A new tool uses Landsat, a network of land-focused satellites, to derive how much sediment is in coastal zones on the basis of the light reflected from the water column. The tool relies on an algorithm developed by Wenxiu Teng as part of his doctoral research at the University of Massachusetts Amherst, where he studies remote sensing and geomorphology. Teng presented the initial findings, with co-authors Qian Yu, Brian Yellen, Erin Peck, Rim Cook, Jon Woodruff, and David Ralston (WHOI), on 12 December at AGU’s Annual Meeting 2024 in Washington, D.C.