Over 40 percent of Antarctica ice shelves melted in 25 years

Scientists estimate nearly 67 trillion tonnes of ice have melted and merged with the ocean waters in the last 25 years.

Scientists estimated nearly 67 trillion tonnes of ice have melted and merged with the ocean waters in the last 25 years. This was counteracted by 59 trillion tonnes of ice being added to the ice shelves, resulting in a net loss of 7.5 trillion tonnes. As a landmark 50 times the size of the UK, Antarctica's surrounding oceans experience different currents. For instance, the western side of the water moves in a different direction compared to the eastern side.

The team studied over 100,000 satellite radar images to estimate the ice shelf loss in Antarctica. The data was collected from mainly CryoSat-2 and Sentinel-1 satellites. CryoSat-2 was the first of the European Space Agency Explorer mission satellites dedicated to monitoring the Earth’s polar ice sheets and glaciers.

The consequences of melting ice shelves could be disastrous for the ice system in the continent and global circulation, the study warned. It could negatively impact the giant “conveyor belt" in oceans, moving nutrients, heat, and carbon vital for polar ecosystems, sustaining marine life, and climate balance.

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