cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a2s46h68q
title: Drivers and scale dependency of plant-fungal-bacterial community co-assembly across the Arctic (2005-2019)

description: Despite considerable attention to biodiversity patterns in the face of global change, it remains unknown whether the same ecological drivers shape patterns of diversity in prokaryotes versus eukaryotes and in microscopic, small and large organisms. Plants (large, eukaryotic), fungi (small, eukaryotic) and bacteria (microscopic, prokaryotic) interact intensively belowground and can reciprocally affect community compositions of the other kingdoms. Their combined interactions and activities comprise the nexus of ecosystem function in terrestrial biomes.
 This study examined the fundamental ecological drivers of community assembly (dispersal, environmental filtering, competition, facilitation, niche partitioning, neutral processes) of plant-fungal-bacterial (PFB) communities across hierarchical spatial and ecological scales in the Arctic. We used Illumina sequencing to analyze the fungal and bacterial communities from over 3500 soil samples collected at 11 sites along two latitudinal transects in North America and Eurasia. Each transect includes all five bioclimatic subzones and spans 1700 kilometers (km) North to South. Furthermore, we obtained plant community and environmental data from all sampling sites to address a series of hypotheses about the drivers of alpha and beta diversity as well as community composition separately and jointly across plants, fungi and bacteria. Here we present the assembled plant, fungal and environmental data sets.
 We sampled the plants, environments and soils in the field from 2005 to 2010, and analyses of soil fungi (all the molecular work and processing of sequences and bioinformatics) were conducted from 2013 to 2019, for a total range of 2005-2019.
DOI: 10.18739/a2ng4gs7w
title: Long-term (2000-2017) response of lake-bottom temperature to climate variation in two adjacent tundra lakes, western Arctic coast, Canada

description: Lakes are principal agents of disturbance to permafrost. Many Arctic lakes are well-mixed in summer, so lake-bottom temperature is associated with thaw-season climate. In winter, the thermal regimes of the atmosphere and lake-bottoms are distinct. Measurements of bottom temperatures on shallow near-shore terraces and in deep central pools at two tundra lakes show lake regime responses to climate variation. Annual mean temperatures have varied in 2000-17 between -5.7 and 2.8 Celsius (°C) for shallow terraces and 1.1 and 4.5 °C for deep pools, and between -11.5 and -8.4 °C in the air. R^2 for thawing degree-days at lake-bottom and in the air ranged between 0.83 and 0.91 at shallow sites, and up to 0.85 for deep sites. Using the four warmest and coldest years as an analogue for climate change - an adjustment that may occur this century - talik geometry may take millennia to reach equilibrium.
 These data are included in a proceedings paper under the same title and authors for the 2021 Regional Conference on Permafrost in Boulder, Colorado.
DOI: 10.15468/dl.sjudmr
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON ((35.58417 1.015, 35.58417 1.0125, 35.58333 1.0125, 35.58333 1.011667, 35.5825 1.011667, 35.5825 1.010833, 35.58167 1.010833, 35.58167 1.01, 35.58083 1.01, 35.58083 1.006667, 35.58167 1.006667, 35.58167 1.005833, 35.58083 1.005833, 35.58083 1.003333, 35.58 1.003333, 35.58 1.0025, 35.58083 1.0025, 35.58083 1.001667, 35.58167 1.001667, 35.58167 1.000833, 35.5825 1.000833, 35.5825 1, 35.58333 1, 35.58333 0.9991667, 35.58417 0.9991667, 35.58417 0.9983333, 35.585 0.9983333, 35.585 0.9975000000000001, 35.58583 0.9975000000000001, 35.58583 0.9966667, 35.5875 0.9966667, 35.5875 0.9983333, 35.58833 0.9983333, 35.58833 1, 35.58917 1, 35.58917 1.001667, 35.59 1.001667, 35.59 1.003333, 35.59083 1.003333, 35.59083 1.005833, 35.59167 1.005833, 35.59167 1.009167, 35.59083 1.009167, 35.59083 1.010833, 35.58917 1.010833, 35.58917 1.0125, 35.58833 1.0125, 35.58833 1.013333, 35.58667 1.013333, 35.58667 1.014167, 35.585 1.014167, 35.585 1.015, 35.58417 1.015))",
 "TaxonKey is Mammalia"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027832-241107131044228/datasets/export for details.
DOI: 10.18739/a2hq3s04n
title: Auxiliary files used in Weather Research and Forecasting (WRF) model output for Greenland melt season, 1986-2015, 1996-2005 and 2071-80

description: Summary
 This dataset contains high resolution (15 kilometers (km), 3 hours (h)) output from Polar Weather Research and Forecast (WRF) driven by European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA), Jun-Jul-Aug, 1986-2015. These simulations used the Greenland Ice Mapping Project (GIMP) 90 meters (m) digital elevation model (DEM) from The Ohio State University (Howat et al 2014) for ice sheet topography and the Bootstrap Sea Ice dataset (NSIDC-0079).
 Details
 These datasets are output from the regional forecast model Polar WRF (i.e., WRF-Advanced Research WRF (ARW) with polar modifications developed by the Polar Meteorology Group at The Ohio State University; Hines and Bromwich 2008; Skamarock et al 2008). Datasets are available as both original model output and as post-processed output, i.e, model output that has been processed into more user-friendly format with an National Center for Atmospheric Research (NCAR) Command Language (NCL) script. Post-processed files are also smaller after removing variables of lesser interest.
 This dataset contains auxiliary files used in WRF simulations: option/parameter/namelist files, postprocessing scripts, Network Common Data Form (netCDF) file metadata (model output and postprocesed), and other supporting files.
 Summary of Auxiliary Files
 See specific folders within the tar archive for detailed information and files.
 1. geogrid
 GEOGRID.TBL, modified GEOGRID.TBL.ARW to add new HGT_M entry for GIMP DEM.
 2. intermediate files: conversion code and scripts
 a. Community Earth System Model (CESM) (from netCDF)
 README_CESM.pdf describes the CESM files needed to provide variables that WRF requires to run (as WRF Preprocessing System (WPS) intermediate format) and outlines processing steps to perform the conversion from netCDF.
 b. sea ice (from binary)
 README_ Sea ice.pdf describes the processing needed to convert Bootstrap Sea Ice v2 binary files to WPS intermediate format.
 3. namelists
 a. WPS (geogrid/ungrib/metgrid)
 b. WRF (real/wrf)
 4. Postproc
 Script: wrfout_postproc.ncl
 Utility scripts: make_wrf_postproc, run_wrf_postproc, wrf_postproc
 List of variables: other/wrfout_postproc_metadata.txt
 5. Other
 metadata for WRF output files:
 wrfout_original_metadata.txt
 wrfout_postproc_metadata.txt
DOI: 10.15468/dl.265xhc
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Machine Observation, Human Observation)",
 "TaxonKey is one of (Helianthus annuus L., Cirsium andersonii (A.Gray) Petr.)",
 "Country is one of (United States of America, Mexico)",
 "Year 1989-1991"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027834-241107131044228/datasets/export for details.
DOI: 10.18739/a23f4kp1k
title: Carbon dioxide fluxes by the AmeriFlux network at the Imnavait Creek Watershed Tussock Tundra, Alaska site (US-ICt), 2007-2012

description: The research approach of the US Study of Environmental Arctic Change (SEARCH) program, created by Arctic Observatory Networks (AON), is to seek development and deployment of a pan-arctic observing system that will measure the full range of continuing changes now underway in the Arctic. This project focuses on simultaneous measurements of carbon, water, and energy fluxes of the terrestrial landscape at hourly, daily, seasonal, and multi-year time scales. These are major regulatory drivers of the Arctic system and form key linkages and feedbacks between the land surface, the atmosphere, and the oceans. There are three automated weather stations deployed at Imnavait Creek in support of the AON objectives: The Ridge Station, the Biocomplexity Station, and the Fen Station. These stations will provide a comprehensive description of the state of the regional Arctic system with respect to these variables, its overall regulation and controlling features, and its interaction with the global system. In the longer-term, this project will provide a legacy of data, a network of observing platforms, and a set of clear protocols for long-term observation and further analysis.
DOI: 10.15468/dl.m49hsj
title: Occurrence Download

description: A dataset containing 30 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 (Notoseris yakoensis (Jeffrey) N.Kilian)"
 ]
}

 The dataset includes 30 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027835-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.18739/a2zp3w160
title: Petermann Fjord Sediment Core Paleomagnetic Data (OD1507), 2016-2017

description: Paleomagnetic data collected on Petermann Fjord sediment cores, OD1507 04 Gravity Core (GC), 40 Trigger Core (TC), and 41GC, from the PETERMANN15 expedition of the Swedish Icebreaker Oden during 2016-2017. Data were collected on u-channel samples at the Oregon State University Paleo- and Environmental Magnetism Laboratory on a 2-G Enterprises u-channel optimized superconducting rock magnetometer. A Paleomagnetic Secular Variation (PSV) stack of the inclination and declination of the three cores was constructed and compared to the Western Hemisphere Arctic PSV template (WHAP18) to help constrain the chronology of the Petermann Fjord sediment cores. These data can also be used to study the Holocene geomagnetic history of the Arctic. Data are discussed and documented by Reilly et al. (2019).
 _Pmag_Data.csv files include Characteristic Remanent Magnetization (ChRM) declination and inclination, and Natural Remanent Magnetization (NRM) intensity before after sequential alternating field demagnetization. Missing data in the 'Edgeless Depth (cm)' column removes intervals with unreliable data near core edges. Missing data in the 'Clean Depth (cm)' column also removes intervals with unreliable data related to sediment disturbance or ice rafted debris.
 PetermannFjord-PSV-Stack_and_WHAP18-PSV-Stack.csv file includes the inclination and declination stack for the Petermann Fjord cores, 04GC, 40TC, and 41GC, and the inclination and declination for the WHAP18 Template.
 References:
 Reilly, B. T., Stoner, J. S., Mix, A. C., Walczak, M. H., Jennings, A., Jakobsson, M., et al. (2019). Holocene break-up and reestablishment of the Petermann Ice Tongue, Northwest Greenland. Quaternary Science Reviews, 218, 322–342. https://doi.org/10.1016/j.quascirev.2019.06.023
DOI: 10.18739/a2v11vm40
title: Carbon dioxide fluxes by the AmeriFlux network at the Imnavait Creek Watershed Wet Sedge Tundra, Alaska site (US-ICs), 2007-2012

description: Research topics are: 1) Seasonal variation of CO2, H2O and CH4 fluxes and the inter-annual differences in arctic landscapes; 2) Climatic effect on the arctic CO2, CH4 budget.
DOI: 10.18739/a2q814t1q
title: Carbon dioxide fluxes by the AmeriFlux network at the Imnavait Creek Watershed Heath Tundra, Alaska site (US-ICh), 2007-2012

description: The research approach of the US Study of Environmental Arctic Change (SEARCH) program, created by Arctic Observatory Networks (AON), is to seek development and deployment of a pan-arctic observing system that will measure the full range of continuing changes now underway in the Arctic. This project focuses on simultaneous measurements of carbon, water, and energy fluxes of the terrestrial landscape at hourly, daily, seasonal, and multi-year time scales. These are major regulatory drivers of the Arctic system and form key linkages and feedbacks between the land surface, the atmosphere, and the oceans. There are three automated weather stations deployed at Imnavait Creek in support of the AON objectives: The Ridge Station, the Biocomplexity Station, and the Fen Station. These stations will provide a comprehensive description of the state of the regional Arctic system with respect to these variables, its overall regulation and controlling features, and its interaction with the global system. In the longer-term, this project will provide a legacy of data, a network of observing platforms, and a set of clear protocols for long-term observation and further analysis.
DOI: 10.18739/a2kh0f06w
title: Carbon dioxide fluxes by the AmeriFlux network at the Eight Mile Lake Permafrost thaw gradient, Healy, Alaska site (US-EML), 2008-2015

description: Research topics are: 1) Seasonal variation of CO2, H2O and CH4 fluxes and the inter-annual differences in arctic landscapes; 2) Climatic effect on the arctic CO2, CH4 budget.
DOI: 10.18739/a2fq9q626
title: Carbon dioxide fluxes by the AmeriFlux network at the Barrow, Alaska site (US-Brw), 1998-2008

description: Research topics are: 1) Seasonal variation of CO2, H2O and CH4 fluxes and the inter-annual differences in arctic landscapes; 2) Climatic effect on the arctic CO2, CH4 budget.
DOI: 10.18739/a29z90c8t
title: Carbon dioxide fluxes by the AmeriFlux network at the Atqasuk, Alaska site (US-Atq), 1999-2007

description: 1) Seasonal variation of CO2, H2O and CH4 fluxes and the inter-annual differences in arctic landscapes; 2) Climatic effect on the arctic CO2, CH4 budget.
DOI: 10.18739/a26688k40
title: Carbon dioxide fluxes by the AmeriFlux network at the Quebec - Eastern Boreal, Mature Black Spruce site (CA-Qfo), 2003-2010

description: Measurements taken at: Quebec - Eastern Boreal, Mature Black Spruce
DOI: 10.18739/a22f7js0v
title: Carbon dioxide fluxes by the AmeriFlux network at the Saskatchewan - Western Boreal, Mature Jack Pine site (CA-Ojp), 1997-2011

description: Research topics are: 1) Seasonal variation of CO2, H2O and CH4 fluxes and the inter-annual differences in arctic landscapes; 2) Climatic effect on the arctic CO2, CH4 budget.
DOI: 10.18739/a2xs5jh92
title: Carbon dioxide fluxes by the AmeriFlux network at the Saskatchewan - Western Boreal, Mature Aspen site (CA-Oas), 1996-2011

description: Measurements taken at: Saskatchewan - Western Boreal, Mature Aspen
DOI: 10.18739/a2t14tq57
title: Autonomous phase-sensitive Radio-Echo Sounder (ApRES)-derived basal and surface melt rates for Petermann Gletscher Ice Shelf, Greenland, 2015 - 2017.

description: Melt rates along the ice base and surface in the central basal channel of Petermann Gletscher Ice Shelf, Greenland. Rates were derived from hourly soundings taken by an Autonomous phase-sensitive Radio-Echo Sounder (ApRES) located on the ice surface approximately 16 kilometers (km) seaward of the grounding line in the ice shelf's central basal channel. The long data set spans August 23, 2015 to May 01, 2017, reveals a large seasonal signal in both the surface and basal melt rate, and has been smoothed with a 2-day running median filter. The short data set spans August 23, 2015 to February 11, 2016, reveals fortnightly and tidal basal melt rate signals, and has not been filtered. These data were throughly analyzed in Washam et al. (2019) - Journal of Glaciology and Washam et al. (2020) - JGR: Oceans. Complimentary oceanographic vertical profiles (doi:10.18739/A2PC2T86B) and time series data (doi:10.18739/A22J6846K) were collected beneath the ice at this location. A sediment core was also collected at this location.
DOI: 10.18739/a2p843x00
title: Discrete water samples collected from the Conductivity-Temperature-Depth rosette at specific depths, Northern Bering Sea to Chukchi Sea, 2017

description: The Pacific sector of the Arctic Ocean is experiencing major reductions in seasonal sea ice extent and increases in sea surface temperatures. One of the key uncertainties in this region is how the marine ecosystem will respond to seasonal shifts in the timing of spring sea ice retreat and/or delays in fall sea ice formation. Variations in upper ocean water hydrography, planktonic production, pelagic-benthic coupling and sediment carbon cycling are all influenced by sea ice and temperature change. To more systematically track the broad biological response to sea ice retreat and associated environmental change, an international consortium of scientists have developed a coordinated Distributed Biological Observatory(DBO) that includes selected biological measurements at multiple trophic levels, along with satellite and mooring measurements. The DBO currently focuses on five regional biological "hotspot" locations along a latitudinal gradient that allows for consistent sampling and monitoring at five biologically productive locations across a latitudinal gradient: DBO 1 (SLIP)-south of St. Lawrence Island (SLI), DBO2 (Chirikov)-north of SLI, DBO3 (southern Chukchi Sea), DBO4-NE Chukchi Sea,and DBO5-Barrow Canyon.
DOI: 10.18739/a2s17st4h
title: Carbon dioxide fluxes by the AmeriFlux network at the Ontario - Groundhog River, Boreal Mixedwood Forest site (CA-Gro), 2003-2015

description: Dynamics of carbon dioxide, water, and energy fluxes and the associated meteorological drivers; assessment of the ecological character of the forest; examination of the use of remote sensing to model carbon dioxide exchange and the status of macronutrients in the canopy.
DOI: 10.18739/a2n873105
title: Net ecosystem exchange, ecosystem respiration, and gross ecosystem productivity within a wet sedge meadow near Thule Air Base, Greenland, 2013

description: net ecosystem exchange, ecosystem respiration, and calculated gross primary productivity within a wet sedge meadow near Thule Air Base, Greenland. Total of 21 plots. Plots consist of a collar for flux measurements 6" in diameter. Data set also includes important met data for predicting carbon flux (see also thule_met_2013.xls). LiCor 6400 with custom chamber. Data were collected every few days, weather permitting. Measurements consisted of a light measurement (net ecosystem exchange) followed by a dark measurement (ecosystem respiration) where the chamber was covered in dense shade cloth. Measurement was the change in CO2 in the chamber over a two minute period. NEE and ER were calculated from this change and adjusted for water vapor concentration in the chamber and exchange of air in the open system. GEP was calculated from NEE and ER. Convention in this data set is uptake of CO2 is a negative value, release of CO2 is a positive value. Flux values were matched to the nearest-in-time 5-min met station data. Surface temperature was measured with a thermocouple attached to the LiCor 6400. csv, comma-delimited text. Data columns are: day of year, plot number, hour, minute, second, fractional day of year, net ecosystem exchange (umol m-2 s-1), ecosystem respiration (umol m-2 s-1), gross ecosystem productivity (umol m-2 s-1), PAR from the sensor on the licor (umol m-2 s-1), temperature of the ground surface (C), incoming PAR (umol m-2 s-1), reflected PAR (umol m-2 s-1), albedo (%), air temperature (C), relative humidity (%), volumetric water content (%), saNDVI, and soil temperature (C). Data set contains all measurements, not processed for non-sensical values such as GEP &amp;amp;gt;0. See thule_met_2013.xls for information on met station data, and thule_flux_plot_ndvi_2013.csv for information on NDVI.
DOI: 10.18739/a2hh6c66d
title: Asynchrony in the timing of goose-vegetation interactions: implications for biogeochemical cycling in wet sedge tundra Tutakoke River, Yukon Delta NWR, Alaska, 2014-2016

description: Data were collected from a three-year manipulative experiment investigating the interacting effects of changes in plant phenology and timing of goose grazing on subarctic graminoid grazing lawns in the Yukon Delta NWR, Alaska, USA. 
 Terrestrial high-latitude ecosystems are experiencing dramatic increases in temperature, changes in precipitation, and advancement of the growing season with important implications for trophic interactions. Uncoupling of the temporal relationships between migratory animals and the phenology of the forage they rely on for energy, nutrition, and rearing of young is one of the most glaring consequences of these changes. Furthermore, herbivores in high latitudes are likely to mediate biogeochemical responses to climate change substantially altering ecosystem function. However, little is known about how changes in the synchrony of herbivore-vegetation interactions will influence biogeochemical cycles.
 This research was conducted in the Yukon-Kuskokwim (Y-K) Delta in western Alaska, where there is strong evidence that climate change is driving temporal decoupling of the evolved linkage between the phenology of plants and the timing of goose migration. There is an urgency to the research because: 1) some of the most rapid climate changes in the world are underway in Alaska, leaving migratory geese and the ecosystem processes they influence vulnerable to new conditions, and 2) with the rapid advancement of the growing season, migratory goose feeding ecology is lagging substantially, threatening an irreplaceable subsistence resource for Native communities.
 The overall research objective is to quantify how an advancing growing season and changes in the synchrony of vegetation-goose interactions alter the magnitudes and patterns of C and N cycling in the YK Delta. Our specific research questions addressed with an experiment were: 1) How does the timing of plant growth interact with goose arrival time to alter summer-long magnitudes of plant production, foliar chemistry, and N availability? and 2) How does the timing of plant growth interact with goose arrival time to alter summer-long magnitudes of net ecosystem CO2 exchange, gross ecosystem photosynthesis, and ecosystem respiration?
DOI: 10.18739/a2804xk99
title: Soil temperatures along a transect near Thule Air Base, Greenland, 2013

description: Soil temperatures at approximately 10 cm depth along a 55+ meter long transect near Thule Air Base, Greenland. The transect spans a gradient from wet tundra to polar semi-desert. iButton. IButtons installed in 2013 DOY166, removed DOY222 in 2012. Temperature collected ever four hours. Data processed to remove values when iButtons were not in soil and equalized with soil temperature. .csv, comma-delimited text. Data columns are: plot number, year, day of year, hour of day, minute of hour, fractional day of year, fractional year, temperature in C. Temperature resolution is 0.5 C
DOI: 10.18739/a24b2x57d
title: Normalized Difference Vegetation Index (NDVI) images of the 1999 growing season of the Toolik Lake Field station

description: This dataset contains Normalized Difference Vegetation Index (NDVI) images of the 1999 growing season of the Toolik Lake Field station to document differences in on study site in control and treatment plots. For more information, please see the readme file. NOTE: This dataset contains the data in EXCEL format.
DOI: 10.18739/a20k26c3n
title: Soil temperatures along a transect near Thule Air Base, Greenland, 2012

description: Soil temperatures at approximately 10 cm depth along a 55+ meter long transect near Thule Air Base, Greenland. The transect spans a gradient from wet tundra to polar semi-desert. iButton. IButtons installed in 2012 DOY158, removed DOY227 in 2012. Temperature collected ever four hours. Data processed to remove values when iButtons were not in soil and equalized with soil temperature. .csv, comma-delimited text. Data columns are: plot number, year, day of year, hour of day, minute of hour, fractional day of year, fractional year, temperature in C. Temperature resolution is 0.5 C