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"Alarmingly, analysis of the new images indicates that the rate of Thwaites’ retreat that scientists have documented more recently is small compared to the fastest rates of change in its past."
So what's the deal?
"at some point in the last 200 years, over less than six months, the front of the glacier lost contact with a seabed ridge and retreated at a rate of more than 2.1 kilometres per year (1.3 miles per year) – twice the rate documented using satellites between 2011 and 2019.
That explains why the glacier retreated faster for a period of time in the recent past.
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