Drivers of seasonal land-ice-flow variability in the Antarctic Peninsula ...
Land-ice flow in Antarctica has experienced multi-annual acceleration in response to increased rates of ice thinning, ice-shelf collapse and grounding-line retreat. Superimposed upon this trend, recent observations have revealed that land-ice flow in the Antarctic Peninsula exhibits seasonal velocit...
| Main Authors: | , , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
American Geophysical Union
2024
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.17863/cam.109207 https://www.repository.cam.ac.uk/handle/1810/369362 |
| Summary: | Land-ice flow in Antarctica has experienced multi-annual acceleration in response to increased rates of ice thinning, ice-shelf collapse and grounding-line retreat. Superimposed upon this trend, recent observations have revealed that land-ice flow in the Antarctic Peninsula exhibits seasonal velocity variability, with distinct summertime speed-ups. The mechanism, or mechanisms, responsible for driving this seasonality are unconstrained at present, yet detailed, process-based understanding of such forcing will be important for estimating accurately Antarctica’s future contributions to sea level. Here, we perform time-series analysis on an array of remotely-sensed, modelled and reanalysis datasets to examine the influence of potential drivers of ice-flow seasonality in the Antarctic Peninsula. We show that both meltwater presence and ocean temperature act as statistically significant precursors to summertime ice-flow acceleration, although each elicit an ice-velocity response after a distinct lag, with the ... |
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