Ice loss from the Southern Patagonian Ice Field, South America, between 2000 and 2012

摘要: [1] A time-series composed of 156 ASTER derived Digital Elevation Models (DEMs) and a radar-penetration-bias corrected version the Shuttle Radar Topography Mission (SRTM) DEM is used to derive ice surface height volume changes at Southern Patagonian Ice Field (SPI) in southern South America. The observations, made between February 2000 March 2012, indicate that field rapidly losing many largest outlet glaciers, most cases thinning extends highest elevations field. Mass loss occurring rate −20.0 ± 1.2 Gt a−1, which, when summed with mass-loss adjacent Northern results combined −24.4 1.4 equivalent +0.067 0.004 mm a−1of sea level rise. Our decade-long mass rates are substantially higher than those during last three decades 20th century, but good agreement recent GRACE observations. estimate sensitive constraints applied amount thickening accumulation zone. New measurements continued will be required refine our estimates.