Final published version
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Trends in Antarctic Ice Sheet Elevation and Mass
AU - Shepherd, Andrew
AU - Gilbert, Lin
AU - Muir, Alan
AU - Konrad, Hannes
AU - McMillan, Mal
AU - Slater, Thomas
AU - Briggs, Kate
AU - Sundal, Aud V.
AU - Hogg, Anna E.
AU - Engdahl, Marcus
PY - 2019/7/28
Y1 - 2019/7/28
N2 - 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 of satellite radar altimeter observations and a regional climate model. From these measurements, patterns of change that are strongly associated with glaciological events emerge. While the majority of the ice sheet has remained stable, 24% of West Antarctica is now in a state of dynamical imbalance. Thinning of the Pine Island and Thwaites glacier basins reaches 122 m in places, and their rates of ice loss are now five times greater than at the start of our survey. By partitioning elevation changes into areas of snow and ice variability, we estimate that East and West Antarctica have contributed ‐1.1±0.4 and +5.7±0.8 mm to global sea level between 1992 and 2017.
AB - 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 of satellite radar altimeter observations and a regional climate model. From these measurements, patterns of change that are strongly associated with glaciological events emerge. While the majority of the ice sheet has remained stable, 24% of West Antarctica is now in a state of dynamical imbalance. Thinning of the Pine Island and Thwaites glacier basins reaches 122 m in places, and their rates of ice loss are now five times greater than at the start of our survey. By partitioning elevation changes into areas of snow and ice variability, we estimate that East and West Antarctica have contributed ‐1.1±0.4 and +5.7±0.8 mm to global sea level between 1992 and 2017.
U2 - 10.1029/2019GL082182
DO - 10.1029/2019GL082182
M3 - Journal article
VL - 46
SP - 8174
EP - 8183
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 14
ER -