Ross Ice Shelf - Credit: NASA
Pine Island and Thwaites Glacier - Credit: NASA
Scientists using satellite data have now created the most detailed maps ever produced of the vast snow-covered Antarctic continent. The maps reveal unprecedented views of surface features that provide clues to how and why the continent’s massive ice sheets and glaciers are changing.
Researchers can now decipher the intricate history of ice movements in the just-released "Mosaic of Antarctica," which uses images from the Moderate Resolution Imaging Spectrometer onboard NASA’s Terra and Aqua satellites. The map is the result of a partnership between NASA’s Goddard Space Flight Center, Greenbelt, Md.; the University of Colorado’s National Snow and Ice Data Center (NSIDC), Boulder; and the University of New Hampshire, Durham.
A second map to be released early next year will provide the most complete and accurate topographical survey of the continent ever undertaken, with more than 65 million points surveyed from space by the Geoscience Laser Altimeter System orbiting on NASA’s Ice, Cloud and Land Elevation Satellite (ICESat). This "digital elevation model" produced at Goddard will be distributed by NSIDC in a format compatible with the Mosaic map.
Rob Gutro | EurekAlert!
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Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
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