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  3. Frequency domain electromagnetic induction (FDEM) geophysical data collected near the Agashashok River in the Noatak National Preserve, AK

Frequency domain electromagnetic induction (FDEM) geophysical data collected near the Agashashok River in the Noatak National Preserve, AK

Dates

Publication Date
Time Period
2016-09-15

Citation

Terry, N.C., Briggs, M.A., and Koch, J., 2021, Frequency domain electromagnetic induction (FDEM) geophysical data collected near the Agashashok River in the Noatak National Preserve, AK, U.S. Geological Survey data release, https://doi.org/10.5066/P9OZL8M9.

Summary

Frequency domain electromagnetic induction (FDEM) data were collected in September 2016 near the Agashashok River and its tributaries, within the Noatak National Preserve near Kotzebue, AK to aid in local permafrost mapping. Data were collected with a GEM-2 instrument (1.6 m coil separation, Geophex, Ltd.); a broadband sensor that measures the bulk conductivity and magnetic susceptibility of the subsurface to approximately 5-10 meters depth. The instrument is hand carried by a single operator and data are collected at walking speeds.

Contacts

Point of Contact :
Neil C Terry
Originator :
Neil C Terry, Martin A Briggs, Joshua C Koch
Metadata Contact :
Neil C Terry
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
New York Water Science Center
USGS Mission Area :
Water Resources

Attached Files

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metadata_noatak_main.xml
Original FGDC Metadata
View 		32.75 KB application/fgdc+xml
noatak_thumb.png thumbnail 1.99 MB image/png
Processed_Data.zip 12.28 MB application/zip
Raw_Data.zip 6.39 MB application/zip
README.txt 1.07 KB text/plain

Purpose

Data were collected to aid in mapping depth to permafrost. The study area is situated in the Arctic-boreal transition zone, a region undergoing rapid landscape change associated with a warming climate and thawing permafrost. Therefore, the development of methods such as FDEM to quickly and remotely monitor changes in depth to permafrost over large areas are desirable. FDEM data can be processed and inverted to produce depth profiles of electrical conductivity that can be interpreted to indicate the spatial distribution of permafrost.
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Communities

  • USGS Data Release Products
  • USGS New York Water Science Center

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Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P9OZL8M9

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