Old Rocks
Diamond Member
This is from Oct. 2009. Complete with graphs on the site.
Accelerating ice loss from Antarctica and Greenland
Similarly, Antarctic ice mass loss is accelerating at a rate of 26 Gigatonnes/yr2. This is equivalent to an acceleration of sea level rise at the rate of 0.08 mm/yr2. Antarctic mass loss increased by 140% over the 9 year period. The combined contribution of Greenland and Antarctica to global sea level rise is accelerating at a rate of 56 gigatonnes/yr2 during April 2002–February 2009, which corresponds to an equivalent acceleration in sea level rise of 0.17 mm/yr2.
And the source for the short article;
Increasing rates of ice mass loss from the Greenland and Antarctic ice sheets revealed by GRACE
Increasing rates of ice mass loss from the Greenland and Antarctic ice sheets revealed by GRACE
Increasing rates of ice mass loss from the Greenland and Antarctic ice sheets revealed by GRACE
I. Velicogna
Department of Earth System Science, University of California, Irvine, California, USA
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
We use monthly measurements of time-variable gravity from the GRACE (Gravity Recovery and Climate Experiment) satellite gravity mission to determine the ice mass-loss for the Greenland and Antarctic Ice Sheets during the period between April 2002 and February 2009. We find that during this time period the mass loss of the ice sheets is not a constant, but accelerating with time, i.e., that the GRACE observations are better represented by a quadratic trend than by a linear one, implying that the ice sheets contribution to sea level becomes larger with time. In Greenland, the mass loss increased from 137 Gt/yr in 2002–2003 to 286 Gt/yr in 2007–2009, i.e., an acceleration of −30 ± 11 Gt/yr2 in 2002–2009. In Antarctica the mass loss increased from 104 Gt/yr in 2002–2006 to 246 Gt/yr in 2006–2009, i.e., an acceleration of −26 ± 14 Gt/yr2 in 2002–2009. The observed acceleration in ice sheet mass loss helps reconcile GRACE ice mass estimates obtained for different time periods.
Accelerating ice loss from Antarctica and Greenland
Similarly, Antarctic ice mass loss is accelerating at a rate of 26 Gigatonnes/yr2. This is equivalent to an acceleration of sea level rise at the rate of 0.08 mm/yr2. Antarctic mass loss increased by 140% over the 9 year period. The combined contribution of Greenland and Antarctica to global sea level rise is accelerating at a rate of 56 gigatonnes/yr2 during April 2002–February 2009, which corresponds to an equivalent acceleration in sea level rise of 0.17 mm/yr2.
And the source for the short article;
Increasing rates of ice mass loss from the Greenland and Antarctic ice sheets revealed by GRACE
Increasing rates of ice mass loss from the Greenland and Antarctic ice sheets revealed by GRACE
Increasing rates of ice mass loss from the Greenland and Antarctic ice sheets revealed by GRACE
I. Velicogna
Department of Earth System Science, University of California, Irvine, California, USA
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
We use monthly measurements of time-variable gravity from the GRACE (Gravity Recovery and Climate Experiment) satellite gravity mission to determine the ice mass-loss for the Greenland and Antarctic Ice Sheets during the period between April 2002 and February 2009. We find that during this time period the mass loss of the ice sheets is not a constant, but accelerating with time, i.e., that the GRACE observations are better represented by a quadratic trend than by a linear one, implying that the ice sheets contribution to sea level becomes larger with time. In Greenland, the mass loss increased from 137 Gt/yr in 2002–2003 to 286 Gt/yr in 2007–2009, i.e., an acceleration of −30 ± 11 Gt/yr2 in 2002–2009. In Antarctica the mass loss increased from 104 Gt/yr in 2002–2006 to 246 Gt/yr in 2006–2009, i.e., an acceleration of −26 ± 14 Gt/yr2 in 2002–2009. The observed acceleration in ice sheet mass loss helps reconcile GRACE ice mass estimates obtained for different time periods.
