Laser altimetry reveals complex pattern of Greenland Ice Sheet dynamics

• Published in: Proceedings of the National Academy of Sciences
• Main Authors: Csatho, Beata M., Schenk, Anton F., van der Veen, Cornelis J., Babonis, Gregory, Duncan, Kyle, Rezvanbehbahani, Soroush, van den Broeke, Michiel R., Simonsen, Sebastian B., Nagarajan, Sudhagar, van Angelen, Jan H.
• Format: Text
• Language: English
• Published: National Academy of Sciences 2014
• Subjects: Physical Sciences; Greenland; Ice Sheet
• Online Access: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4284527; http://www.ncbi.nlm.nih.gov/pubmed/25512537; https://doi.org/10.1073/pnas.1411680112

We present the first detailed reconstruction of surface elevation changes of the Greenland Ice Sheet from NASA’s laser altimetry data. Time series at nearly 100,000 locations allow the characterization of ice sheet changes at scales ranging from individual outlet glaciers to larger drainage basins and the entire ice sheet. Our record shows that continuing dynamic thinning provides a substantial contribution to Greenland mass loss. The large spatial and temporal variations of dynamic mass loss and widespread intermittent thinning indicate the complexity of ice sheet response to climate forcing, strongly enforcing the need for continued monitoring at high spatial resolution and for improving numerical ice sheet models.