The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO). CALIPSO, a joint mission between NASA and the French space agency, and Nasa’s CALIOP instrument, which provides high-resolution vertical profiles of aerosols and clouds.
Every night throughout the oceans, under the cover of darkness, countless small sea creatures swim from the ocean depths to feed near the surface, then descend out of sight again before daybreak. This vast animal migration—a critical part of Earth’s carbon cycle—has been observed for the first time on a global scale. Sea creatures—including copepods, squid, and krill—swim up at night to feed on phytoplankton. The principal reason for this migration is for some marine creatures to avoid detection by predators that would consume them near the surface in daylight. December 4, 2019.