Antarctica's melt quickens, risks metres of sea level rise


"During the entire period, the mass loss concentrated in areas closest to warm, salty, subsurface, circumpolar deep water (CDW), that is, consistent with enhanced polar westerlies pushing CDW toward Antarctica to melt its floating ice shelves, destabilize the glaciers and raise sea level", the study explained, also noting that the total ice mass loss has raised global ocean levels by 14 millimeters since 1979.

Global warming is melting ice in Antarctica faster than ever before -about six times more per year now than 40 years ago - leading to increasingly high sea levels worldwide, scientists warned Monday.

"As the Antarctic ice sheet continues to melt away, we expect multi-meter sea level rise from Antarctica in the coming centuries", he recently told Science Daily.

The PNAS study estimated that Antarctica lost 169 billion tonnes of ice from 1992-2017, above the 109 billion tonnes in the same period estimated past year by a large worldwide team of researchers. The project spanned four decades, during which the team examined 18 regions encompassing 176 basins, as well as surrounding islands.

"That's just the tip of the iceberg, so to speak", said Eric Rignot, a professor of Earth system science at the University of California, Irvine, who led other scientists in France, the Netherlands and the United States.

Cristiano Ronaldo será juzgado por fraude fiscal el martes 22 de enero
Se espera que concluya el mismo día y sea breve, y los funcionarios dicen que la audiencia solo requerirá que Ronaldo confirme que acepta el acuerdo.

"This region is probably more sensitive to climate than has traditionally been assumed, and that´s important to know, because it holds even more ice than West Antarctica and the Antarctic Peninsula together".

The gap was mainly because the PNAS study estimated that East Antarctica lost 57 billion tonnes over the period compared to a 5 billion tonne gain in last year's estimates.

"We're on a path where global sea level will rise about one metre by the end of this century, but we can not exclude that it's going to go beyond that", he said.

A new study reveals Antarctica is losing ice far more rapidly than previously thought, after satellite imagery showed the effects of warmer water on an area once believed to be stable.

Warming ocean water will only speed up ice loss in the future, and experts say sea levels will continue to mount for centuries, no matter what human do now to rein in climate change.