A Complete Map of Greenland Ice Velocity Derived from Satellite Data Collected over 20 Years.

ABSTRACT: While numerous maps of Greenland ice flow velocity exist, most have gaps in coverage and/or accuracy is limited. We processed a large volume of synthetic aperture radar (SAR) and Landsat 8 imagery collected between 1995 and 2015 to produce a nearly complete map of ice flow velocity for Greenland at a far greater accuracy than most prior products. We evaluated the accuracy of this map by comparing it with a variety of measured and estimated velocities. For the slow-moving interior of the ice sheet, where estimates are determined from interferometric phase, the errors are ~2 m a^-1 or better. For coastal areas, where estimates are determined entirely from speckle- or feature-tracking methods, errors are 2-3 m a^-1, which is in good agreement with the estimated formal erro

SUBMITTER: Joughin I 

PROVIDER: S-EPMC6582972 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature