ESA and NASA satellites deliver first joint picture of Greenland Ice Sheet melting
Peer-Reviewed Publication
Updates every hour. Last Updated: 5-May-2025 08:09 ET (5-May-2025 12:09 GMT/UTC)
Scientists have delivered the first measurements of Greenland Ice Sheet thickness change using data from ESA and NASA ice satellite missions.
With global warming causing the Greenland Ice Sheet to melt and flow more rapidly, raising sea levels and disturbing weather patterns across our planet, precise measurements of its changing shape are of critical importance for tracking and adapting to the effects of climate warming.
CryoSat-2 and ICESat-2 – the ESA and NASA ice satellite missions – both carry altimeters as their primary sensor, but they make use of different technologies – radar and laser – to collect their measurements. The missions are therefore highly complementary, and combining their measurements has been a holy grail for polar science.
Fossilized skeletons and shells clearly show how evolution and extinction unfolded over the past half a billion years, but a new Virginia Tech analysis extends the chart of life to nearly 2 billion years ago. The chart shows the relative ups and downs in species counts, telling scientists about the origin, diversification, and extinction of ancient life. With this new study, the chart of life now includes life forms from the Proterozoic Eon, 2,500 million to 539 million years ago. Proterozoic life was generally smaller and squishier — like sea sponges that didn’t develop mineral skeletons — and left fewer traces to fossilize in the first place.
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