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Thu Jun 14, 2018, 03:13 AM

Rate of Antarctic ice melt triples since 2012, study finds


Rate of Antarctic ice melt triples since 2012, study finds

Around 3 trillion tons of Antarctic ice has melted in the past 25 years, according to a comprehensive study. Ice loss since 2012 has accelerated threefold, raising sea levels by 3 millimeters over a five-year period.

Date 14.06.2018
Author Chase Winter

The rate of ice loss in Antarctica has tripled since 2012, causing global sea levels to rise at their fastest rate in 25 years, a new study published by an international team of experts said Wednesday. Over the last quarter century, about 3 trillion tons of Antarctic ice melt made ocean levels rise by 7.6 millimeters (0.3 inches), according to the study published in the journal Nature. About two-fifths of that rise, or 3 millimeters, has occurred since 2012.

The study found that from 1992 to 2011, Antarctica lost about 83.8 billion tons (76 billion metric tons) of ice per year, causing an annual sea level rise of 0.2 millimeters. Between 2012 and 2017, ice loss per year tripled to 241.4 billion tons, amounting to a 0.6 millimeters sea level rise per year.

About 70 percent of melting occurred in West Antarctica, where ocean-induced melting resulted in 58.4 billion tons of ice loss per year in the 1990s and 175.3 billion tons a year since 2012. Part of West Antarctica "is in a state of collapse," said co-author Ian Joughin of the University of Washington.

Meanwhile, ice-shelf collapse in the Antarctic Peninsula led to the northern tip of the continent losing 27.6 billion tons of ice per year since the early 2000s. East Antarctica has remained relatively stable during the past 25 years. East Antarctica largely sits on land mass and is not subject to the same forces that are driving the melting process in West Antarctica and Antarctic Peninsula,

Scientists said much of the retreating ice shelf is caused by ocean-induced melting, when warmer water causes melting from the edges and below ice sheets.

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Reply Rate of Antarctic ice melt triples since 2012, study finds (Original post)
nitpicker Jun 2018 OP
nitpicker Jun 2018 #1

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