Ground-penetrating radar profiles from King Col and Eclipse Icefield; Alaska 2016-2017

The overall project aimed to address the lack of sufficient understanding of late Holocene precipitation in the Northeast Pacific region using field measurements, remote sensing, and numerical reanalysis methods. The Eclipse Icefield is one of the largest icefields in the St. Elias Range and supplies ice to some of North America’s largest glaciers. The specific objectives of the project were to 1) develop bedrock topography maps of the surveyed sites, 2) determine surface velocities at all sites, 3) map near-surface spatial accumulation rate patterns, 4) trace internal isochrones at each site, 5) estimate ice deformation effects on layer thinning, 6) produce updated and corrected accumulation time series, and 7) compare corrected records from Mt. Hunter and St. Elias ice cores to evaluate spatial precipitation patterns over the past millennium. The purpose of this Ground-Penetrating Radar (GPR) data set was to 1) determine ice thickness at each site, 2) map snow and ice layer thickness and estimate deformation, 3) determine the location of internal isochrones.