Measuring Snow (image) University of Washington Caption UW graduate student Melinda Webster uses a probe to measure snow depth and verify NASA airborne data. She is walking on sea ice near Barrow, Alaska, in March 2012. Her backpack holds electronics that power the probe and record the data. Credit Chris Linder / Univ. of Washington Usage Restrictions With credit Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.