Spatial and temporal Antarctic Ice Sheet mass trends, glacio-isostatic adjustment, and surface processes from a joint inversion of satellite altimeter, gravity, and GPS data.

ABSTRACT: We present spatiotemporal mass balance trends for the Antarctic Ice Sheet from a statistical inversion of satellite altimetry, gravimetry, and elastic-corrected GPS data for the period 2003-2013. Our method simultaneously determines annual trends in ice dynamics, surface mass balance anomalies, and a time-invariant solution for glacio-isostatic adjustment while remaining largely independent of forward models. We establish that over the period 2003-2013, Antarctica has been losing mass at a rate of -84 ± 22 Gt yr^-1, with a sustained negative mean trend of dynamic imbalance of -111 ± 13 Gt yr^-1. West Antarctica is the largest contributor with -112 ± 10 Gt yr^-1, mainly triggered by high thinning rates of glaciers draining into the Amundsen Sea Embayment. The A

SUBMITTER: Martin-Espanol A 

PROVIDER: S-EPMC4845667 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature