Mass changes of the Greenland and Antarctic ice sheets and shelves and contributions to sea-level rise: 1992-2002

  title={Mass changes of the Greenland and Antarctic ice sheets and shelves and contributions to sea-level rise: 1992-2002},
  author={H. Zwally and M. Giovinetto and J. Li and H. Cornejo and M. Beckley and A. Brenner and J. Saba and D. Yi},
  journal={Journal of Glaciology},
Changes in ice mass are estimated from elevation changes derived from 10.5 years (Greenland) and 9 years (Antarctica) of satellite radar altimetry data from the European Remote-sensing Satellites ERS-1 and -2. For the first time, the dH/dt values are adjusted for changes in surface elevation resulting from temperature-driven variations in the rate of firn compaction. The Greenland ice sheet is thinning at the margins (-42 � 2G t a -1 below the equilibrium-line altitude (ELA)) and growing inland… Expand
Decadal Mass Balance of the Greenland and Antarctic Ice Sheets from High Resolution Elevation Change Analysis of ERS-2 and Envisat Radar Altimetry Measurements
  • Yonghong Li, C. Davis
  • Geology, Computer Science
  • IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium
  • 2008
Estimation of decadal mass balance for the Greenland and Antarctic ice sheets from ERS-2 and ENVISat satellite radar altimeter data shows that moderate to slightly positive elevation change rates (ECRs) dominate the interior areas while large negative ECRs are observed for many coastal areas. Expand
Monitoring changes of the Antarctic Ice sheet by GRACE, ICESat and GNSS
Abstract In this study, we estimate the ice mass changes, the ice elevation changes and the vertical displacements in Antarctica based on analysis of multi-geodetic datasets that involve theExpand
Ice-sheet elevation changes caused by variations of the firn compaction rate induced by satellite-observed temperature variations (1982–2003)
Abstract Changes in the surface elevation of the Greenland and Antarctic ice sheets and ice shelves caused by variations in the rate of firn compaction are calculated with a time-dependent firnExpand
Using sea-level data to constrain the contribution of the Greenland ice sheet to contemporary and recent sea-level change
Due to the potentially wide-reaching impacts on climate and sea-level change of a declining Greenland Ice Sheet (GrIS), the mass balance of the past decade has caused concern that the ice sheet isExpand
Recent loss of floating ice and the consequent sea level contribution
We combine new and published satellite observations and the results of a coupled ice-ocean model to provide the first estimate of changes in the quantity of ice floating in the global oceans and theExpand
Mass gains of the Antarctic ice sheet exceed losses
During 2003 to 2008, the mass gain of the Antarctic ice sheet from snow accumulation exceeded the mass loss from ice discharge by 49 Gt/yr (2.5% of input), as derived from ICESat laser measurementsExpand
Greenland ice sheet mass balance: distribution of increased mass loss with climate warming; 2003–07 versus 1992–2002
Abstract We derive mass changes of the Greenland ice sheet (GIS) for 2003–07 from ICESat laser altimetry and compare them with results for 1992–2002 from ERS radar and airborne laser altimetry. TheExpand
Accelerated ice-sheet mass loss in Antarctica from 18-year satellite laser ranging measurements
Accurate estimate of the ice-sheet mass balance in Antarctic is very difficult due to complex ice sheet condition and sparse in situ measurements. In this paper, the low-degree gravity fieldExpand
Trends in Antarctic Ice Sheet Elevation and Mass
Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of timescales, owing to changes in snowfall and ice flow. Here, we disentangle these signals by combining 25 years ofExpand
Effect of Ice Shelf Changes on Ice Sheet Volume Change in the Amundsen Sea Embayment, West Antarctica
The thinning of theice shelf may result in the volume loss of the ice sheet, especially the thinning near the grounding line into which the glaciers flow, and the glacier buttressing ability of the fragmented ice shelf is weaker than that of unrifted or fractured large ice shelves. Expand


Sea-level changes at the LGM from ice-dynamic reconstructions of the Greenland and Antarctic ice sheets during the glacial cycles
Abstract New experiments were performed with three-dimensional thermomechanical models of the Greenland and Antarctic ice sheets to simulate their behaviour during the glacial cycles, to reconstructExpand
Recent Ice-Sheet Growth in the Interior of Greenland
A continuous data set of Greenland Ice Sheet altimeter height from European Remote Sensing satellites (ERS-1 and ERS-2), 1992 to 2003, has been analyzed and winter elevation changes are shown to be linked to the North Atlantic Oscillation. Expand
Modelling Antarctic and Greenland volume changes during the 20th and 21st centuries forced by GCM time slice integrations
Current and future volume changes of the Greenland and Antarctic ice sheets depend on modern mass balance changes and on the ice-dynamic response to the environmental forcing on time scales as farExpand
Inland thinning of the Amundsen Sea sector, West Antarctica
[1] Together with the Pine Island glacier (PIG), the Thwaites (TG) and Smith (SG) glaciers are the principal drainage systems of the Amundsen Sea (AS) sector of Western Antarctica. Here we useExpand
Accelerated ice discharge from the Antarctic Peninsula following the collapse of Larsen B ice shelf
acceleration exceeds 27 km 3 per year, and ice is thinning at rates of tens of meters per year. We attribute this abrupt evolution of the glaciers to the removal of the buttressing ice shelf. TheExpand
Motion of major ice-shelf fronts in Antarctica from slant-range analysis of radar altimeter data, 1978–98
Abstract Slant-range analysis of radar altimeter data from the Seasat, Geosat and European Remote-sensing Satellite (ERS-1 and -2) databases is used to determine barrier location at particular times,Expand
Glacier acceleration and thinning after ice shelf collapse in the Larsen B embayment, Antarctica
[1] Ice velocities derived from five Landsat 7 images acquired between January 2000 and February 2003 show a two- to six-fold increase in centerline speed of four glaciers flowing into theExpand
Temporal Geoid of a Rebounding Antarctica and Potential Measurement by the GRACE and GOCE Satellites
We model the present-day time-dependent gravity field of Antarctica driven by solid earth rebound response to deglaciation of a more extensive continental ice cover at Last Glacial Maximum (22–15 kyrExpand
Mass balance of higher-elevation parts of the Greenland ice sheet
Satellite radar and aircraft laser altimeter data and a volume budget comparison of total snow accumulation with total ice discharge give three independent estimates of the recent mass balance ofExpand
Greenland Ice Sheet: Increased coastal thinning
Repeated laser-altimeter surveys and modelled snowfall/summer melt show average ice loss from Greenland between 1997 and 2003 was 80 ± 12 km3 yr-1, compared to about 60 km3 yr -1 for 1993/4-1998/9.Expand