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. Jay Zwally and M. Giovinetto and Jun Li and Helen G. Cornejo and Matthew Beckley and Anita C. Brenner and Jack L. Saba and Donghui 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… 

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 LiC. Davis
  • Environmental Science, Mathematics
    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.

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 the

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 firn

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 is

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 measurements

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. The

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 field

Trends in Antarctic Ice Sheet Elevation and Mass

Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of time scales, owing to changes in snowfall and ice flow. Here we disentangle these signals by combining 25 years of

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.



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.

Accelerated ice discharge from the Antarctic Peninsula following the collapse of Larsen B ice shelf

Interferometric synthetic‐aperture radar data collected by ERS‐1/2 and Radarsat‐1 satellites show that Antarctic Peninsula glaciers sped up significantly following the collapse of Larsen B ice shelf

First point measurements of ice-sheet thickness change in Antarctica

Ice-sheet thickening or thinning rates in Antarctica are measured using the “coffee-can” or “submergence velocity” method. in this, repeated measurements of the positions of firn anchors are obtained

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,

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 kyr

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 of

Snowfall-Driven Growth in East Antarctic Ice Sheet Mitigates Recent Sea-Level Rise

Satellite radar altimetry measurements indicate that the East Antarctic ice-sheet interior north of 81.6°S increased in mass by 45 ± 7 billion metric tons per year from 1992 to 2003, enough to slow sea-level rise by 0.12 ± 0.02 millimeters per year.

Glacier acceleration and thinning after ice shelf collapse in the Larsen B embayment, Antarctica

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 the now‐collapsed