cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a2t43j37g
title: Toward Developing an Arctic Observing Network: An Array of Surface Buoys to Sample Turbulent Ocean Heat and Salt Fluxes During the IPY

description: This project will deploy ocean flux buoys in the Arctic ocean as part of a group effort to contribute to the goals of the IPY and the Study of Environmental Arctic Change (SEARCH) project by: (1) implementing automated monitoring of oceanic fluxes that, along with their atmospheric counterparts, determine the thermodynamic balance of sea ice at a time of significant change in ice volume and extent. It is this balance, considered throughout the basin, that will determine if the Arctic transitions to a state of greatly reduced or no perennial ice cover, (2) contributing to a database of repeated drift trajectories and upper ocean current structure from the Eurasian Basin across the marginal ice zone, (3) working to improve formulations of ocean surface fluxes for use in large scale models, (4) investigating the effects on ocean surface heat flux of variability in heat transport through Fram and Bering Straits, (5) contributing data that will be used to design optimal observing networks. The overall objective of this portion of the project is to measure and understand the role of the upper ocean in the thermodynamic balance of sea ice within the context of the environmental changes underway in the Arctic.
DOI: 10.5281/zenodo.14096540
title: Audio-Polygraphy Dataset for Sleep Apnea Analysis  (APSAA)

description: The Audio-Polygraphy Dataset for Sleep Apnea Analysis (APSAA) provides synchronized, full-night audio and polygraph recordings from 32 subjects, along with manual annotations for labeled events in the polygraph studies.  All subjects were provided with detailed information about the study, and written informed consent was obtained from those who agreed to take part. The recordings were collected between September 2021 and April 2022 at the Sleep Unit of Dr. Sagaz Hospital in Jaén (Spain). The study was approved by the Provincial Research Ethics Committee of Jaén (Spain).

Each subject's data is organized in a designated folder named according to the subject's unique identification code. Inside each folder, users will find: (1) the audio recording in WAV format, (2) separate CSV files for each polygraph signal, and (3) a CSV file containing manual annotations of polygraph events. The polygraph signals included are as follows:



Abdomen_EG: Abdominal respiratory effort.

Flow_EG: Nasal airflow from the nasal cannula.

Pulse_EG: Pulse rate, measured in beats per minute.

Snore_EG: Respiratory snore pressure envelope from the nasal cannula.

SpO2_EG: Peripheral oxygen saturation percentage.

Thermistor_EG: Oronasal thermal airflow.

Thorax_EG: Thoracic respiratory effort.


Additionally, an automated algorithm for synchronizing audio and polygraph signals in sleep studies is provided, accessible via the following Github repository

Funding: This work was supported in part under grant 1257914 funded by Programa Operativo FEDER Andalucia 2014–2020, grant P18-RT-1994 funded by the Ministry of Economy, Knowledge and University (Junta de Andalucía, Spain), by MCIN/AEI/10.13039/501100011033 under the project grants PID2020-119082RB-{C21,C22} and by the Ministerio de Ciencia, Innovación y Universidades (Gobierno de España) under the grants PID2023-146520OB-{C21,C22}.
DOI: 10.5281/zenodo.14096541
title: Audio-Polygraphy Dataset for Sleep Apnea Analysis  (APSAA)

description: The Audio-Polygraphy Dataset for Sleep Apnea Analysis (APSAA) provides synchronized, full-night audio and polygraph recordings from 32 subjects, along with manual annotations for labeled events in the polygraph studies.  All subjects were provided with detailed information about the study, and written informed consent was obtained from those who agreed to take part. The recordings were collected between September 2021 and April 2022 at the Sleep Unit of Dr. Sagaz Hospital in Jaén (Spain). The study was approved by the Provincial Research Ethics Committee of Jaén (Spain).

Each subject's data is organized in a designated folder named according to the subject's unique identification code. Inside each folder, users will find: (1) the audio recording in WAV format, (2) separate CSV files for each polygraph signal, and (3) a CSV file containing manual annotations of polygraph events. The polygraph signals included are as follows:



Abdomen_EG: Abdominal respiratory effort.

Flow_EG: Nasal airflow from the nasal cannula.

Pulse_EG: Pulse rate, measured in beats per minute.

Snore_EG: Respiratory snore pressure envelope from the nasal cannula.

SpO2_EG: Peripheral oxygen saturation percentage.

Thermistor_EG: Oronasal thermal airflow.

Thorax_EG: Thoracic respiratory effort.


Additionally, an automated algorithm for synchronizing audio and polygraph signals in sleep studies is provided, accessible via the following Github repository

Funding: This work was supported in part under grant 1257914 funded by Programa Operativo FEDER Andalucia 2014–2020, grant P18-RT-1994 funded by the Ministry of Economy, Knowledge and University (Junta de Andalucía, Spain), by MCIN/AEI/10.13039/501100011033 under the project grants PID2020-119082RB-{C21,C22} and by the Ministerio de Ciencia, Innovación y Universidades (Gobierno de España) under the grants PID2023-146520OB-{C21,C22}.
DOI: 10.71687/00046550
title: KMD Institution (1992-2007)

description: Institutionssystemet har til formål at understøtte administrationen af børn som benytter daginstitution, skolefritidsordning, klub og lignende.

Indeholder:
Indeholder modulerne: Grunddel, venteliste, visitation og beregning.
DOI: 10.18739/a2pc2t93b
title: Collaborative Research: Subglacial Controls on Greenland Ice Sheet Marginal Acceleration

description: Funds are provided to examine the nature and cause of short-term ice sheet velocity changes. The work field would occur near Swiss Camp, Greenland and focus on the interactions between the ice sheet, the atmosphere and the bed through an integrated observational approach which involves borehole geo- physics, surface-based GPS and modeling. The PIs propose to: (1) measure changes in the subglacial water system over the summer season using borehole water pressure transducers; (2) measure the ice sheet response to changes in basal conditions with surface-based GPS and measured rates of borehole deformation; (3) measure englacial and basal temperatures for input into flow models and to constrain estimates of ice deformation and; (4) correlate these data to melt and surface water volume proxies based on remote sensing data and meteorological data available from GC-Net and measured lake volume. The PIs intend to collaborate with Drs. Martin Funk and Martin Luthi, who have submitted a proposal to the Swiss Nation Science Foundation. Location: Greenland Ice sheet margin: Station FOXX o Latitude: 69.44621 o Longitude: -49.88188 o Elevation: 667 MASL Station HARE o Latitude: 69.49313 o Longitude: -40.54708 o Elevation: 993 MASL
DOI: 10.5281/zenodo.14202712
title: Videos of the processed microscope images and time series of the petrophysical parameters from image processing and geochemical simulation and of the measured induced polarisation [Video][Dataset]

description: Supporting Information for the manuscript Microfluidics and spectral induced polarization for direct observation and petrophysical modeling of calcite dissolution published in Geophysical Research Letters



Data Set S1. Porosity, water saturation, and calcite sample perimeter from imageprocessing.

Data Set S2. Porosity, water conductivity, and pH from geochemical simulation.

Data Set S3. Real and imaginary components of the complex electrical conductivity at2.5 Hz and CEC from petrophysical modeling.

Movie S1. Dissolution of the calcite sample with the detected contour superimposed inwhite on the grayscale images. Time, length scale, and flow direction are indicated. Incase of problems launching the file, we recommend using VLC Media Player software.

Movie S2. Segmented images of the CO2 bubbles produced by the calcite dissolution.Time, length scale, and flow direction are indicated. In case of problems launching thefile, we recommend using VLC Media Player software.
DOI: 10.18739/a2jm23g9z
title: IASOA - Eureka Observatory

description: Eureka, Nunavut, Canada 80.050 N, 86.417 W, Ellesmere Island The Eureka station is composed of three sites: Polar Environment Atmospheric Research Laboratory (PEARL), Zero altitude Pearl Auxiliary Laboratory (0PAL), and Surface and Atmospheric Flux, Irradiance and Radiation Extension (SAFIRE). PEARL is situated on higher terrain in order to sample the atmosphere above the aerosol layer, from ground level to the middle and upper atmosphere, whereas 0PAL is closer to sea level in order to sample within the aerosol layer. SAFIRE is a tower instrumented for radiation and flux measurements. There are numerous instruments at Eureka, including, but not limited to, a radar and lidar for cloud studies, imagers, interferometers, photometers, radiation sensors, an ozone lidar, and standard weather measurements. Eureka is a testament to interagency and international cooperation among scientists. The principal agency in charge of Eureka is the CAnadian Network for the Detection of Atmospheric Change (CANDAC), which is a consortium of scientists from various Canadian universities. Detailed information about the station, associated agencies, instruments and principal investigators can be found at the CANDAC web site candac.ca/candac/index.php and at www.iasoa.org. Questions regarding station operations should be directed to Pierre Fogal (Pierre.Fogal@utoronto.ca). Dr. James Drummond is the focal point for the science conducted at Eureka (james.drummond@dal.ca).
DOI: 10.18739/a2dz03272
title: Community-Based Documentation of Ice Seals and Walrus in the Bering Strait Region

description: The ice seal and walrus populations of the Bering Sea, as well as the subsistence users who utilize them, currently face many challenges. These include loss of sea ice and the expansion of development, fisheries activities, and marine shipping in the northern Bering Sea. Concern over the future of these species is growing, but existing science cannot conclusively predict how these factors will affect ice seals and walrus or the communities that depend on them. Local knowledge of the ecology and biogeography of these species, in addition to local use patterns, may help communities and policy makers understand current and future impacts of these environmental and anthropogenic changes. This is a community based research project through Kawerak Inc., the Alaska Native regional non-profit corporation. As part of this project, Kawerak researchers will be working with local community members to implement ethnographic and GIS spatial mapping methods in order to increase our understanding of Bering Strait region Iñupiat, Central Yup'ik, and St. Lawrence Island Yupik relationships with two important subsistence resources, ice seals and walrus whose habitat is being affected by environmental change. Through mapping spatial and temporal knowledge of ice seal and walrus habitat and ecology and subsistence use area, documenting the cultural importance of hunting ice seals and walrus, as well as the challenges to subsistence ice seal and walrus hunting (as seen by hunters), the project will contribute to an increased understanding of the complexity of social-environmental dynamics in the Arctic. The project will give a voice to local analyses and solutions of these problems which will in turn inform wildlife managers and policy makers. In addition, the project will contribute to an Arctic Atlas of Important Ecological Areas (IEAs) being developed by the international conservation group Oceana, which will in turn be a tool for the region's communities.
DOI: 10.18739/a2959c83p
title: Dynamics and Forcing of Nares Strait from 2003 to 2009: Tidal to Interannual Variability to the West of Greenland

description: Funds are provided to test the hypothesis that the dynamics of Nares Strait is in a state of transition as the season of landfast ice cover diminishes in duration. In particular, the PIs will address two testable hypotheses: H1. Freshwater flux through the Canadian Archipelago presently transitions annually from a dynamic state characterized by land-fast ice (the winter regime) to a different one characterized by mobile ice (the summer regime). H2. A regime change towards a longer mobile summer ice regime leads to more variable ice and ocean freshwater flux as the waters of Nares Strait become exposed to time-dependent local atmospheric surface forcing in addition to remote forcing by the ambient Arctic Ocean and Baffin Bay. To do so, they propose to analyze a comprehensive 6-year data set from an array of moored ocean current, salinity, temperature, sea level, and subsurface pressure sensors, as well as ice thickness observations. The data originate from an unprecedented, high-risk, but ultimately successful 2003-2009 Canada-US observational program that took place in Nares Strait, a major pathway of Arctic waters into the North Atlantic to the west of Greenland. They propose to describe and explain the temporally and spatially varying regimes of kinematics and dynamics within this energetic channel. As oceanic fields are forced by vertical and horizontal boundary layer physics at the ice-water, air-water, and ice-air interfaces, the program includes synthesis of data from a meteorological modeling, a remotely-sensed ice (MODIS), and an ice modeling (CICE) component.
DOI: 10.18739/a25d8nf9x
title: Community-Based Documentation of Ice Seals and Walrus in the Bering Strait Region

description: The ice seal and walrus populations of the Bering Sea, as well as the subsistence users who utilize them, currently face many challenges. These include loss of sea ice and the expansion of development, fisheries activities, and marine shipping in the northern Bering Sea. Concern over the future of these species is growing, but existing science cannot conclusively predict how these factors will affect ice seals and walrus or the communities that depend on them. Local knowledge of the ecology and biogeography of these species, in addition to local use patterns, may help communities and policy makers understand current and future impacts of these environmental and anthropogenic changes. This is a community based research project through Kawerak Inc., the Alaska Native regional non-profit corporation. As part of this project, Kawerak researchers will be working with local community members to implement ethnographic and GIS spatial mapping methods in order to increase our understanding of Bering Strait region Iñupiat, Central Yup'ik, and St. Lawrence Island Yupik relationships with two important subsistence resources, ice seals and walrus whose habitat is being affected by environmental change. Through mapping spatial and temporal knowledge of ice seal and walrus habitat and ecology and subsistence use area, documenting the cultural importance of hunting ice seals and walrus, as well as the challenges to subsistence ice seal and walrus hunting (as seen by hunters), the project will contribute to an increased understanding of the complexity of social-environmental dynamics in the Arctic. The project will give a voice to local analyses and solutions of these problems which will in turn inform wildlife managers and policy makers. In addition, the project will contribute to an Arctic Atlas of Important Ecological Areas (IEAs) being developed by the international conservation group Oceana, which will in turn be a tool for the region's communities.
DOI: 10.18739/a21n7xn5s
title: Fire influences on forest recovery and associated climate feedbacks in Siberian Larch Forests, Russia, June-July 2018

description: The primary objective of this research is to determine the causes of varying post-fire tree recruitment within larch forests of eastern Siberia and consequences for climate feedbacks via changes in Carbon (C) storage and albedo using a combination of field-based measurements, dendrochronological analysis, remotely-sensed data, and statistical modelling. This dataset contains field data from 6 burned areas in eastern Siberia, collected during June and July 2018. Within each burned area, we measured larch seedling recruitment (density and size), overstory, understory, and shrub composition, active layer depth, soil organic layer composition, soil nutrients, and canopy cover in a series of "extensive plots" along transects. In "intensive plots" with varying larch seedling density, we collected detailed information on larch recruitment age, size, and density, mycorrhizal abundance and composition on larch seedling roots, soil organic layer characteristics, understory vegetation, ectomycorrhizal host presence, canopy cover, and soil nutrients, moisture, and temperature.
DOI: 10.18739/a2ww77106
title: Publications and presentations, Dynamics and Consequences of Increasing Ice-wedge Degradation

description: This dataset contains publications and presentations related to the project
DOI: 10.18739/a2s46h66r
title: Collaborative Research: Greenland Meltwater Geomicrobiology

description: The Greenland Ice Sheet (GrIS) is the largest freshwater reservoir in the Arctic. Melting of the GrIS is increasing, delivering large amounts of freshwater to the Arctic Ocean. The nature and composition of microbial communities below the GrIS are not known, but recent studies have documented the presence of viable microbial communities in other subglacial environments and within the GrIS ice itself, indicating their potential importance for chemical weathering processes. This project will characterize GrIS subglacial microbial communities to investigate the effect of microbes on lithospheric weathering and nutrient fluxes from the GrIS margin in West Greenland. The hypothesis is that the glacial thermal regime and bedrock lithology are the primary determinants of the subglacial bacterial communities, which in turn mediate nutrient release and weathering rates. Study sites in the Thule and Kangerlusuaq areas cover two major lithologies of West Greenland. The study combines state-of-the art microbiological, biogeochemical techniques, and datalogging of stream and climate parameters, to examine glacial meltwater. It is anticipated that the melting of the GrIS will have large effects on global biogeochemical cycles, ocean ecology, and atmospheric CO2. GrIS subglacial microbes are anticipated to play an important role in mobilizing elements from the lithosphere. Data generated on the diversity of GrIS microbes (Bacteria, Archaea and Eukarya) will provide an initial assessment of microbial richness and diversity in aquatic habitats beneath the GrIS. The primary objective is to examine the biodiversity and microbial contribution to geochemical processes and nutrient release, and this study will also provide insight into low temperature adaptation of life in and to a hitherto unexamined subglacial environment. A synergistic relationship with the WISSARD (Whillams Ice Stream Subglacial Access Research Drilling) project will provide the opportunity for a bipolar comparison of biodiversity beneath the Greenland and West Antarctic ice sheets. Providing data of chemical composition and fluxes of meltwater (particularly carbon, iron and trace nutrients) and sediments released by the GrIS will provide a framework to assess potential feedbacks in global biogeochemical models. Detailed measurements over two melting seasons will provide fundamental data towards a conceptual model of GrIS subglacial microbial environments.
DOI: 10.18739/a2hq3s02p
title: Collaborative Research: Shifting seasonality of Arctic river hydrology alters key biotic linkages among aquatic systems

description: This research will determine how the shifting seasonality of arctic river hydrology alters key biotic linkages within and among lake and stream components of watersheds and may alter the function of the arctic system. Arctic grayling (Thymallus arcticus) is a quintessential, circumpolar arctic species that provides a model system for understanding the impacts of changing seasonality on arctic ecosystem function because an interconnected and varied landscape (large tundra rivers, small streams and lakes) is required to maintain their population viability. Changes to environmental conditions that disrupt their migration will affect the system-level function of aquatic ecosystems. Grayling serve as food for other biota, including lake trout, birds and humans, and as top-down controls in stream ecosystems suggesting that changes to their populations will have effects that reverberate throughout the coupled river-lake system. The scale and pace of the changes now impacting tundra lakes and streams imparts an urgency to understand how they are linked and how they function as a system. This work will address 4 questions: 1) How are seasonality, rate and distance of grayling migration affected by climate change? 2) Are the seasonality of life-cycles, life-history and attributes of stream insect populations changing in response to climate change? 3) How does changing seasonality of river discharge interact with insect production to affect availability and transfer of stream production to grayling? 4) What is the effect of climate driven disruption of the migratory link on the structure and function of winter refugia?
DOI: 10.18739/a24f1mk0b
title: Past, Present and Future States and Variations of the late Quarternary Permafrost Subsystem

description: Permafrost and seasonally frozen ground comprise a critically important component of the dynamic arctic terrestrial system, constituting a closely tied subsystem interacting with snow cover, vegetation, and the overlying atmosphere. This permafrost subsystem regulates the local exchange of energy, water, and materials (including carbon and nitrogen), and its influence extends beyond the arctic land to the hydrosphere and the extra-tropical climate. Furthermore, the long timescale of permafrost dynamics requires evaluation of the evolution and impacts of the subsystem on the glacial-interglacial time frame. While some recent numerical projections show rapid and widespread degradation of permafrost in response to climate change during this century, global climate system models with physically based snow and permafrost dynamics have not been fully tested, using new observationally-based evidence, for spatial and temporal variability of the subsystem under different climate conditions such as the Holocene optimum or the Last Glacial Maximum (LGM). Evaluation of the climate sensitivity to the permafrost will provide vital insight to future scenarios, especially in the Northern Hemisphere. The focus will be on three late Quaternary eras for which numerical simulations are widely performed by the collaborative efforts of the Paleoclimate Model Intercomparison Project (PMIP: i.e., the preindustrial present (0 ka, where ka = thousand years before present), mid-Holocene (6 ka), and the LGM (21ka). This project will focus on evaluating the structure and function of the permafrost subsystem under different climate conditions.