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APEX Soil Temperature and Moisture Data from 2018-2020 Geophysical measurements and related field data were collected by the U.S. Geological Survey (USGS) at the Alaska Peatland Experiment (APEX) site in Interior Alaska from 2018 to 2020 to characterize subsurface thermal and hydrologic conditions along a permafrost thaw gradient. The APEX site is managed by the Bonanza Creek LTER (Long Term Ecological Research). In July 2018, soil temperature and moisture sensors were installed at six out of the nine instrument locations (APEX1, APEX2, APEX3, APEX4, APEX7, APEX9). Thermistors (PS103J2, US Sensor, Orange, CA, USA) were placed at depths of 5, 30, 60, 120, and 180 centimeters (cm) with three replicates. Three sites (APEX1, APEX4, APEX9) contained an additional single... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Bonanza Creek, Disturbance, Fairbanks North Star, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, soil moisture, soil temperature, Fewer tags APEX Thaw Depth Data from 2018-2019 Geophysical measurements and related field data were collected by the U.S. Geological Survey (USGS) at the Alaska Peatland Experiment (APEX) site in Interior Alaska from 2018 to 2020 to characterize subsurface thermal and hydrologic conditions along a permafrost thaw gradient. The APEX site is managed by the Bonanza Creek LTER (Long Term Ecological Research). Nine instrument sites were established in April 2018 and initially comprised a buried seismic station for continuous passive recording of the seismic wavefield, and seven of the nine sites were given a borehole for repeat nuclear magnetic resonance (NMR) logging. Between June 2018 and September 2019, measurements of active-layer thaw depth were regularly recorded... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Disturbance, Fairbanks North Star, All tags... GGGSC, Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, Fewer tags APEX Borehole Nuclear Magnetic Resonance (NMR) Data and Models from 2018-2020 Geophysical measurements and related field data were collected by the U.S. Geological Survey (USGS) at the Alaska Peatland Experiment (APEX) site in Interior Alaska from 2018 to 2020 to characterize subsurface thermal and hydrologic conditions along a permafrost thaw gradient. The APEX site is managed by the Bonanza Creek LTER (Long Term Ecological Research). Nine instrument sites were established in April 2018, seven of which were given a borehole approximately 2.3 meters (m) deep for repeat nuclear magnetic resonance (NMR) logging to quantify unfrozen water content and soil properties in the near surface. NMR data were collected from each borehole a total of ten times between April 2018 and October 2020, at a... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Borehole nuclear magnetic resonance, Disturbance, All tags... Fairbanks North Star, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, Fewer tags Permafrost characterization at the Alaska Peatland Experiment (APEX): Geophysical and related field data collected from 2018-2020 Geophysical measurements and related field data were collected by the U.S. Geological Survey (USGS) at the Alaska Peatland Experiment (APEX) site in Interior Alaska from 2018 to 2020 to characterize subsurface thermal and hydrologic conditions along a permafrost thaw gradient. The APEX site is managed by the Bonanza Creek LTER (Long Term Ecological Research). In April 2018, seven boreholes were emplaced to depths of 2.3-2.5 meters (m) to allow for repeat logging with downhole nuclear magnetic resonance (NMR) to quantify the spatial and temporal variations in unfrozen water content within active-layer and permafrost soils. NMR data were collected on ten separate occasions between April 2018 and October 2020. In June... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Borehole nuclear magnetic resonance, Disturbance, All tags... Electrical resistivity tomography, Fairbanks North Star, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), electrical resistivity imaging, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, soil moisture, soil temperature, Fewer tags APEX Electrical Resistivity Tomography (ERT) Data and Models from 2018 Geophysical measurements and related field data were collected by the U.S. Geological Survey (USGS) at the Alaska Peatland Experiment (APEX) site in Interior Alaska from 2018 to 2020 to characterize subsurface thermal and hydrologic conditions along a permafrost thaw gradient. The APEX site is managed by the Bonanza Creek LTER (Long Term Ecological Research). Nine instrument monitoring sites (APEX1-APEX9) were established in April 2018. To quantify permafrost and thaw zone characteristics along the instrumented gradient, electrical resistivity tomography (ERT) data were collected in August 2018 along four 82 meter (m)-long transects between select sites: APEX1-3, APEX5-3, APEX5-7, and APEX6-8. Data were collected... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Active layer thickness, Alaska, Bonanza Creek, Disturbance, Electrical resistivity tomography, All tags... Fairbanks North Star, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Hydrologic processes, Land Change Science Program, Permafrost, U.S. Geological Survey, USGS, electrical resistivity imaging, environment, field monitoring stations, geoscientificInformation, hydrologic processes, permafrost, Fewer tags