Figure 2 shows gravity measurements of land ice mass changes in Antarctica for the period April 2002 to February 2009 (Velicogna 2009). (skepticalscience.com)
Postscript: A grouping of 40 + scientists, including four of our Nature co-authors, participated in the NASA / ESA Ice Sheet Mass Balance Intercomparison project (IMBIE) in an attempt to understand the reasons for previously disparate ice mass change estimates. (skepticalscience.com)
IMBIE reported results for Greenland and Antarctic ice mass changes for the last two decades in Science (Nov 30, 2012). (skepticalscience.com)