NASA's Walt Meir uses satellites to study sea ice. But like many modelers and remote sensing researchers, he had never stepped foot on this remote polar icescape. In spring 2016, Meir joined other satellite remote sensing scientists, sea ice modelers, and field researchers in Barrow, Alaska. Read more
Many National Parks were created to protect forests and ecosystems from development and fragmentation. But changes in temperature, rainfall, and atmospheric concentrations of carbon dioxide could eventually do as much to remake forests as humans did with saws and fires and bulldozers. Read more
For a decade, the CloudSat and CALIPSO satellites have used radar and lidar to “slice” through clouds and plumes of atmospheric particles to gain a better understanding of the vertical structures of the ephemeral features. Read more
The concentration of methane in the atmosphere has been fluctuating, mostly rising. The question is why. Scientists wonder if they have the right monitoring systems in place to answer that question adequately. Read more
The Arctic Boreal Vulnerability Experiment (ABoVE) is a multi-year field campaign in Alaska and western Canada, involving dozens of research teams. ABoVE researchers are investigating the vulnerability and resilience of ecosystems (such as permafrost, forests, and coastlines) and society to this changing environment. Read more
Satellite images showing how our world— forests, oceans,
cities, even the Sun— has changed in recent decades.
The night side of Earth twinkles with light in these composite global and regional views.