cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.naefbk
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
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 "TaxonKey is Mammalia"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027702-241107131044228/datasets/export for details.
DOI: 10.18739/a2hq3rz96
title: Warming and irradiance measurements in the Arctic: Determining the link between solar energy absorption and surface warming through long term observations

description: The Arctic is considered to be a sentinel system in terms of climate change. The western Arctic in particular has experienced the largest positive anomalies in open water fraction, solar energy input, and sea surface temperature. The attenuation of light in surface waters has been identified as one of the key uncertainties in the modeling of Arctic Ocean physical properties, and has been found to significantly impact the simulation of sea ice thickness and upper ocean heat content. The vertical partitioning of solar radiation absorbed in the mixed layer of the Arctic Ocean, and the type of light absorbing compounds present determine the magnitude of heating. This heat directly impacts the rate of sea ice melt. The objectives of the proposed research are to quantify the connection between seasonal warming of arctic surface waters and the absorption of solar energy, and additionally to identify the presence and seasonal cycling of materials responsible for this absorption. Seasonal changes in the attenuation of solar radiation within the sea ice and upper 30m of the water column will be measured at high temporal resolution (hourly) by a new proof of concept buoy system. Temperature and PAR (photosynthetically active radiation) irradiance measurements will be made using optical sensors paired with thermisters within the water column and sea ice. A fluorometer will be used to quantify chlorophyll, colored dissolved organic material (CDOM) and light backscattering within surface waters. These sensors will be used to calculate diffuse attenuation coefficients (Kd) within the ice and water column, and to determine the seasonal cycling of phytoplankton and CDOM under the ice. The relationship between these optical and temperature observations will enable us to constrain the daily water column absorption component of the Arctic heating budget. This approach will fill in gaps in the current Arctic Observing Network strategy, expanding the observations to include a determination of solar energy absorption, and seasonal cycling of optically active compounds, which are known to have a quantifiable impact on solar heating. The long range goal of this research is to work towards the closure of the Arctic heating budget by constraining an important and poorly understood term. The ultimate goal of this concept would see a network of these buoys throughout the Arctic, in both ice-covered and open waters. Our work plan includes several deployments in multiyear ice. The location of the buoys will be 1) Multi-year ice in the Beaufort gyre in early spring, 2) the Geomission ice base (previously Catlin Arctic Survey) in the Canadian Arctic in early spring. Data at this site will be augmented by additional measurements made whilst at the camp, along with complementary studies by other Geomission projects and 3) in the Beaufort Gyre, deployed by the Beaufort Gyre Exploration Project in late spring within their network of ice-tethered profilers.
DOI: 10.18739/a2cz3254c
title: Aerial census of reindeer in Taimyr, Russia, 1969

description: The dataset is a part of a comprehensive information system that provides insight into the historical relationship between humans, climate, environment, and reindeer in Taimyr, Russia. This dataset is a product of digitization and reanalysis of historical aerial observational data collected in 1969 by the researchers from the Extreme North Agriculture Research Institute. The data contain spatial data representation and descriptions based on the approximate flight paths undertaken in July of 1969 reconstructed from the unpublished aerial census report and data log.
The Taimyr Reindeer Migration Reanalysis (TAMARA) project is an integral part of the worldwide network of reindeer observation programs.
DOI: 10.18739/a2862bc0j
title: Soil organic carbon and microbial lipid radiocarbon content along Alaskan north-south transect

description: Active layer soil cores along a north-south transect were collected in August 2014 from near Deadhorse, AK to the northern Boreal forest near Sukapak Mountain. We quantified the viable microbial community as phospholipid fatty acids and determined the radiocarbon (14C) content of both the soil organic carbon and the phospholipid fatty acids. We also determined the amount of organic carbon, organic nitrogen and stable carbon isotopic composition of the soil organic matter.
DOI: 10.18739/a20r9m44b
title: Collaborative Research: Investigating the Influence of Sea-surface Variability on Ice Sheet Mass Balance and Outlet Glacier Behavior using Records from Disko Bugt, West Greenland

description: This project will further understanding of ocean-ice-atmosphere interaction around the Jakobshavn Isbrae and Disko Bay region of west Greenland, with a particular focus on the role of sea surface temperature and sea ice variability in modulating past outlet glacier behavior and ice sheet/cap mass balance (snowfall and melt) over the past two centuries. The PIs will reconstruct past environmental conditions in the Disko and Baffin Bay region based on new glaciochemical and stratigraphic records from three 100-m deep ice cores, several firn cores, and geophysical studies from three sites surrounding Disko Bay. Their field activities will commence in 2013 with the primary ice coring activity in 2014 and lab and computation work following to derive climate reconstructions from the cores. The results will complement recent glaciological studies of regional ice dynamic behavior, as well as recent paleoceanographic and glacial geologic reconstructions of conditions from this area and era. Das and Frey will each supervise a full-time PhD student, and Evans will supervise undergraduate research assistants and senior theses. A high school science teacher will also participate in the field work and interact with students at his school in Massachusetts as well as from the ice.
DOI: 10.18739/a2w08wh0r
title: Snow pit major ion and methanesulfonic acid concentrations, Nuussuaq Ice Cap, Greenland, 2015

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a2r785p7v
title: Snow pit major ion and methanesulfonic acid concentrations, Nuussuaq Ice Cap, Greenland, 2014

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a2gq6r28w
title: Snow pit major ion and methanesulfonic acid concentrations, Ice Sheet West, Greenland, 2014

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years)
DOI: 10.18739/a2mg7fw3q
title: Firn core major ion and methanesulfonic acid concentrations, Nuussuaq Ice Cap, Greenland, 2014

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a2bz61844
title: Firn core major ion and methanesulfonic acid concentrations, Ice Sheet West, Greenland, 2014

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a27659g1s
title: Snow pit major ion and methanesulfonic acid concentrations, Ice Sheet East, Greenland, 2014

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a23j3918s
title: Firn core major ion and methanesulfonic acid concentrations, Ice Sheet East, Greenland, 2014

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a2zs2kd4w
title: Snow pit major ion and methanesulfonic acid concentrations, Ice Sheet Central, Greenland, 2015

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.15468/dl.wb88xm
title: Occurrence Download

description: A dataset containing 8575 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Emilia sonchifolia (L.) DC. ex Wight",
 "HasGeospatialIssue is false",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 "Year is greater than or equal to 1900"
 ]
}

 The dataset includes 8575 records from 352 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027704-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.18739/a2v11vm02
title: Core major ion and methanesulfonic acid concentrations, Ice Sheet Central, Greenland, 2015

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a2q814s6p
title: Snow pit major ion and methanesulfonic acid concentrations, Disko Island Ice Cap, Greenland, 2015

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
Publication Date
DOI: 10.18739/a2kh0f01g
title: Snow pit major ion and methanesulfonic acid concentrations, Disko Island Ice Cap, Greenland, 2014

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a2fq9q575
title: Firn core major ion and methanesulfonic acid concentrations, Disko Island Ice Cap, Greenland, 2014

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a29z90c4w
title: Core major ion and methanesulfonic acid concentrations, Disko Island Ice Cap, Greenland, 2015

description: Major ion and methanesulfonic acid (MSA) concentrations were measured on high resolution (3-5cm) samples taken in two field seasons (April 2014 and April 2015). Samples collected in 2014 include five snow pits and four hand-augured firn cores from five locations. 2015 samples include 3 snow pit and two long cores. Glaciochemistry will be used, in combination with geophysical data and satellite records to reconstruct past (~200 years) environmental conditions in West Greenland.
DOI: 10.18739/a2696zz30
title: Tsunami and Paleotsunami Data, Islands of the Four Mountains, Alaska, 2014

description: This dataset contains observations of the inland extent (elevation above and distance inland from the shoreline) of the 1957 Aleutian tsunami, plus stratigraphic information of likely paleotsunami deposits on Chuginadak Island, in the Islands of the Four Mountains, Aleutians, Alaska. All observations will be published in special issue with other collaborators on the project (citation available after publication), or can be obtained from the author at macinnes@geology.cwu.edu
This dataset was collected as part of an interdisciplinary human/ecosystems resilience project in the Islands of the Four Mountains that included the study of hazards caused by earthquakes, tsunamis and volcanic eruptions. The Four Mountains island group provide an excellent opportunity to assess the development of prehistoric human adaptations to geological hazards and environmental change because they lie within a zone of high catastrophic potential. As examples, Mt. Cleveland, has erupted explosively more than 20 times in the last decade and during the time of prehistoric human habitation. The Aleutian plate boundary is the site of four earthquakes having a magnitude greater than 8 and dozens with magnitudes greater than 7, and these have generated tsunamis historically and prehistorically. 
The Four Mountain prehistoric sites are little studied but are highly significant for interpreting the role of geologic hazards on human migration and societal development in the Aleutian archipelago. The 2-year project (2014-2015) included a team of professional and student archaeologists, geologists, ecologists, and zoologists. Extensive datasets, in addition to the tsunami dataset here, include radiocarbon, geological, paleoenvironmental, and cultural data. These data yield novel insights into the record of geological hazards, human coping mechanisms, changing subsistence, and adaptations during the prehistoric and European contact periods. Additionally, assessing the degree to which geological hazards in the Aleutian archipelago disrupted prehistoric human and ecological systems has important lessons for current inhabitants of the northern Pacific Rim.
DOI: 10.18739/a22j68504
title: Fire Severity Effects On Nutrient Dynamics And Microbial Activities In A Siberian Larch Forest

description: High-latitude ecosystems store large amounts of carbon in soil organic matter and are among the most vulnerable to climate change. Fire severity and frequency are increasing in boreal ecosystems, and these events are likely to have direct effects on climate feedbacks via increased emissions of carbon (C) from combustion of soil organic matter and vegetation, and indirect effects on climate feedbacks via changes in vegetation composition, ground thaw, and edaphic variables. This study examines the indirect effects of fire on climate feedbacks by determining how fire affects C, nitrogen (N), and phosphorus (P) pools, soil microbial processes, and how these effects scale across severity and time since fire. In this study we created experimental burns of three severities in a larch forest in the northeastern Siberian arctic, near Cherskiy, Russia, and quantified dissolved C, nitrogen (N), and phosphorus (P), and microbial respiration and extracellular enzyme activities at 1-day, 8-days, and 1-year post-fire. 
 We found labile C and nutrients increased immediately post-fire, but were not statistically different from unburned controls within a week. Phosphorus alone remained elevated through 1-year post-fire. Fire severity had a linear effect on extracellular enzyme activities, and suppressed most extracellular enzyme activities 1-year post-fire. Soil respiration was reduced by half in high severity plots 1-year post-fire, while net rates of N mineralization increased by an order of magnitude. Microbial communities recovering from more severe fires have the possibility to decrease future ecosystem C losses through reduced respiration. The changing fire regime in permafrost ecosystems has the potential to alter soil microbial community dynamics, the retention of nutrients, and the stoichiometry of C, N, and P availability, and these indirect effects of fire will ultimately drive post-fire regeneration and feedbacks of fire on global climate.
DOI: 10.18739/a2xs5jh54
title: Precipitation oxygen and hydrogen isotopes, Toolik Lake, Alaska, 2016

description: As part of our broader efforts to understand how global climate change is influencing Arctic ecosystems, we maintain efforts to collect and analyze precipitation from Toolik Field station. In 2016 these efforts were focused on understanding the isotopic characteristics of potential plant water sources. To this end, precipitation was collected with a funnel following every precipitation event from June through August (30 precipitation events), and snow samples were collected in 20cm depth increments from the drift created by the snowfence at the moist tussock tundra site. Samples were analyzed for 18O and 2H with a Picarro L2130-i cavity ring down-spectrometer at the University of Alaska-Anchorage.
DOI: 10.18739/a2p843w5z
title: Leaf carbon and nitrogen isotopes, Toolik Lake, Alaska, 2016

description: We collected leaf gas exchange measurements during three time periods in the 2016 summer, June 19-24, July 12-23 , and August 11-14. Fully-emerged, healthy (not galled or senesced) leaves were used from the four dominant species, Salix pulchra and Betula nana (deciduous shrubs), Ledum palustre (evergreen shrub), and Eriophorum vaginatum (graminoid). Leaves used in gas exchange measurements were oven dried at 40°C and ground to a fine powder with a Mini Beadbeater-16 (Biospec Products Inc., Bartlesville, OK) with 3.2 mm ball bearings. Subsamples were analyzed for N(%) and C(%) and 13C and 15N with a Costech Elemental 4010 elemental analyzer (Costech Analytical, Valencia, CA, USA) linked to a continuous flow isotope ratio mass spectrometer (model DeltaPLUS XP, Thermo-Finnegan Scientific, Waltham, MA) at the University of Alaska-Anchorage.