cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a2n00zt5t
title: The Beaufort Gyre System: Flywheel of the Arctic Climate?

description: This project explores the hypothesis that the state and variability of the Beaufort Gyre (BG) system (ocean, sea ice and atmosphere) are natural indicators of Arctic climate health. The major goal of this project is to understand the structure of the BG system, its regulating mechanisms, and impact on Arctic climate. The project team intends to accomplish this by investigating the composition and variability during the period 2003 - 2008 of the atmospheric, cryospheric and oceanic components of this system based on a specially designed observational program, improved modeling studies, and analyses of improved and reconstructed historical data sets. The project will use several major methods to explore the BG system: in situ observations, satellite remote sensing technology, methods of tracer analyses, numerical modeling, historical data mining and reconstruction procedures, and statistical analyses tools. New technologies will be applied: moored profiler instrumentation, satellite techniques allowing mapping of sea ice thickness and sea surface heights in the ice covered regions, and an easily-deployed Ice-Tethered Profiler (ITP) capable of returning daily high-vertical-resolution measurements of upper ocean temperature and salinity. This project relies extensively on working with other NSF projects, and Canadian collaborators, subcontracting with Russian scientists, and freely obtaining other products from our USA and international collaborators from Germany and UK. The specific scientific objectives are: Determine the circulation of the BG throughout the entire water column, and its variability at synoptic to interannual time scales; Measure time series of sea ice draft and determine statistics of the sea ice thickness (SIT), Determine the statistics of ice drift, ocean currents and sea surface heights (SSH) in the BG; Quantify the vertical and temporal scales of variability in the temperature and salinity fields, especially in the halocline and the Pacific and Atlantic layers where many dramatic changes have occurred during the past decade; Assess the impact of this region on large-scale changes in the circulation and properties of the Arctic Ocean; Use all these measurements to increase dynamical understanding of the BG flywheel system and to encourage improved modeling of this system; Compare the observed variations with concurrent variations in the local ocean/atmosphere environment and with variations in atmospheric circulation indices; Synthesize project results characterizing oceanic, cryospheric and atmospheric systems of the BG in order to describe and understand mechanisms and phenomena, both regulating and being regulated by the BG flywheel; Provide quality controlled documented data sets to the Arctic research community and share results of the project with the wider community through an outreach program.
DOI: 10.18739/a2h70811g
title: Solubility Enhancement Data, Toolik Lake Field Station, Alaska

description: Polybrominated diphenyl ethers (PBDEs) are a class of brominated flame retardant that is distally transported to the arctic. Little is known about the fate of PBDEs in arctic surface waters, especially in the presence of dissolved organic matter (DOM). DOM has been shown to interact with hydrophobic organic contaminants and can alter their mobility, bioavailability, and degradation. In this dataset, the partitioning of six PBDE congeners between Arctic DOM and water was measured using the aqueous solubility enhancement (SE) method. Measured dissolved organic carbon (DOC)-water equilibrium partition coefficients (KDOC) values were nearly an order of magnitude lower than previously reported values for the same PBDE congeners and are in units of L/kg of organic carbon. Measured results compared favorably with values calculated using poly-parameter linear free energy models (pp-LFER) developed for other DOM. Log KDOC values initially increased with increasing PBDE hydrophobicity but approached a threshold value of ~5, which is likely due to elevated steric hindrance of highly brominated congeners. This study is the first to comprehensively measure KDOC values for a range of PBDE congeners with DOM isolated from arctic surface waters. DATA ARE DUPLICATED IN MULTIPLE FILES: CSVs are provided to ease analysis along with the original XLS and XLSX files containing the same data for reference.
DOI: 10.18739/a2cf9j68n
title: Soil moisture and temperature across an experimental burn severity gradient

description: This data set includes soil moisture, temperature, and electrical conductivity data from 2m x 2m plots that were experimentally burned in the summer of 2012. The study site is located near the Northeast Science Station, in Cherskii, Russia. Data were collected using Decagon GS-3 probes and an EM50 data logger, at hourly resolution over the entire study period. Measurements are currently ongoing and will be updated annually. Varying fuel loads were used to achieve a range of burn severities. Contact Heather Alexander at the University of Texas at Brownsville for more information on the experimental treatment.
DOI: 10.15468/dl.ghe84w
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Euphorbia fragifera Jan ex Link, 1822)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 2000"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027676-241107131044228/datasets/export for details.
DOI: 10.18739/a27s7hs6b
title: Understory micrometorological data across a larch forest density gradient

description: This data set contains half-hourly observations of understory radiation, air temperature, relative humidity, and soil moisture and temperature at two depths. Data are collected in six larch stands in northeastern siberia: two each of high, medium, and low tree density. The accompanying density data can be found at https://www.aoncadis.org/dataset/Stand_Inventory.html.
DOI: 10.15468/dl.6ped8t
title: Occurrence Download

description: A dataset containing 43963 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Country is Canada",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "PublishingOrg is e2e717bf-551a-4917-bdc9-4fa0f342c530",
 "TaxonKey is Branta canadensis (Linnaeus, 1758)",
 "Year 1980-1994"
 ]
}

 The dataset includes 43963 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027675-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.18739/a2086358j
title: Diatom and Particle Size Analysis from the Bering Sea Shelf

description: Climate change is amplified in the Arctic, most dramatically seen as a significant reduction in summer sea ice. Unfortunately, satellite observations of sea ice only extend back to 1979, and direct observations before then are spotty at best. Recently, there have been several advances in sea ice proxies. Specifically improvements in diatom-based proxies and the molecular biomarker, IP25, have allowed quantitative reconstructions of Arctic sea ice. Today, the Bering Sea is seasonally covered in sea ice, and diatoms dominate primary productivity there. This makes it an ideal location for a diatom-based sea ice proxy. This proxy is still in development and will be based on the data presented here compared to satellite-derived sea ice concentration averaged over the ten years preceding sampling. The data set archived here contains diatom counts and detailed grain size analysis for a suite of core tops spanning the range of annual sea ice concentration found in the Bering Sea. Samples were collected on board the Healy during May 2006 and June 2007 as well as from two USGS cruises in 1969. Fifty-seven diatom taxa are recorded and diatom counts are presented in relative percent abundances. Grain size is calculated using a laser diffraction particle size analyzer and is reported as weight percent for grain size bins ranging from 0.375 to 1822 Î¼m.
DOI: 10.18739/a2vh5cj35
title: Ice properties and permeability tests from SUBICE 2014

description: This data consists of information about sea ice conditions observed in situ during the 2014 SUBICE cruise in the Chukchi sea. Observations were collected at a series of on-ice stations. The files contain the location of ice stations, mean snow depth and ice thickness at the stations, ice temperature and salinity profiles from cores, and the results of permeability slug tests. The data is discussed more fully in a publication by Polashenski et al., 2016 in JGR.
DOI: 10.18739/a2qr4nq9d
title: Collaborative Research: An investigation of wave dynamics in the Arctic mesosphere and coupling between the lower and upper polar atmosphere

description: The research objective is to utilize a suite of instruments, including an airglow imager, to investigate short-period gravity waves in the Arctic atmosphere over Alaska. Short-period gravity waves are an important component of the larger atmospheric circulation as these waves are believed to transport a large amount of vertical moment flux into the mesosphere and lower thermosphere (MLT) region. While the propagation nature and sources of these waves have been studied extensively at low- and mid-latitudes, little is known about their behavior at high latitudes. Recent efforts have begun to characterize the waves over the Antarctic continent, while the project proposed here will focus on the Arctic. Specifically, the proposed research will establish a long-term winter time series of short-period gravity waves in the Arctic, including their dominant source regions, and influences of large-scale tidal and planetary wave motion. The co-located Rayleigh LIDAR will provide essential high vertical resolution temperature measurements to help elucidate the vertical wave propagation, individual wave contribution to the Eliassen-Palm (EP) flux, and coupling between the lower and upper atmosphere during stratospheric warming events.
DOI: 10.18739/a2m03xx5k
title: Collaborative Research: P2C2--Reconstructing Central Alaskan Precipitation Variability and Atmospheric Circulation during the Past Millennium

description: Large-scale atmospheric circulation systems affect the geographic distribution of precipitation in western North America, yet little is known about how these systems may have varied before the instrumental period of the last 150 years. The main goal of this project is to reconstruct the history of precipitation in Alaska during the last thousand years using ice core records of snow accumulation. The researchers plan to collect several new ice cores from the Mt. Hunter Plateau in the Alaska Range of Denali National Park and the new ice cores will be combined with an existing spatial array of ice cores in the region to map changes in the spatial patterns of precipitation. Because changes in atmospheric circulation patterns caused by ENSO and the Pacific Decadal Oscillation (PDO) affect where the precipitation falls, this spatial array of ice cores will provide a record of how these larger scale climate systems have varied during the last thousand years. The project will focus on determining the differences in the precipitation patterns at the Little Ice Age (approximately 200 to 600 years ago) and Medieval Climate Anomaly (approximately 800 to 1,200 years ago).

This project will evaluate how changes in the climate state affect atmospheric circulation and precipitation. In addition the project includes K-12, undergraduate and graduate education activities, and, in conjunction with the National Park Service, the development of an interactive display showing the climate history of the region and the history of glacier advance and retreat in Denali National Park.
DOI: 10.18739/a2g73742q
title: Airglow Image Data 2011 2 of 5

description: Airglow image data of various emissions are stored in .png image format. The filename indicates the observation site (PFRR = Poker Flat Research Range), the observation time (year, month, day, hour, min, and sec) of image acquisition start, and finally the emission identifier follows (for example OH or Na). Please note that this data set is the RAW data and contain the entire set of images obtained during the project period. This include high, medium, and low quality image data. While we do not require co-authorship in publications using the data set, we encourage users to contact the PI to make sure the data has been interpreted correctly. Otherwise, standard scientific ethic is expected.
DOI: 10.18739/a2bk16q0d
title: Firn Temperatures from NW Greenland

description: Firn temperatures taken in the NW sector of the Greenland Ice Sheet in 2013. Temperatures were collected at locations where similar data was first observed by Carl Benson in 1952-55 (see Research Report 70 of the Snow Ice and Permafrost Research Establishment (SIPRE), Benson, 1962). These data show the long term change in firn temperature caused both by warming of mean annual temperatures, and an increase in percolation intensity. Data is used and further discussed in: Polashenski, C., Courville, Z., Benson, C., Wagner, A., Chen, J., Wong, G., ... &amp; Hall, D. (2014). Observations of pronounced Greenland ice sheet firn warming and implications for runoff production. Geophysical Research Letters, 41(12), 4238-4246.
DOI: 10.18739/a26t0gw74
title: Snow/Firn Chemistry from NW Greenland

description: Snow chemistry data collected along traverses in spring 2013 and 2014 from the NW sector of the Greenland ice sheet, including both soluble ions and black carbon. In 2013, approximately 550 samples, collected at 25 sites, with sampling at 3 cm vertical resolution targeting the uppermost 21 cm of snow and the region around the 2012 melt layer. In 2014, approximately 2000 samples collected at 37 sites, with sampling intended to capture at least one year's accumulation at each site at 3 cm vertical resolution. Samples mostly represent snow which fell in 2012-2014, except a few older samples in sites of low accumulation.
DOI: 10.18739/a2z892f72
title: Airglow Image Data

description: Airglow image data of various emissions are stored in .png image format. The filename indicates the observation site (PFRR = Poker Flat Research Range), the observation time (year, month, day, hour, min, and sec) of image acquisition start, and finally the emission identifier follows (for example OH or Na). Please note that this data set is the RAW data and contain the entire set of images obtained during the project period. This include high, medium, and low quality image data. While we do not require co-authorship in publications using the data set, we encourage users to contact the PI to make sure the data has been interpreted correctly. Otherwise, standard scientific ethic is expected.
DOI: 10.18739/a2th8bn3x
title: Beaufort Gyre Exploration Project - Mooring D 2012-2013

description: Mooring D (2012-2013) was deployed for 351 days equipped with
bottom pressure recorder (33670 samples of pressure, and
temperature), a McLane Moored Profilers (257 profiles of
pressure,temperature, salinity and horizontal velocity), an
upward looking sonar (15145749 samples of pressure, temperature
and ice draft), and an Acoustic Doppler Current Profiler (ADCP,
8415 profiles of zonal (U) and meridional (V) velocity as well as
ice drift).
DOI: 10.18739/a2pr7mt95
title: Beaufort Gyre Exploration Project - Mooring B 2007-2008

description: Mooring B (2007-2008) was deployed for 353 days equipped with bottom pressure recorder (33879 samples of pressure, and temperature), McLane Moored Profiler (69 profiles of pressure, temperature, salinity and horizontal velocity), and an upward looking sonar (15279220 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a2k06x167
title: Beaufort Gyre Exploration Project - Mooring A 2007-2008

description: Mooring A (2007-2008) was deployed for 353 days equipped with bottom pressure recorder (16967 samples of pressure, temperature and salinity), two McLane Moored Profilers (shallow: 315 profiles, Deep:893 profiles), and an upward looking sonar (15321140 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a2fb4wm4x
title: Beaufort Gyre Exploration Project - Mooring C 2006-2007

description: Mooring C (2006-2007) was deployed for 343 days equipped with bottom pressure recorder (16460 samples of pressure, temperature and salinity), McLane Moored Profiler (306 profiles of pressure, temperature, salinity and horizontal velocity), and an upward looking sonar (14812381 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a29k45t1n
title: Beaufort Gyre Exploration Project - Mooring B 2006-2007

description: Mooring B (2006-2007) was deployed for 378 days equipped with bottom pressure recorder (32820 samples of pressure, and temperature), McLane Moored Profiler (302 profiles of pressure, temperature, salinity and horizontal velocity), and an upward looking sonar (14766800 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a25t3g06t
title: Beaufort Gyre Exploration Project - Mooring A 2006-2007

description: Mooring A (2006-2007) was deployed for 347 days equipped with bottom pressure recorder (16638 samples of pressure, temperature and salinity), McLane Moored Profiler (no returned data), and an upward looking sonar (14971579 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a2222r620
title: Beaufort Gyre Exploration Project - Mooring D 2005-2006

description: Mooring D (2005-2006) was deployed for 376 days equipped with bottom pressure recorder (33177 samples of pressure, and temperature), McLane Moored Profiler (336 profiles of pressure, temperature, salinity and horizontal velocity), an upward looking sonar, and an Acoustic Doppler Current Profiler (ADCP, 6556 profiles of zonal (U) and meridional (V) velocity as well as ice drift). The upward looking sonar did not return data for this deployment.
DOI: 10.18739/a2x921j7c
title: Beaufort Gyre Exploration Project - Mooring C 2005-2006

description: Mooring C (2005-2006) was deployed for 375 days equipped with bottom pressure recorder (17995 samples of pressure, temperature and salinity), McLane Moored Profiler (333 profiles of pressure, temperature, salinity and horizontal velocity), and an upward looking sonar (16186499 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a2sj19r4q
title: Beaufort Gyre Exploration Project - Mooring B 2005-2006

description: Mooring B (2005-2006) was deployed for 378 days equipped with bottom pressure recorder (36282 samples of pressure, and temperature), McLane Moored Profiler (334 profiles of pressure, temperature, salinity and horizontal velocity), and an upward looking sonar (962840 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a2ns0kz12
title: Beaufort Gyre Exploration Project - Mooring A 2005-2006

description: Mooring A (2005-2006) was deployed for 370 days equipped with bottom pressure recorder (17755 samples of pressure, temperature and salinity), McLane Moored Profiler (279 profiles of pressure, temperature, salinity and horizontal velocity), and an upward looking sonar (15972940 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a2j38kh8t
title: Beaufort Gyre Exploration Project - Mooring C 2004-2005

description: Mooring C (2004-2005) was deployed for 368 days equipped with bottom pressure recorder (21208 samples of pressure, temperature and salinity), McLane Moored Profiler (328 profiles of pressure, temperature, salinity and horizontal velocity), and an upward looking sonar (15903339 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a2db7vq55
title: Beaufort Gyre Exploration Project - Mooring B 2004-2005

description: Mooring B (2004-2005) was deployed for 362 days equipped with bottom pressure recorder (20844 samples of pressure, temperature and salinity), McLane Moored Profiler (322 profiles of pressure, temperature, salinity and horizontal velocity), and an upward looking sonar (15630259 samples of pressure, temperature, and ice draft).
DOI: 10.18739/a27m0410n
title: Passive acoustic data from A3 in the Bering Strait 5 of 17 (130214_120000_AU_BS03.wav to 130328_020000_AU_BS03.wav)

description: Passive acoustic data from instruments on moorings in the Bering Strait region. The data for this instrument were collected at 66.76 N latitude and 168.95 W longitude. Data were recorded from 10 Hz - 8192 Hz (16 kHz sample rate) the first 10 minutes of each hour from September 2012-May 2013 and July 2013-July 2014
DOI: 10.18739/a23t9d66b
title: Collaborative Research: Interactions Between Air Temperature, Permafrost and Hydrology in the High Latitudes of Eurasia

description: This proposal builds off of work conducted under the Freshwater Integration program and seeks to address two interrelated hypotheses aimed at improved understanding of the Arctic system at various time and space scales. The first hypothesis will explore the seasonal relationship between air temperature, river ice thickness, and winter runoff, while the second will investigate the contribution of thawing permafrost to river discharge. Research will focus on several river basins and feeder streams within the Russian Arctic and sub-Arctic where hydrometeorological measurements have been collected since 1950 and climate data are available from a number of global data archives. These data sets will be augmented by new field data collected by the PI team, focusing on permafrost, isotopic, hydrochemical, and higher time and spatial resolution hydrologic sampling. This suite of measurements will be used to test the hypotheses using watershed scale models and the Geophysical Institute Permafrost Lab model coupled to the Water Balance and Discharge Transformation Model (WBMplus). Graduate students and an undergraduate will receive training in fieldwork and modeling, and the grant will support an early career principal investigator. Results and methodology will also be incorporated into courses taught at the awardee institutions as well as through minority high school outreach programs. During fieldwork, an ongoing collaboration with residents near Igarka will be maintained and materials provided for their local permafrost museum.