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  3. Permafrost characterization at the Alaska Peatland Experiment (APEX): Geophysical and related field data collected from 2018-2020
  4. APEX Borehole Nuclear Magnetic Resonance (NMR) Data and Models from 2018-2020

APEX Borehole Nuclear Magnetic Resonance (NMR) Data and Models from 2018-2020

Dates

Publication Date
Start Date
2018-04-05
End Date
2020-10-29

Citation

James, S.R, Minsley, B.J., Waldrop, M.P., McFarland, J.W., Manies, K.L., and Pastick, N.J., 2021, Permafrost characterization at the Alaska Peatland Experiment (APEX): Geophysical and related field data collected from 2018-2020: U.S. Geological Survey data release, https://doi.org/10.5066/P90M04ST.

Summary

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 nominal vertical interval [...]

Contacts

Point of Contact :
Stephanie R James
Originator :
Stephanie R James, Burke J Minsley, Mark P Waldrop, Jack W McFarland, Kristen L Manies, Neal J Pastick
Metadata Contact :
Stephanie R James, GS GGGSC DM Team
Publisher :
U.S. Geological Survey
USGS Mission Area :
Ecosystems
USGS Program :
Climate Research & Development Program
SDC Data Owner :
Geology, Geophysics, and Geochemistry Science Center
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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APEX_2018_2020_bNMR_DataModels.xml
Original FGDC Metadata
View 		37.22 KB application/fgdc+xml
APEX_2018_2020_bNMR_T2.csv
“T2 data” 		10.39 MB text/csv
APEX_2018_2020_bNMR_Data.csv
“Spin-echo decay data” 		62.04 MB text/csv
APEX_2018_2020_bNMR_Inverted_Models.csv
“Inverted models” 		159.02 KB text/csv
6.4 GB application/zip
6.4 GB application/zip
6.65 GB application/zip
5.68 GB application/zip
5.56 GB application/zip
7.73 GB application/zip
6.59 GB application/zip
6.59 GB application/zip
7.41 GB application/zip
6.71 GB application/zip
bNMR_Inverted_Models_data_dictionary.csv 779 Bytes text/csv
bNMR_T2_data_dictionary.csv 540 Bytes text/csv
bNMR_data_dictionary.csv 534 Bytes text/csv
Shapefile: APEX_2018_2020_NMR_SiteLocations.zip
APEX_2018_2020_NMR_SiteLocations.shx 156 Bytes
APEX_2018_2020_NMR_SiteLocations.shp 296 Bytes
APEX_2018_2020_NMR_SiteLocations.dbf 4.67 KB
APEX_2018_2020_NMR_SiteLocations.prj 145 Bytes
APEX_2018_2020_NMR_SiteLocations.cpg 10 Bytes

Purpose

These data were collected to characterize and monitor belowground changes in physical and thermal properties to better understand how ice and unfrozen water content influence permafrost thaw and soil carbon losses.

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