: Snow thickness measurements on young ice in the Central Arctic during the 2019-2020 Multidisciplinary Drifting Observatory for the Study of Arctic Climate expedition

description: Snow is important for sea ice thermodynamics due to its role as an insulator and its high albedo. This dataset comprises direct observations of snow accumulation on young ice (ice that has recently frozen from sea water) in the Central Arctic. They were collected for the purpose of quantifying snow redistribution on Arctic sea ice. Researchers in the field noted the dates on which five different open water leads froze over into new ice and subsequently measured the snow thickness at several locations on this young ice manually (with a snow ruler). The edges of leads can cause snow drifts to form. In this dataset, it is noted whether a measurement was made in the snow drift at the edge of the lead or not.
DOI: 10.18739/a2d21rk6k
title: Arc2kmTM: Arctic 2 kilometer Tide Model, 2021

description: The Arctic 2 km (kilometer) Tide Model (Arc2kmTM) is a barotropic ocean tide model on a 2x2 km polar stereographic grid, developed using the Regional Ocean Modeling System (ROMS). Arc2kmTM consists of spatial grids of complex amplitude coefficients for sea surface height and depth-integrated currents (“volume transports”) for 8 principal tidal constituents: 4 semidiurnal (M2, S2, K2, N2) and 4 diurnal (K1, O1, P1, Q1). See the Methods section for a description of model development. The Arc2kmTM gridded files are in binary format (see Arc2kmTM_FileFormat.pdf) and are designed to be used with the open-source software packages: the Matlab “Tide Model Driver” (TMD) toolbox, the Python “pyTMD” package, and the FORTRAN “OSU Tidal Prediction Software” (OTPS). These packages allow the user to browse the model for different constituents, and to make tidal predictions for any time at any location within the model domain. Please also check the Earth and Space Research (ESR) Polar Tide Model webpage (https://www.esr.org/research/polar-tide-models/) and our Arctic Data Center Portal (https://arcticdata.io/catalog/portals/ArcticTides) for other Arctic-region barotropic tide models and more information on software packages.
DOI: 10.18739/a28911s1b
title: Leaf nitrogen and digestibility for Salix pulchra, Betula nana, and Eriophorum vaginatum in short-term (&lt;2 summers) and long-term (~25 summers) warming by open-top chamber in the moist acidic tundra snow fence at Toolik Lake, Alaska, 2018-2019

description: This is a data set contribution from "Nutritional Landscapes of Arctic Caribou: Observations, Experiments, and Models Provide Process-level Understanding of Forage Traits and Trajectories." These data are part pf a long-term snow fence experiment with areas of deep snow and shallow snow relative to ambient snow depth nearby. Within the distinct snow fence zones, open-top chambers (OTCs) were used to warm the ecosystem between roughly early June and late August. The experiment began in 1994 and has been conducted nearly every summer since then. These OTCs represent the long-term warming effects on moist acidic tundra plants and the ecosystem. In addition, for two summers we established an additional set of OTCs to represent short-term warming effects. Here, we focus sampling on species commonly found in caribou diet (Salix pulchra, Betula nana, and Eriophorum vaginatum) and analyzed leaf tissue for nitrogen (N) concentration, components of dry matter digestibility, and protein precipitation capacity (shrubs only) as a measure of digestibility reducing secondary compounds found in plants.
DOI: 10.18739/a24j09z63
title: Total dissolved gas pressure (TDGP) and O2/N2 (Oxygen/Nitrogen) data collected on a research cruise on the vessel Ocean Starr, Bering, Chukchi, and Beaufort Seas, Arctic Ocean, 2019.

description: Data were collected between August 1, 2019 and August 24, 2019 using a commercially available gas tension device (GTD) made by Pro-Oceanus (miniTDGP) connected to the surface uncontaminated seawater supply (which had a nominal intake depth of 3.5 meters) of Ocean Starr on leg 1 of Cruise identifier (ID) OS1901. Data were collected near-continuously over the cruise track which departed from Dutch Harbor, Alaska (AK) and sampled waters of the Bering and Chukchi Sea, ending in Nome, AK. The objective of Arctic IES is to understand how reductions in Arctic sea ice and the associated changes in the physical environment influence the flow of energy through the ecosystems of the Chukchi and Beaufort seas. Two research expeditions in the Beaufort and Chukchi seas during late summer and early fall 2017 and 2019 were designed to address this objective. This survey takes measurements of the: 1) physical environment (temperature, salinity, nutrients); 2) seasonal composition, distribution and production of phytoplankton (plants); 3) distribution and standing stocks of zooplankton (bird, whale, and fish food); 4) assemblages, distributions, abundances, size, diet, and fitness of larval, early juvenile, and adult fishes; and 5) distribution and relative abundances of seabirds and marine mammals. The measurements here contribute to characterizing both the chemical environment and the rate of net biological oxygen production.
DOI: 10.18739/a20r9m539
title: Discrete O2/Ar (Oxygen/Argon) and oxygen isotope data collected on a research cruise on the vessel Ocean Starr, Bering, Chukchi, and Beaufort Seas, Arctic Ocean, 2019.

description: Data were collected on Cruise identifier (ID) OS1901_L1 between August 1, 2019 and August 24, 2019 from either the surface uncontaminated seawater supply of research vessel (R/V) Ocean Starr or from Niskin-style water sample bottles attached to a conductivity-temperature-depth package maintained by the National Oceanic and Atmospheric Administration (NOAA) Pacific Marine Environmental Laboratory. Data were collected periodically over the cruise track which departed from Dutch Harbor, Alaska (AK) and sampled waters of the Bering and Chukchi Sea, ending in Nome, AK. This was a part of the Arctic Integrated Ecosystem Survey (Arctic IES) program. The objective of Arctic IES is to understand how reductions in Arctic sea ice and the associated changes in the physical environment influence the flow of energy through the ecosystems of the Chukchi and Beaufort seas. Two research expeditions in the Beaufort and Chukchi seas during late summer and early fall 2017 and 2019 were designed to address this objective. This survey takes measurements of the: 1) physical environment (temperature, salinity, nutrients); 2) seasonal composition, distribution and production of phytoplankton (plants); 3) distribution and standing stocks of zooplankton (bird, whale, and fish food); 4) assemblages, distributions, abundances, size, diet, and fitness of larval, early juvenile, and adult fishes; and 5) distribution and relative abundances of seabirds and marine mammals. The measurements here contribute to characterizing both the chemical environment and the rate of net biological oxygen production.
DOI: 10.18739/a2rb6w376
title: Underway O2/Ar (Oxygen/Argon) and oxygen data collected on a research cruise on the vessel Ocean Starr, Bering, Chukchi, and Beaufort Seas, Arctic Ocean, 2019.

description: Data were collected between August 1, 2019 and August 24, 2019 using an equilibrated inlet mass spectrometer (EIMS, Cassar et al. 2009) connected to the surface uncontaminated seawater supply (which had a nominal intake depth of 3.5 meters) of Ocean Starr on leg 1 of Cruise identifier (ID) OS1901. Data were collected near-continuously over the cruise track which departed from Dutch Harbor, Alaska (AK) and sampled waters of the Bering and Chukchi Sea, ending in Nome, AK. This was a part of the Arctic Integrated Ecosystem Survey (Arctic IES) program. The objective of Arctic IES is to understand how reductions in Arctic sea ice and the associated changes in the physical environment influence the flow of energy through the ecosystems of the Chukchi and Beaufort seas. Two research expeditions in the Beaufort and Chukchi seas during late summer and early fall 2017 and 2019 were designed to address this objective. This survey takes measurements of the: 1) physical environment (temperature, salinity, nutrients); 2) seasonal composition, distribution and production of phytoplankton (plants); 3) distribution and standing stocks of zooplankton (bird, whale, and fish food); 4) assemblages, distributions, abundances, size, diet, and fitness of larval, early juvenile, and adult fishes; and 5) distribution and relative abundances of seabirds and marine mammals. The measurements here contribute to characterizing both the chemical environment and the rate of net biological oxygen production.
DOI: 10.18739/a2mk6593f
title: Indigenous Peoples of the Arctic boundary polygons, 2021

description: Indigenous Peoples of the Arctic boundary polygons Greg Fiske at Woodwell Climate Research Center (gfiske@woodwellclimate.org) April 2021 Created for Figure 1.1 in Chapter 1: Introduction: Building Common Interests with Informed Decisionmaking for Sustainability (Paul Arthur Berkman, Oran R. Young, Alexander N. Vylegzhanin, David A. Balton and Ole Øvretveit). IN: Berkman, P.A., Young, O.R., Vylegzhanin, A.N., Balton, D.A. and Øvretveit, O. (eds.). 2022. Building Common Interests in the Arctic Ocean with Global Inclusion. Volume 2. Informed Decisionmaking for Sustainability. Original data created by GRID Arendal, shared by Levi Westerveld (levi.westerveld@grida.no). Updates applied by gereferencing the map at this location: https://www.grida.no/resources/13341 based on advice by Westerveld. Additional spatial edits to each shapefile were based on conversation with Anna Degteva (anna.d.ips@arctic-council.org) at the Arctic Council Indigenous Peoples' Secretariat (https://www.arcticpeoples.com/) who personally requested updates from the six Indigenous Peoples’ Organizations. All but Russian Association of Indigenous Peoples Organization of the North (RAIPON) responded with map edit requests that were incorporated into the shape files that are herein submitted for open access. The edit requests came in the format of hand drawn polygons on top of existing jpg images and/or lists of placenames that should (or should not) be included in each boundary file. Lastly, additional resource maps were shared by Lars Kellerud at GRID Aredal. All efforts were made to accommodate comments and resources provided while editing these layers. These shapefiles were updated with support from the United States National Science Foundation (NSF) through the Arctic/Pan-Arctic Options projects (Award Nos. NSF-OPP 1263819, NSF-ICER 1660449, NSF-ICER 2103490).