cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.18739/a2vq2sb3c
title: Basal water pressure measured in boreholes drilled to the bed of Western Greenland: 2014-2017

description: The gradient of the hydraulic potential field at the ice-bedrock interface beneath the Greenland Ice Sheet dictates the routing and energetics of subglacial water, thereby influencing drainage system characteristics and sliding dynamics. In the ablation zone of the GrIS, variable water pressure due to an active subglacial drainage system and basal topography with high relief potentially interact to drive unknown spatial patterns and temporal changes in the hydraulic potential field. Here we present a suite of water pressure measurements collected in boreholes at a site in western GrIS, collected from 2014 to 2017 as part of an NSF-funded study to investigate the partitioning of surface velocity in to sliding and deformational components, and the role of meltwater on ice dynamics. Borehole sites show consistently high pressures with small scale variability during the melt season. High pressure persists during the winter period in the single borehole for each over-winter records are measured.
DOI: 10.18739/a2qz22h90
title: In situ ice deformation from borehole inclinometry measurements in Western Greenland, 2015-16

description: In situ measurements of ice deformation advance understanding of ice dynamics on the Greenland ice sheet by revealing rheological characteristics of the ice column, providing critical targets for numerical ice sheet flow modeling, and quantifying rates of basal motion by partitioning deformational flow from measured surface velocity. Here, we present measurements of ice tilt in two orthogonal directions and azimuth through a vertical column extending from the ice surface to the bed at a site in western Greenland.
DOI: 10.18739/a2m61bq55
title: Hydroxyl (OH) airglow image data, Alaska, January 2012

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/a2gf0mx0j
title: Hydroxyl (OH) airglow image data, Alaska, March, 2012

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/a2bn9x374
title: Underway fCO2 measurement in the western Arctic Ocean CHINARE2014, 2014

description: This project continued a successful collaboration between U.S. and Chinese scientists to study the exchange of carbon dioxide between the atmosphere and the surface waters of the Arctic Ocean. It involves the collection of high resolution underway pCO2 (partial pressure of carbon dioxide) data during the Chinese Arctic Research Expedition (CHINARE) cruise in summer 2014. Together with historical data, the results will be used to constrain the variability of sea surface pCO2, air-to-sea CO2 flux, and their changes over time and to understand the underlying carbon cycling control mechanisms in the western Arctic Ocean. Ancillary data include sea surface temperature (SST), sea surface salinity (SSS), atmospheric pressure. The data processing was following the method described by Pierrot et al. (2009). Here, CO2 levels in both the surface water and atmosphere are reported as fCO2.
DOI: 10.18739/a2707wp4n
title: Underway fCO2 measurement in the western Arctic Ocean CHINARE2012, 2012

description: These data report the surface and atmospheric CO2 levels in the western Arctic Ocean during the Chinese Arctic Research Expedition cruise in summer 2012. Surface water fCO2 measurements was collected continuously through a high-resolution underway CO2 analyzer (General Oceanic, Inc.). Ancillary data include sea surface temperature (SST), sea surface salinity (SSS), atmospheric pressure. Key processes under investigation include the uptake of CO2 by newly exposed surface waters following sea ice melt, and the contribution of riverine DIC and DOC to the Arctic Ocean net carbon uptake. Each of these processes is projected to change in a warming Arctic. Understanding carbon fluxes and the mechanisms controlling them in the Arctic Ocean is a prerequisite for confident prediction of future changes and climate feedbacks. These high-resolution underway fCO2 data could be used to constrain air-sea fluxes of carbon dioxide and their spatial variability.
DOI: 10.18739/a23775w1c
title: Modèle Atmosphérique Régional (MAR) three-dimensional regional climate model (RCM), version 3.2, over Greenland, 1948-2016

description: We provide outputs of the Modèle Atmosphérique Régional (MAR) regional climate model (RCM) over Greenland including ice/snow surface properties, energy and mass fluxes at the surface, and atmospheric data. Data are provided in netCDF format. Descriptions of variables, including units and information about layered variables are provided within the netCDF files. The MAR, is a coupled land-atmosphere regional climate model featuring an atmospheric model described by Gallée and Shayes (1997), and the Soil Ice Snow Vegetation Atmosphere Transfer scheme surface model. The model setup used here is similar to that of Fettweis (2007), with modifications to the albedo scheme as noted by Fettweis et al. (2011). MAR has been run over Greenland and surrounding areas at a 25 km spatial resolution, forced at the lateral boundaries and ocean surface with data from the European Center for Medium-Range Weather Forecasts (ECMWF). MAR assigns surface elevation and an ice sheet mask based on the data of Bamber et al. (2013). MAR outputs provided here are from version 3.2 of the model. MAR has been validated against satellite and in situ data (e.g. Lefebre et al. 2005, Fettweis et al. 2011) and has been used in multiple studies to simulate ice-sheet and atmospheric parameters, such as surface mass balance, surface melt, and atmospheric circulation near Greenland (e.g. Fettweis et al., 2011, Tedesco et al., 2013, Franco et al., 2013).
 
 
 References:
 Bamber, J. L., Griggs, J.A., Hurkmans, R.T.W.L., Dowdeswell, J.A., Gogineni, S.P., Howat, I., Mouginot, J., Paden, J., Palmer, S., Rignot, E., Steinhage, D.: A new bed elevation dataset for Greenland, The Cryosphere, 7, 499-510, 2013.Fettweis, X.: Reconstruction of the 1979-2006 Greenland ice sheet surface mass balance using the regional climate model MAR, The Cryosphere, 1, 21-40, 2007.Fettweis, X., Tedesco, M., van den Broeke, M., and Ettema, J.: Melting trends over the Greenland ice sheet (1958-2009) from spaceborne microwave data and regional climate models, The Cryosphere, 5, 359-375, 2011.Franco, B., Fettweis, X., Lang, C., and Erpicum, M.: Impact of spatial resolution on the modelling of the Greenland ice sheet surface mass balance between 1990-2012, using the regional climate model MAR, The Cryosphere, 6, 695-711, 2012.Gallée, H., and Schayes, G.: Development of a three-dimensional meso-γ primitive equation model: katabatic winds simulation in the area of Terra Nova Bay, Antarctica, Mon. Wea. Rev., 122, 671-685, 1994.Lefebre, F., Fettweis, X., Gallée, H., van Ypersele, J.-P., Marbaix, P., Greuell, W., and Calanca, P.: Evaluation of a high-resolution regional climate model simulation over Greenland, Climate Dynamics, 25, 99-116, doi: 10.1007/s00382-005-0005-8, 2005.Tedesco, M., Fettweis, X., Mote, T., Wahr, J., Alexander, P., Box, J., Wouters, B.: Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data, The Cryosphere, 7, 615-630, 2013.
DOI: 10.15468/dl.nn6sua
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/0027741-241107131044228/datasets/export for details.
DOI: 10.18739/a2zg6g76s
title: Mooring Observations from the Atlantic Water Inflow Experiment (ATWAIN) from September 21, 2012 through September 19, 2013

description: The overall goal of this study is to obtain a quantitative description of the water mass composition, kinematics, and dynamics of the Atlantic water boundary current in the eastern Arctic Ocean over an annual cycle, in order to elucidate the role of the current in regulating the Arctic system. The project is part of a larger cooperative program entitled the Atlantic Water Inflow Experiment (ATWAIN), which is an international collaboration between six institutions: The Woods Hole Oceanographic Institution (WHOI), USA; the Institute for Marine Research in Bergen, Norway (IMR); the Norwegian Polar Institute (NPI); the University of Svalbard (UNIS); the University of Tromsø (UT); and the Institute of Oceanology Polish Academy of Sciences (IOPAS). The main goal of ATWAIN is to better understand how the Atlantic water spreads into the Arctic Ocean, including the manner in which it interacts with the pack-ice and how it is transformed within the Eurasian Basin. As part of our study, six moorings were deployed across the Atlantic water boundary current near 30E for a one-year period, from September 2012 to September 2013. WHOI provided the four offshore moorings in the array.
DOI: 10.18739/a2tq5rf2n
title: Mooring Observations from the Atlantic Water Inflow Experiment (ATWAIN) for mooring EA4 at 81.88882°N and 30.09648°E from September 21, 2012 through September 19, 2013

description: The overall goal of this study is to obtain a quantitative description of the water mass composition, kinematics, and dynamics of the Atlantic water boundary current in the eastern Arctic Ocean over an annual cycle, in order to elucidate the role of the current in regulating the Arctic system. The project is part of a larger cooperative program entitled the Atlantic Water Inflow Experiment (ATWAIN), which is an international collaboration between six institutions: The Woods Hole Oceanographic Institution (WHOI), USA; the Institute for Marine Research in Bergen, Norway (IMR); the Norwegian Polar Institute (NPI); the University of Svalbard (UNIS); the University of Tromsø (UT); and the Institute of Oceanology Polish Academy of Sciences (IOPAS). The main goal of ATWAIN is to better understand how the Atlantic water spreads into the Arctic Ocean, including the manner in which it interacts with the pack-ice and how it is transformed within the Eurasian Basin. As part of our study, six moorings were deployed across the Atlantic water boundary current near 30E for a one-year period, from September 2012 to September 2013. WHOI provided the four offshore moorings in the array.
DOI: 10.18739/a2pz51m88
title: Mooring Observations from the Atlantic Water Inflow Experiment (ATWAIN) for mooring EA1 at 81.63165°N and 30.6589°E from September 21, 2012 through September 19, 2013

description: The overall goal of this study is to obtain a quantitative description of the water mass composition, kinematics, and dynamics of the Atlantic water boundary current in the eastern Arctic Ocean over an annual cycle, in order to elucidate the role of the current in regulating the Arctic system. The project is part of a larger cooperative program entitled the Atlantic Water Inflow Experiment (ATWAIN), which is an international collaboration between six institutions: The Woods Hole Oceanographic Institution (WHOI), USA; the Institute for Marine Research in Bergen, Norway (IMR); the Norwegian Polar Institute (NPI); the University of Svalbard (UNIS); the University of Tromsø (UT); and the Institute of Oceanology Polish Academy of Sciences (IOPAS). The main goal of ATWAIN is to better understand how the Atlantic water spreads into the Arctic Ocean, including the manner in which it interacts with the pack-ice and how it is transformed within the Eurasian Basin. As part of our study, six moorings were deployed across the Atlantic water boundary current near 30E for a one-year period, from September 2012 to September 2013. WHOI provided the four offshore moorings in the array.
DOI: 10.18739/a2k649t3z
title: Mooring Observations from the Atlantic Water Inflow Experiment (ATWAIN) for mooring EA2 at 81.72033°N and 30.47067°E from September 21, 2012 through September 19, 2013

description: The overall goal of this study is to obtain a quantitative description of the water mass composition, kinematics, and dynamics of the Atlantic water boundary current in the eastern Arctic Ocean over an annual cycle, in order to elucidate the role of the current in regulating the Arctic system. The project is part of a larger cooperative program entitled the Atlantic Water Inflow Experiment (ATWAIN), which is an international collaboration between six institutions: The Woods Hole Oceanographic Institution (WHOI), USA; the Institute for Marine Research in Bergen, Norway (IMR); the Norwegian Polar Institute (NPI); the University of Svalbard (UNIS); the University of Tromsø (UT); and the Institute of Oceanology Polish Academy of Sciences (IOPAS). The main goal of ATWAIN is to better understand how the Atlantic water spreads into the Arctic Ocean, including the manner in which it interacts with the pack-ice and how it is transformed within the Eurasian Basin. As part of our study, six moorings were deployed across the Atlantic water boundary current near 30E for a one-year period, from September 2012 to September 2013. WHOI provided the four offshore moorings in the array.
DOI: 10.18739/a2ff3m10q
title: Mooring Observations from the Atlantic Water Inflow Experiment (ATWAIN) for mooring EA3 at 81.80053°N and 30.27498°E from September 21, 2012 through September 19, 2013

description: The overall goal of this study is to obtain a quantitative description of the water mass composition, kinematics, and dynamics of the Atlantic water boundary current in the eastern Arctic Ocean over an annual cycle, in order to elucidate the role of the current in regulating the Arctic system. The project is part of a larger cooperative program entitled the Atlantic Water Inflow Experiment (ATWAIN), which is an international collaboration between six institutions: The Woods Hole Oceanographic Institution (WHOI), USA; the Institute for Marine Research in Bergen, Norway (IMR); the Norwegian Polar Institute (NPI); the University of Svalbard (UNIS); the University of Tromsø (UT); and the Institute of Oceanology Polish Academy of Sciences (IOPAS). The main goal of ATWAIN is to better understand how the Atlantic water spreads into the Arctic Ocean, including the manner in which it interacts with the pack-ice and how it is transformed within the Eurasian Basin. As part of our study, six moorings were deployed across the Atlantic water boundary current near 30E for a one-year period, from September 2012 to September 2013. WHOI provided the four offshore moorings in the array.
DOI: 10.18739/a29s1kk98
title: Tutakoke Field Site Trace Gas fluxes

description: Trace gas fluxes of CH4 and N2O were collected approx. twice per week during the summer of 2015 from the Tutakoke Field Site on the coastal region of the Yukon Kuskokwim Delta in Western Alaska. Trace gas fluxes were measured using a Licor Infrared gas analyzer (for CO2) and a Picarro Model G2308 gas analyzer (for CH4 and N2O). Accompanying gas measurements are measurements of soil temperature, water table position, aboveground biomass, and percent vegetation cover.
DOI: 10.18739/a2610vs6x
title: The Carbon Balance of Arctic River Deltas: Tundra Fire as an Agent of System Change, 2015-2016

description: The summer of 2015 was an extraordinary year for fire in the Arctic, including in the Yukon-Kuskokwim Delta, presaging a future where tundra and boreal fire is far more common. Remarkably, the area burned in the YK Delta in 2015 exceeds the total area burned from 1940-2014 combined. The response of the YK Delta in the first year post-fire will set the stage for longer-term changes in delta carbon storage and transport among tundra, aquatic and marine systems, and to the atmosphere. Quantifying carbon export and understanding the immediate ecosystem response to fire is critical because long-term recovery is, to a considerable degree, dependent on short-term responses. A major question that this research will address is how fire influences the amount and form of carbon transported from delta ecosystems seasonally and in the first year following fire. Ultimately, these results will inform long-term trajectories of the vulnerability and fate of delta carbon pools. This research will significantly improve our understanding of the role of fire in the loss of both modern and ancient carbon from arctic river deltas, which contain &gt;10% of the Arctic’s massive permafrost carbon store.
 This funding will allow project scientists to engage with Alaska Native faculty and students in STEM-focused teacher training programs at the tribal college in Bethel, which will provide teachers with experience conducting research on climate change and arctic system science and the opportunity to develop curriculum focused on climate change and the feedbacks that result from fire and other changes in ecosystems in the Yukon River Delta. This project will also improve the infrastructure for arctic research and teaching at a small Undergraduate Institution in central Minnesota.
 Arctic river deltas are hotspots for carbon storage, occupying &lt;1% of the pan-Arctic watershed but containing &gt;10% of carbon stored in arctic permafrost. They are also heterogeneous mosaics of linked terrestrial and aquatic ecosystems, and are susceptible to changes in land, river, and marine systems. The vulnerability of carbon stored in arctic river deltas is a major unknown and is critically important as climate warming and increasing fire frequency may make this carbon vulnerable to transport to aquatic and marine systems and to the atmosphere. The goal of this proposal is to examine the immediate effects of fire on carbon storage in the Yukon-Kuskokwim Delta and exchange between terrestrial and aquatic components of the Delta. By extension this work will yield critical insights into how the carbon balance of deltas in the arctic system will change over the coming decades as warming continues and fire frequency increases.
DOI: 10.18739/a2280502k
title: Spatial and Temporal Influences of Thermokarst Failures on Surface Processes in Arctic Landscapes

description: Recent summaries of international research clearly document the past and future extent of climate warming in the Arctic. These summaries suggest that in the future, rising temperatures will be accompanied by increased precipitation, mostly as rain: 20% more over the Arctic as a whole and up to 30% more in coastal areas during the winter and autumn. These climate changes will have important impacts on Arctic Systems. Of direct interest to this research is the likelihood that warming will promote permafrost degradation and thaw. Formerly frozen soils may be further destabilized by increased precipitation, leading to hillslope thermokarst failures. Recent work has documented that thermokarst failures are abundant and appear to have become more numerous around Toolik Lake on the eastern North Slope and in the western Noatak River basin in Alaska. A widespread and long-term increase in the incidence of thermokarst failures may have important impacts on the structure and function of arctic headwater landscapes. This research will use a systems approach to address hypotheses about how thermokarst failures influence the structure and function of the arctic landscape. It will focus on the composition of vegetation, the distribution and processing of soil nutrients, and exports of sediments and nutrients to stream and lake ecosystems. Results obtained at this hillslope scale will be linked to patterns observed at the landscape scale to test hypotheses about the spatial distribution of thermokarst failures in the arctic foothills. It is important to understand these interactions because perhaps the greatest potential impacts of changing land surface processes and formation of thermokarst failures are feedbacks to the climate system through energy, albedo, water, and trace gas exchange. This research is designed to quantify linkages among climatology, hillslope hydrology, geomorphology, geocryology, community ecology of vegetation, soil nutrient dynamics, microbial ecology, trace gas dynamics, and aquatic ecology. It will employ a combination of field experimentation, remote sensing, and simulation modeling as a means to quantify these relationships.
DOI: 10.18739/a2sq8qj2d
title: thule_plot_flux_2013.csv

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 &gt;0. See thule_met_2013.xls for information on met station data, and thule_flux_plot_ndvi_2013.csv for information on NDVI.