cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a2fn10s5v
title: Collaborative Research: Linking belowground phenology and ecosystem function in a warming Arctic

description: This project comprises a four-year, passive warming experiment of low-Arctic tundra vegetation at a long-term study site in Greenland, with the primary aim of measuring the response of plant roots to warming, and the role of this response in ecosystem carbon exchange. Phenology, the annual timing and progression of events such as aboveground plant growth, is a well-studied an important component of the ecology of climate change, but remains under-studied belowground. This study will estimate and compare above- and belowground responses of plant phenology to warming and their respective contributions to ecosystem function, specifically the exchange of carbon between the atmosphere and tundra. It will furthermore determine which plant types, e.g., shrubs or grasses, show the greater belowground response to warming and contribution to ecosystem carbon exchange. 

Novel insights into the expected response of the Arctic to climate change will emerge from this experiment, which will also expand the infrastructure for field-based experimental and observational research in the Arctic. This research will promote the involvement of under-represented groups by recruitment of students through Penn State?s Minority Undergraduate Research Experience program, and promote education and dissemination of its results through a summer field ecology module at the study site and in courses at Penn State and the University of Alaska-Anchorage. Results will also be published in peer-reviewed journals and presented at international conferences by participating students and the Principal Investigators.
DOI: 10.15468/dl.jajj2h
title: Occurrence Download

description: A dataset containing 44 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is South America",
 "TaxonKey is Dioscorea humilis Bertero ex Colla"
 ]
}

 The dataset includes 44 records from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027707-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.18739/a2639k56n
title: Discrete soil temperature and volumetric soil water content near Kangerlussuaq, Greenland. 2012-2014

description: Discrete soil temperature and volumetric soil water content (SWC) measurements collected throughout the 2012 - 2014 growing seasons.
DOI: 10.18739/a22b8vc2h
title: Arctic lake transient electromagnetic (TEM) soundings 2016-2017

description: This dataset contains transient electromagnetic (TEM) geophysical soundings acquired on Arctic lakes during spring fieldwork 2016 - 2017. Several additional TEM soundings are included acquired on terrestrial permafrost near lakes (for control) or historic boreholes (for validation). Measurements were made using an ABEM WalkTEM with a 1600m^2 transmitter loop, a 200m^2 receiver loop, and a 5m^2 receiver loop, all in a center-nested configuration. Raw data for 86 soundings are provided in the Universal Sounding Format (USF), and results after processing (smooth constraint) with ViewTEM (GuidelineGeo/ABEM/Aarhus Hydrogeopyhsics) inversion software are included as tabular geolocated values. A KML indicating point location of the center of each sounding is also provided.
DOI: 10.18739/a2xk84q8c
title: Acoustic travel time and hydrostatic pressure measurements from Sermilik Fjord, southeastern Greenland, 2011-2016

description: This project will develop and test a non-traditional method to measure the time-varying heat content and vertical temperature profile in high-latitude seas, shelves, and fjords using pressure-sensor-equipped inverted echo sounders (PIES). PIES, which are installed on the seafloor below the reach of destructive iceberg keels, present a promising and inexpensive way to improve understanding of fjord dynamics and shelf-fjord interactions and will increase long-term monitoring capabilities in high latitudes where remoteness and harsh conditions hamper traditional in situ observation techniques. The use of PIES to characterize variability at high latitudes is a novel repurposing of an existing technology, but rests on the same principle as the traditional blue-water uses for PIES: due to the dependence of sound speed on temperature, the surface-to-bottom round-trip acoustic-travel-time associated with reflections between the PIES and the air-sea interface is an excellent proxy for heat content in the intervening water column. Furthermore, since reflections from seawater-ice interfaces are also detected when ice is present, PIES also provide a means to characterize the ice component in high-latitude systems. The PIs propose to develop these methods with existing PIES data collected in a 1-year test deployment in Sermilik Fjord in eastern Greenland and with observations to be collected in a 2-year deployment of three PIES in the fjord and on the nearby shelf.
DOI: 10.57745/4l83eg
title: READ_ME.txt

description: Description of the dataset files
DOI: 10.57745/khv8uj
title: Public_Dataset.zip

description: Dataset files
DOI: 10.57745/yhr3b3
title: Marker_sets_for_dataset.pdf

description: Figure describing the names of the markers from the marker-sets associated with each motion capture method.
DOI: 10.18739/a2st7dx5q
title: Tutakoke, Alaska field site climate data 2016

description: These meteorological data were collected to accompany biogeochemical data and gas flux measurements from the Tutakoke field site in the coastal Yukon Kuskokwim Delta in Western Alaska. These data were collected as part of an NSF funded project investigating the interactions between geese and their forage and the effects of a potential trophic mismatch on biogeochemical cycling and greenhouse gas exchanges. This project is a collaboration between researchers at University of Alaska Anchorage and Utah State University.
DOI: 10.18739/a2p55dh2n
title: Methane and nitrous oxide fluxes as a function of the timing of goose grazing, Yukon Kuskokwim Delta, Alaska, 2016

description: This dataset contains data on CH4 and N2O trace gas fluxes measured in the coastal region of the Yukon Kuskokwim Delta during the summer of 2016. These flux data were collected by an NSF funded project (PI: Beard) to determine the effects of a phenological mismatch between goose grazing and the initiation of the growing season, on greenhouse gas fluxes. This project is a collaboration of researchers at University of Alaska Anchorage and Utah State University. These gas flux data were collected in the summer of 2016. This dataset includes trace gas flux data (N2O and CH4), along with associated environmental data.
DOI: 10.18739/a2dn3zw57
title: Beaufort Gyre Exploration Project - Mooring A 2015-2016

description: Mooring A (2015-2016) was deployed for 365 days equipped with
bottom pressure recorder (35031 samples of pressure, and
temperature), a McLane Moored Profilers (326 profiles of
pressure,temperature, salinity and horizontal velocity), an
upward looking sonar (31501411 samples of pressure, temperature
and ice draft), and an Acoustic Doppler Current Profiler (ADCP,
8753 profiles of zonal (U) and meridional (V) velocity as well as
ice drift).
DOI: 10.18739/a2jd4pp9c
title: IceTrendr: An Automated Visualization and Analysis Tool for Mapping Changes in Glacier Extent from Landsat, North America, 1984-2015

description: The major goal of this EAGER project is to create a Big Data mining toolset for the Landsat Time Series that captures, labels, and maps glacier change for use in climate science, hydrology, and Earth science education. This pilot study demonstrates the potential for interactively mapping, visualizing, and labeling glacier changes. What is truly innovative is that IceTrendr not only maps the changes but also uses expert knowledge to label the changes and such labels can be applied to other glaciers exhibiting statistically similar changes. This is much more than just a simple "then and now" approach to glacier mapping. IceTrendr is a means of integrating the power of computing, remote sensing, and expert knowledge to "tell the story " of glacier changes.

Our key findings are that the IceTrendr concept and software can provide important functionality for glaciologists and educators interested in studying glacier changes during the Landsat TM timeframe (1984-present). With additional time and funding, there is the exciting and innovative opportunity to build on the IceTrendr framework, to develop much greater utility for mapping glaciers and characterizing glacier change globally. Although this pilot study focused on just five glaciers, with some future funding and effort, IceTrendr will have the potential to map changing glaciers EVERYWHERE over the full Landsat TM timeframe (1984-present). Specifically, concerns with the Landsat TM imagery are that many images are missing during the period 1984-1995 and the automated cloud mask is not effective requiring the user to manually identify cloud-free images. We found that the visualization of the glacier in the IceTrendr window worked well with high-resolution satellite data from Google Earth and visualization was improved with additional high-resolution images from the Polar Geospatial Center. The automated clustering algorithm was a good first step in glacier mapping and when augmented with glacier outlines from the Randall Glacier Inventory, users could readily see changes in glacier extent, brightness, debris cover, as well as changes in surrounding area including glacial lakes and rivers, vegetation, and moraines.
DOI: 10.18739/a28w3830d
title: Beaufort Gyre Exploration Project - Mooring B 2015-2016

description: Mooring B (2015-2016) was deployed for 365 days equipped with
bottom pressure recorder (35390 samples of pressure, and
temperature), a McLane Moored Profilers (328 profiles of
pressure,temperature, salinity and horizontal velocity), an
upward looking sonar (15619019 samples of pressure, temperature
and ice draft), and an Acoustic Doppler Current Profiler (ADCP,
8848 profiles of zonal (U) and meridional (V) velocity as well as
ice drift).
DOI: 10.18739/a2542j86z
title: Beaufort Gyre Exploration Project - Mooring D 2015-2016

description: Mooring D (2015-2016) was deployed for 365 days equipped with
bottom pressure recorder (35104 samples of pressure, and
temperature), a McLane Moored Profilers (284 profiles of
pressure,temperature, salinity and horizontal velocity), an
upward looking sonar (31583309 samples of pressure, temperature
and ice draft), and an Acoustic Doppler Current Profiler (ADCP,
8776 profiles of zonal (U) and meridional (V) velocity as well as
ice drift).
DOI: 10.18739/a21c1tg39
title: Betula nana shrubs' annual growth ring widths measurements from Toolik Lake moist tussock tundra 1977-2016

description: The dataset consists of tundra shrubs - Betula nana annual growth ring widths measurements after cross-dating. In the current database there are 24 growth curves taken from 11 shrubs, representing an arithmetic mean of three to four radial measurements of rings widths performed within each cross-section. Cross-sections represents both below-ground (roots) and above-ground (main shoot &amp; stem) plant parts. The measurements are presented in microns. NA values represent outermost missing rings, values '1' represents missing rings detected at the cross-dating procedure. Shrubs were collected in summer 2014, 2015 and 2016 in a moist tussock tundra habitat (control site), 880 m SSW from Toolik Field Station. The data are under current development, more extensive serial sectioning is on-going. The data are unpublished, so please contact Agata Buchwal in any matter of data use.
DOI: 10.18739/a2rx93d7q
title: Alaska Science Communication workshop, Sitka, Alaska, 2016-17

description: The Sitka Sound Science Center's (SSSC) Alaska Science Communication (ASC) project training prepared scientists to better convey their research to rural and Alaska Native audiences. This workshop also presented integrated tools for helping scientists, funded by the NSF and working in the Arctic, better connect with rural communities. There is clearly a need to provide training as demonstrated by the 43 applications received for 8 spots. The workshop was led by a high-profile panel that included: Lisa Busch (Executive Director of the SSSC); Elizabeth Arnold, (a science communication expert, University of Alaska journalism professor and former National Public Radio Senior correspondent); Angela Gonzalez (from the Rural Alaska Community Action Program, Inc., an Alaska Native with expertise in rural living); Richard Nelson (a cultural anthropologist and radio producer); Jackie Grebmeier and Lee Cooper, (University of Maryland research scientists with 40 years of experience working in the Arctic). The workshop was held in the Fall of 2016 at the SSSC which has a legacy of scientific training in Alaska and professional, nationally-recognized expertise in science communication. The Sitka workshop setting benefitted from the proximity of Mt. Edgecumbe High School, a state-operated boarding school, which has historically provided secondary education to students from over 90 Alaska Native villages across Alaska. The workshop prepared scientists to use rural community resources to hire a local resident to work on their scientific project. Over the course of three days, scientists received lectures and hands on practice activities and visited a variety of community locations typical of rural Alaska, including the tribal government offices, the public radio station, and a community center where they dined with local residents and talked about their research in a casual setting. Participants also learned some best practices for visiting school classrooms and they observed a Scientists in the Schools lesson within the Sitka Native Education Program. Workshop participants prepared a five-minute talk, without a PowerPoint, and presented it to Mt. Edgecumbe High School students who had pre-lessons in science communication in advance of the workshop. Students then evaluated the participants by filling out feedback forms that tested what the students had learned from the talks. Scientists learned about understanding their audience, replacing technical language with common words, and storytelling. They received training in working with the media, and learned the importance and relevance of tribal governance to scientific work. In person feedback was given at the end of the workshop and then participants filled out an in-depth, online survey. Overall the feedback was extremely positive.
DOI: 10.18739/a2n58cm4c
title: Doctoral Dissertation Research: Mapping Community Exposure to Coastal Climate Hazards in the Arctic: A Case Study in Alaska's North Slope

description: This research investigates community exposure to coastal climate hazards in Alaska's North Slope and incorporates community assessment of the potential effects on loss of land, infrastructure, and other assets. This analysis will inform response strategies and planning by developing new methods of hazard assessment that can support community resilience in the North Slope and potentially serve as a model for advancing assessment and planning in other rural and urban communities. This research will expand traditional assessments of financial exposure to also include non-material factors such as values and priorities of diverse social groups within a community including a diverse set of stakeholders, ranging from multinational oil companies to individual subsistence hunters. This study surveys community views of asset importance and integrates results with a geophysical hazard data model for a coproduced community exposure map of the North Slope coast. This research will contribute to understanding the human and social dimensions of climate change impacts, including how social, economic, political, and cultural factors shape vulnerabilities and condition response strategies. Methods and findings could enhance nation-wide efforts in the United States to map community exposure to coastal climate hazards by demonstrating methods for, and the importance of systematically incorporating non-market values in exposure analysis.

The objectives of the proposed research include adapting the U.S. Geological Survey's (USGS) coastal vulnerability index (CVI) to the Arctic context, and integrating results with formal asset databases and a spatial community landscape value model while working with affected communities during the process to coproduce exposure maps. Specifically, working with North Slope Alaskan communities the study will incorporate wind fetch (i.e., the open water distance over which wind can generate near shore waves, determined by sea ice extent) into the CVI and get community feedback on the results. In addition to community input on the CVI maps, coproducing the exposure maps includes the community assigning values to traditional land use places using existing spatial datasets and mapping and investigating specific sites threatened by coastal hazards with the aim to learn why exposed assets threaten the community.
DOI: 10.18739/a2hd7nt07
title: Cloud and Aerosol Polarization and Backscatter LiDAR measurements taken at Summit Station, Greenland, 2014

description: This data set contains measurements from a Cloud and Aerosol Polarization and Backscatter LiDAR (CAPABL) that is deployed at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. This LiDAR points near-vertically and measures backscatter in three polarization states. Parameters include: backscatter in the parallel channel, the depolarization ratio, and the diattenuation. Detailed information on these parameters and other aspects of the dataset are included in the netCDF header information for each file. The LiDAR is owned by the National Oceanic and Atmospheric Administration's Earth System Research Laboratory. Field operations support is provided by the National Science Foundation's Arctic Observing Network (AON) Program.
DOI: 10.18739/a20g3gz5w
title: North Slope Borough shoreline change risk WebGIS usability workshop.

description: In April 2016, local and regional North Slope manager perspectives were collected on usability of a beta version shoreline change risk WebGIS developed for the Arctic Slope covering the National Petroleum Reserve - Alaska (NPR-A) and the Arctic National Wildlife Refuge (ANWR). The WebGIS is a collaborative effort with the North Slope Borough (NSB). Transcripts from the audio recorded workshop were stored in a MS Excel file. The purpose of the data set is to assess usability of the WebGIS as a formative evaluation effort to develop a shoreline change risk WebGIS for Alaska's Arctic Slope using a collaborative mapping and Instructional Systems Design (ISD) process.
DOI: 10.18739/a2vq2sb1d
title: Western Canada Late Pleistocene Permafrost Caves Speleothem uranium-thorium (U/Th) Data, 2016 - 2019

description: Given the possibility of substantial greenhouse gas release from thawing permafrost in a warmer future, as well as the threats to infrastructure from thawing permafrost, understanding the response of permafrost to past warmth is of fundamental importance. Speleothems (stalagmites and stalactites) only are expected to grow in Arctic caves when the overlying permafrost has thawed and no longer presents an impermeable barrier to seepage from the surface into the cave. In this project, we reconstruct permafrost history in western Canada during Pleistocene interglacials from 131 uranium-thorium (U/Th) ages on 74 speleothems, providing a record of when speleothems grew in Arctic caves and, consequently, under what past climatic conditions permafrost thawed.
 The project uses existing speleothem collections from three areas in western Canada spanning 17° of latitude and isolated to continuous permafrost zones. The U/Th dates document the extent of speleothem growth, and thus permafrost thaw, across variable interglacial conditions of the past 500 thousand years (kyr). The data suggest that permafrost in the Yukon region was largely stable over the last 500 kyr, with only limited thaw during the Marine Isotope Stage (MIS) 11 interglacial. Thawing is more common at the sites in central and southwestern Canada, but the MIS11 interglacial still stands out as the interglacial with the most permafrost melting during the last 500 kyr.
DOI: 10.18739/a2m61bq4p
title: Bering Strait Mooring Data 2010 to 2013

description: Data from year-round moorings deployed in the Bering Strait region. This AON project covers mooring deployments from summer 2010 to summer 2013 in the US and Russian waters of the Bering Strait. Mooring and cruise data are available at our website http://psc.apl.washington.edu/BeringStrait.html, and have been archived at NODC. See also cruise reports available at the same site.
DOI: 10.18739/a2gf0mw9f
title: Bering Strait Mooring Data - summer 2007 to summer 2009

description: Insitu, year-round data from subsurface moorings deployed in both channels of the Bering Strait from summer 2007 - summer 2009 (8 moorings). All moorings recorded lower layer water velocity, temperature and salinity ~ hourly. Six moorings recorded upper layer temperature and salinity. Some instruments also recorded fluorescence and turbidity. Six upward looking Acoustic Doppler Current Profilers (ADCP) recorded water velocity at different levels in the east of the channel and some measure of ice velocity and ice thickness. These moorings were recovered and redeployed in October 2008 and finally recovered in August 2009. The mooring program is funded by the National Science Foundation funded Arctic Observing Network (NSF-AON), with logistical support from the National Oceanic and Atmospheric Administration - Russian American Long-Term Census of the Arctic (NOAA-RUSALCA) program, lead PI. T. Weingartner. Related data sets include various conductivity, temperature, and depth (CTD) data and other years of Bering Strait moorings, deployed almost continuously since 1990. For an overview, see http://psc.apl.washington.edu/BeringStrait.html, and/or search this archive or the National Oceanographic Data Center (NODC). Bering Strait data are standardly submitted to NODC for permanent archiving.
DOI: 10.18739/a2bn9x355
title: Bering Strait Mooring Data - summer 2006 to summer 2007

description: Insitu, year-round data from subsurface moorings deployed in both channels of the Bering Strait from summer 2006 - summer 2007 (6 moorings). Moorings recorded lower layer water velocity, temperature and salinity ~ hourly. Some instruments also recorded fluorescence and turbidity. Two upward looking Acoustic Doppler Current Profilers (ADCP) (one in the western channel, one in the east of the eastern channel) recorded water velocity at different levels in the east of the channel and some measure of ice velocity and ice thickness. For full details, see Readme file below. Data are available via our website (Data Access link below) and from the National Oceanographic Data Center (NODC) (related data link below). The western (Russian) channel deployments were funded by the NOAA-RUSALCA (Russian American Long-Term Census of the Arctic) program, lead PI. T. Weingartner. The eastern (US) channel deployments were funded by the Alaskan Ocean Observing System (AOOS), PI. R. Woodgate. Related data sets include various conductivity, termperature and depth (CTD) data and other years of Bering Strait moorings, deployed almost continuously since 1990. For an overview, see http://psc.apl.washington.edu/BeringStrait.html, and/or search this archive or NODC. Bering Strait data are standardly submitted to NODC for permanent archiving.