保护地球，探索宇宙，发现文明
Like distant galaxies amid clouds of interstellar dust, chunks of sea ice drift through graceful swirls of grease ice in the frigid waters of Foxe Basin near Baffin Island in the Canadian Arctic. Sea ice often begins as grease ice, a soupy slick of tiny ice crystals on the ocean’s surface. As the temperature drops, grease ice thickens and coalesces int...
Meltwater lakes form on the surface of Greenland’s Petermann Glacier, seen here in a June 2019 Landsat image. A new study finds that the number – and elevation – of meltwater lakes in Greenalnd is increasing. How do scientists know? Earth’s glaciers and ice sheets as seen from space – some spanning nearly 50 years – are providing scientists with new insights...