Version History:
Raw Ground Penetrating Radar Data on North American Glaciers

Current Citation:
O'Neel, S., McGrath, D., Wolken, G.J., Whorton, E.N., Candela, S.G., Sass, L.C., McNeil, C.J., Baker, E.H., Peitzsch, E.H., Fagre, D.B., Clark, A M., Florentine, C.E., Miller, Z.S., Christian, J.E., Christianson, K., Babcock, E.L., Loso, M.G., Arendt, A.A., Burgess, E.W., Gusmeroli, A., 2018, Raw ground penetrating radar data on North American Glaciers (ver 3.0, March 2022): U.S. Geological Survey data release, https://doi.org/10.5066/F7M043G7

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Version 1.0 posted online July 2015

Original Citation:
Candela, S.G., McGrath, D., McNeil, C.J., O'Neel, S., Sass, L.C., Wolken, G.J., Loso, M.G. 2015. 2013 Raw Ground Penetrating Radar Data on Alaska's glaciers: U.S. Geological Survey data release, https://doi.org/10.5066/F7M043G7

Inital data release
Overview:
Ground Penetrating Radar (GPR) data packages from seven glaciers collected in 2013:

Datasets:
Eklutna Glacier 2013
Eureka Glacier 2013
Gulkana Glacier 2013
Scott Glacier 2013
Taku Glacier 2013
Valdez Glacier 2013
Wolverine Glacier 2013
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Version 2.0 revised and reposted online July 2017

Changes in version 2.0

Overview:
Added data from 2014-2016 collection years to existing collection, and standardized in-situ data for glaciers in the 2013 release.
Added multiple glaciers to the dataset, including a full timeseries through 2016 at each, as available.
The 2013 data from Taku glacier has been merged with the Juneau Ice Field Glaciers series. Added 2012 data from the Upper Susitna Basin Glaciers.

Datasets added:
Eagle Glacier 2014
Eastern Chugach Glaciers 2014
Eklutna Glacier 2014-2016
Gilkey Glacier 2014
Juneau Ice Field Glaciers 2014-2015
Kenai Glaciers 2014
Lake George Glacier 2014
Lemon Creek Glacier 2016
Scott Glacier 2014-2015
Surprise Glacier 2014
Upper Susitna Basin Glaciers 2012-2015
Valdez Glacier 2014-2015
Wolverine Glacier 2014-2016

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Version 2.1 revised and reposted online September 2018

Changes in version 2.1

Overview:
Added data for Gulkana and Wolverine glaciers (2017), Sperry Glacier, Montana (2017, 2018) South Cascade Glacier, Washington (2017, 2018)
No data on Alaskan glaciers was collected by USGS in 2018

Datasets added:
South Cascade Glacier 2017-2018
Sperry Glacier 2017-2018
Wolverine Glacier 2017
Gulkana Glacier 2017
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Version 3.0 revised and reposted online March 2022

Changes in version 3.0

Datasets added:
Wolverine Glacier 2020
Lemon Creek Glacier 2017