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Getting ready to chart sea level

12 April 2019

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Records show that, on average, global sea level rose by 3.2 mm a year between 1993 and 2018, but hidden within this average is the fact that the rate of rise has been accelerating over the last few years. Taking measurements of the height of the sea surface is essential to monitoring this worrying trend – and the Copernicus Sentinel-6 mission is on the way to being ready to do just this.

The mission will be a constellation of two identical satellites that are launched sequentially.

Over the next decade, the Copernicus Sentinel-6A and then Sentinel-6B satellites will, importantly, take the role as reference missions, picking up the task of continuing the long-term record of sea-surface height measurements that have so far been supplied by the French–US Topex-Poseidon and Jason missions.

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Glaciers lose nine trillion tonnes of ice in half a century

8 April 2019

When we think of climate change, one of the first things to come to mind is melting polar ice. However, ice loss isn't just restricted to the polar regions. According to research published today, glaciers around the world have lost well over 9000 gigatonnes (nine trillion tonnes) of ice since 1961.

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