Floating ice shelves that encircle mainland Antarctica have been thinning in recent years, but the effect this has had on ice loss from the continent's interior has remained unclear.
Data has shown that in recent years, these floating ice shelves that surround the AIS are thinning—likely as a result of ocean warming or changes in ocean circulation. But while scientists have suspected that this thinning may be responsible for the observed ice loss from the AIS, the hypothesis has not been proven.
The team also used advanced ice-flow models and compared this data with the changes seen in the satellite images over the last quarter of a century. When the results were compared the scientists say they found"striking and robust" similarities in the pattern of ice flowing from the ice sheet into the ocean.
"One of the most important lessons from this study is that the impact is felt without any delay," Gudmundsson said."Generally, we distinguish between an instantaneous response or a delayed, transient response. Our study shows the thinning of the ice shelves results in a significant instantaneous response to ice flow and ongoing mass loss. This means that we are not protected against the impact of the Antarctic Ice Sheet on global sea levels by a long response time.
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