cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a2125q96p
title: Plant community response to warming and herbivory on sub-arctic coastal terraces in Western Alaska, 2015 - 2016

description: To predict future changes in high latitude biomes, it is important to understand how plant communities will respond to increased temperature. Across sub-arctic systems, warming generally increases aboveground biomass in plant communities. Specifically, in arctic graminoid systems, experimental warming has been shown to increase productivity, aboveground biomass and leaf litter production, and stimulate early-season growth. Warming can also decrease species richness, and reduce foliar nitrogen (N) in aboveground biomass over the growing season.
 Migrating geese are important grazers in arctic and subarctic ecosystems during summer breeding months. Avian herbivores depend on high quality forage (high N) and are often found at high enough densities to impact vegetation communities. Exclosure experiments show that goose herbivory reduces biomass of herbaceous species but increases net above-ground primary production and N concentrations of grazing-tolerant sedges, and sometimes even increases species richness. Goose herbivory also alters plant physiological processes as evidenced by increased N uptake by plants, as well as the biophysical processes 
that affect N cycling through trampling and fecal deposition. Thus, high-density populations of avian herbivores can have top-down control on their vegetation communities.
 While increasing global temperatures may increase aboveground biomass and decrease species richness in plant communities, herbivory could potentially mediate, or even reverse, these responses. For example, Post and Pedersen (2008) suggest that herbivory may exacerbate plant response to warming because both effects increase rates of productivity, while simultaneously reducing the effects of warming on aboveground biomass. If the interaction between warming and herbivory causes a shift in plant abundance and community functional groups, this could cascade through the system resulting in changes in nutrient cycling and plant-animal feedbacks.
 The Yukon-Kuskokwim (Y-K) Delta is one of the largest river deltas in the world and is a globally important breeding area for millions of long-distance migratory waterfowl and shorebird species. The majority of these species nest in high densities close to the ocean among lowland coastal habitat. Geese populations utilize overlapping habitats and shift from more coastal to more interior habitats over the growing season.
 The expectations for how vegetation responds to increasing temperature and changes in herbivory with climate change will vary for different plant communities. We propose to conduct an experiment that investigates the impact of warming and herbivory on three coastal sub-arctic vegetation communities in the Y-K Delta addressing the following questions: 1) How does warming impact vegetation biomass and community composition; 2) How does herbivory impact species composition and plant functional groups; and 3) How do the different responses to warming and herbivory interact?
DOI: 10.18739/a2wd3q23j
title: Kuparuk River Discharge, Alaska, 2013-2015

description: Understanding the impacts of climate change on freshwater ecosystems is highly dependent on quantifying the associated changes in instream temperatures. However, this can be complicated because these temperatures are related to both changing meteorology (e.g., air temperature and precipitation) and hydrology (e.g., instream flows and lateral inflows). The ability to predict climate related changes on instream thermal regimes in Arctic streams is limited by the minimal understanding of key processes and the availability of data to quantify heat fluxes. The investigators hypothesized that the dominant heat fluxes within Arctic streams are similar to those in temperate climates but that the relative magnitude of the heat fluxes differ, and that quantification of lateral inflows is key in predicting water temperatures. To test this hypothesis, they would addressed three research questions regarding 1) the changing importance of key heat fluxes throughout the warm season; 2) the importance of lateral inflows to understanding instream temperature regimes; and 3) the sensitivity of instream temperatures to climate change drivers. These data provide information regarding the flow regimes throughout the Kuparuk Basin that are used within instream temperature modeling under varied flow conditions.
DOI: 10.18739/a2rn30808
title: Scripps carbon dioxide (CO2) program data, Alert, Canada (1985-present) and Point Barrow, Alaska (1961-1964 and 1974-present)

description: This dataset consists of measurements of carbon dioxide (CO2) concentration and isotopic composition (13C/12C and 18O/16O) taken in Alert, Canada and Point Barrow, Alaska.
DOI: 10.18739/a2mw28f6h
title: Eastern Lake water hourly time series Temperature, depth, dissolved oxygen, conductivity, water level (CALON)

description: These folders contain .csv files of lake water temperature time series collected during the period April to August. Data collected at the same locations using the same configuration will be found in the yearly files, where the year is defined as that year when the data were downloaded.
 At the first subfolder level, the lakes are differentiated by the Eastern and Western Transects; see accompanying jpg image (CALON_sites_overview.jpg) and list of Lake Float Locations. The instrumentation configuration is identical in most cases. Generally, a rope is attached to an anchor. The other end of the rope is attached to a float. An Onset computer U12-015 water temperature data logger is affixed to the rope 30 cm below the float. Another data logger (U20) is attached to the surface on an anchor resting flat on the lake bed. The U20 is a water level/water temperature logger, so records the change in the water depth over the period of record. The water level is calibrated and corrected using the barometric pressure record from the nearest terrestrial met station. This is done in the Onset Hoboware software. All sensor specifications are shown below. 
 In April, a 10" diameter hole is augured through the ice and the instrument string is lowered to the lake bottom with the buoy sitting on the surface of the ice. It should be noted that there is often some movement of the floats that get entrained by the moving ice slab in spring or by strong wave activity in summer.
 All loggers record hourly measurements on the hour using Alaska Standard Time (AST). In each data file, column headings are Time_AST, LakeDepth_m, TempBed_C (at corresponding lake depth), and TempSurface_C. Prior to deployment all loggers were tested in a chamber circulating ethylene glycol at temperatures of 0, 5, 10, 15, 20 degrees C and calibration coefficients were determined from these test for each sensor. After sensor downloads, data records were corrected using these calibration models. Pressure transducer water level loggers were calibrated in a similar manner and corrected accordingly.
 In a few cases, additional sensor strings were deployed at a different location in the same lake. This typically occurred when the lake was especially deep (&gt;4 m), and was designed to obtain measurements of the entire water column. In these cases, an Onset Computer U23 water temperature logger was used. These data are shown as additional columns in the .csv files.
 Finally, there are also some stand alone files for a few select lakes ("focus lakes") that report time series of water quality including dissolved oxygen and conductivity. Loggers were manufactured by Onset Computer; Hobo U24-001 for conductivity and U26-001 for the dissolved oxygen (see specs in readme). These loggers were attached to the base of the instrument string described below for a few lakes. Loggers are deployed in August, recovered the following August, serviced, and redeployed. Measurements are collected hourly.
DOI: 10.18739/a2h41jn2p
title: Eastern: Lake water hourly time series (CircumArctic Lake Observation Network)(2017)

description: These folders contain .csv files of lake water temperature time series collected during the period April to August. Generally, a rope is attached to an anchor. The other end of the rope is attached to a float. An Onset computer U12-015 water temperature data logger is affixed to the rope 30 cm below the float. Another data logger (U20) is attached to the surface on an anchor resting flat on the lake bed. The U20 is a water level/water temperature logger, so records the change in the water depth over the period of record. The water level is calibrated and corrected using the barometric pressure record from the nearest terrestrial met station. This is done in the Onset Hoboware software.
DOI: 10.18739/a2cc0tt7f
title: Islands of Four Mountains Artifact Analysis, Aleutian Islands, Alaska, 2013

description: This international and interdisciplinary project investigated connections among geological, ecological, and human systems in the Islands of the Four Mountains, Aleutian Islands. Extending 1800 km between the North American and Asian continents, the Aleutian Islands divide the northern Pacific Ocean from the Bering Sea. Given their unique subpolar location, their genesis on a volcanically- and seismically-active plate boundary, and their gradual colonization by humans during the past 9000 years, the Aleutian Islands are an excellent natural archaeological laboratory for tracking past: (1) human ecology, (2) subarctic human-environmental reciprocal relationships and, (3) geological influences, sometimes catastrophic, on human society. Host to some of the world's most active volcanoes, the Four Mountains provided a superlative opportunity to assess the development of prehistoric human risk management of, and adaptations to, environmental instability (climate change, volcanic eruptions, earthquakes, tsunamis, sea level fluctuations) through deep time. Four Mountain prehistoric sites are highly significant in light of new geologic data indicating volcanic activity during human migration and societal development in the Aleutians. Extensive new radiocarbon, paleoenvironmental, and cultural data extracted from these sites yielded novel insights into North Pacific Rim regional interactions, Unangan coping mechanisms, changing subsistence, and adaptations during the prehistoric and European contact periods.

The primary research goals in the Four Mountains region was understanding: (1) how human cultures and behavior have been shaped by Holocene climatic, biotic and geologic change; and (2) how human cultures have used and impacted biotic environments. Researchers tested and documented: a) relationships of and interactions among human groups who peopled the Aleutians, b) long-term change in Holocene environments and consequent change in terrestrial and marine animal populations and diversity, much of which constituted human resources; c) human responses to shifts in the distribution, diversity, and abundance of resources and, d) human coping mechanisms and resilience in the face of potentially catastrophic climatic and geological forces.
DOI: 10.18739/a27m04133
title: Temperature and bio-geochemical data from Toolik Lake, Lake N2, Lake E1, Lake E5, and Lake E6, North Slope, Alaska

description: Lakes are abundant in the terrestrial arctic, extending over about one quarter of the territory. For approximately nine months of the year, the waters of arctic lakes are under ice. Despite the duration of the ice-covered period, few studies have addressed the limnology (biological, chemical, and physical features) of these lakes during winter and how conditions under ice affects the stratification of lakes during the summer. We aim to look at the full year cycle lake circulation in order to quantify the effects of hydrodynamics on nutrient and gas fluxes and place the results within the context of climate change in the Arctic. The goals of our study include: (1) quantifying physical and biogeochemical controls on under ice thermal structure and circulation, the flowpath of snow melt, and mixing during spring and fall (2) quantifying respiration rates in arctic lakes of differing morphology and on geological substrates (3) illustrating the linkages and feedbacks between these physical and biogeochemical processes. 
 Our research is being conducted in lakes studied by the Arctic Long Term Ecological Research (ARC LTER). The selected lakes are: Toolik Lake, Lake E1, Lake E5, Lake E6 and Lake N2. The Lakes range in size from 1 to 1500 hectares. 
 We measured temperature and bio-geochemical lake parameters in two different formats: time series, and profile data. Time series of water temperatures, specific conductance, pressure, and dissolved oxygen at several depths were obtained from a taut-line mooring in different seasons (summer and winter) across multiple years (between fall 2012 and fall 2016). We measured profiles of temperature and bio-geochemical lake parameters at the deepest site (and occasionally other sites) in all lakes during the same time coverage as the time series.
DOI: 10.15468/dl.cnu4b5
title: Occurrence Download

description: A dataset containing 12 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasGeospatialIssue is false",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 },
 "TaxonKey is one of (Nannoglottis macrocarpa Y.Ling & Y.L.Chen)"
 ]
}

 The dataset includes 12 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027745-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.18739/a23x83m2q
title: Micropulse lidar (MPL) measurements taken at Summit Station, Greenland, 2012

description: This data set contains measurements from a MicroPulse LIDAR (MPL) that is deployed at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. 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 US Department of Energy's Atmospheric Radiation Measurement (ARM) Program. Field operations support is provided by the National Science Foundation's Arctic Observing Network (AON) Program. Together these products will augment similar data sets that are produced at other locations across the Arctic.
DOI: 10.15468/dl.2k6fh6
title: Occurrence Download

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

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027746-241107131044228/datasets/export for details.
DOI: 10.15468/dl.xt32vh
title: Occurrence Download

description: A dataset containing 569 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is Long-term monitoring of the relative density in the Iberian lynx (Lynx pardinus) with track counts in Doñana National Park 2007-2022"
 ]
}

 The dataset includes 569 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027747-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.57967/hf/3566
title: cd45rb
DOI: 10.57967/hf/3606
title: cd45rb
DOI: 10.18739/a2057cs9r
title: Micropulse lidar (MPL) measurements taken at Summit Station, Greenland, 2013

description: This data set contains measurements from a MicroPulse LIDAR (MPL) that is deployed at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. 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 US Department of Energy's Atmospheric Radiation Measurement (ARM) Program. Field operations support is provided by the National Science Foundation's Arctic Observing Network (AON) Program. Together these products will augment similar data sets that are produced at other locations across the Arctic.
DOI: 10.18739/a2vd6p558
title: Micropulse lidar (MPL) measurements taken at Summit Station, Greenland, 2014

description: This data set contains measurements from a MicroPulse LIDAR (MPL) that is deployed at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. 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 US Department of Energy's Atmospheric Radiation Measurement (ARM) Program. Field operations support is provided by the National Science Foundation's Arctic Observing Network (AON) Program. Together these products will augment similar data sets that are produced at other locations across the Arctic.
DOI: 10.18739/a2qn5zc14
title: Micropulse lidar (MPL) measurements taken at Summit Station, Greenland, 2011

description: This data set contains measurements from a MicroPulse LIDAR (MPL) that is deployed at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. 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 US Department of Energy's Atmospheric Radiation Measurement (ARM) Program. Field operations support is provided by the National Science Foundation's Arctic Observing Network (AON) Program. Together these products will augment similar data sets that are produced at other locations across the Arctic.
DOI: 10.18739/a2kw57j7r
title: Radiosonde temperature and humidity profiles taken at Summit Station, Greenland, 2016

description: This data set contains profiles of temperature and humidity observed by Vaisala radiosondes that are launched nominally twice daily at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. These radiosonde measurements did not initially contain wind tracking information, but transitioned towards including wind tracking in one sonde per data starting in 7/2011, then moving to twice-daily wind sondes in 6/2014. The data are processed using the standard Vaisala processing software. Detailed information on these parameters and other aspects of the dataset are included in the netCDF header information for each file.
DOI: 10.18739/a2g44hr2f
title: Radiosonde temperature and humidity profiles taken at Summit Station, Greenland, 2015

description: This data set contains profiles of temperature and humidity observed by Vaisala radiosondes that are launched nominally twice daily at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. These radiosonde measurements did not initially contain wind tracking information, but transitioned towards including wind tracking in one sonde per data starting in 7/2011, then moving to twice-daily wind sondes in 6/2014. The data are processed using the standard Vaisala processing software. Detailed information on these parameters and other aspects of the dataset are included in the netCDF header information for each file.
DOI: 10.18739/a2bc3sx8p
title: Radiosonde temperature and humidity profiles taken at Summit Station, Greenland, 2013

description: This data set contains profiles of temperature and humidity observed by Vaisala radiosondes that are launched nominally twice daily at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. These radiosonde measurements did not initially contain wind tracking information, but transitioned towards including wind tracking in one sonde per data starting in 7/2011, then moving to twice-daily wind sondes in 6/2014. The data are processed using the standard Vaisala processing software. Detailed information on these parameters and other aspects of the dataset are included in the netCDF header information for each file.
DOI: 10.18739/a26q1sh6s
title: Radiosonde temperature and humidity profiles taken at Summit Station, Greenland, 2011

description: This data set contains profiles of temperature and humidity observed by Vaisala radiosondes that are launched nominally twice daily at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. These radiosonde measurements did not initially contain wind tracking information, but transitioned towards including wind tracking in one sonde per data starting in 7/2011, then moving to twice-daily wind sondes in 6/2014. The data are processed using the standard Vaisala processing software. Detailed information on these parameters and other aspects of the dataset are included in the netCDF header information for each file.
DOI: 10.18739/a22z12q3h
title: Radiosonde temperature and humidity profiles taken at Summit Station, Greenland, 2014

description: This data set contains profiles of temperature and humidity observed by Vaisala radiosondes that are launched nominally twice daily at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. These radiosonde measurements did not initially contain wind tracking information, but transitioned towards including wind tracking in one sonde per data starting in 7/2011, then moving to twice-daily wind sondes in 6/2014. The data are processed using the standard Vaisala processing software. Detailed information on these parameters and other aspects of the dataset are included in the netCDF header information for each file.
DOI: 10.18739/a2z60c29q
title: Water temperature, salinity, and others collected from autonomous underwater vehicle in Sarqardleq Fjord, West Greenland from 2012-07-18 to 2012-07-24

description: Measurements of near-ice ( less than 200 meters (m)) hydrography and near-terminus subglacial hydrology are lacking, due in large part to the difficulty in working at the margin of calving glaciers. Here we provide detailed hydrographic and bathymetric measurements collected with an autonomous underwater vehicle as close as 150m from the ice–ocean interface of the Saqqarliup sermia–Sarqardleq Fjord system, West Greenland. Analysis in combination with modeled and observed subglacial discharge locations and magnitudes, showed evidence of two main types of subsurface glacially modified water (GMW) with distinct properties and locations (Stevens et al., 2016, doi:10.5194/tc-10-417-2016). The near-ice observations and subglacial discharge routing indicate that runoff from this glacier occurs primarily at two discrete locations and gives rise to two distinct glacially modified waters. Furthermore, the location with the largest subglacial discharge is associated with the lighter, fresher glacially modified water mass, qualitatively consistent with results from an idealized plume model.
DOI: 10.15468/dl.jk3pg9
title: Occurrence Download

description: A dataset containing 4 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasGeospatialIssue is false",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 },
 "TaxonKey is one of (Nannoglottis ravida (C.Winkl.) Y.L.Chen)"
 ]
}

 The dataset includes 4 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027748-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.