期刊
SCIENCE ADVANCES
卷 5, 期 1, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aau3433
关键词
-
资金
- Cryosphere Program of NASA [17-CRYO17-0025, 80NSSC18M0083, NNX17AI02G]
- NSF [F0691-04]
The glaciers flowing into the Amundsen Sea Embayment, West Antarctica, have undergone acceleration and grounding line retreat over the past few decades that may yield an irreversible mass loss. Using a constellation of satellites, we detect the evolution of ice velocity, ice thinning, and grounding line retreat of Thwaites Glacier from 1992 to 2017. The results reveal a complex pattern of retreat and icemelt, with sectors retreating at 0.8 km/year and floating icemelting at 200m/year, while others retreat at 0.3 km/year with icemelting 10 times slower. We interpret the results in terms of buoyancy/slope-driven seawater intrusion along preferential channels at tidal frequencies leading to more efficient melt in newly formed cavities. Such complexities in ice-ocean interaction are not currently represented in coupled ice sheet/ocean models.
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