evidence: When glacial ice sheets melt, something counterintuitive happens to sea levels. Logic might suggest that nearby levels would rise, but instead they fall. Thousands of miles away, however, they do go up in a kind of seesaw effect. Why? The answer is that water disperses away owing to the loss of gravitational pull toward the ice sheet. [...] The new study uses newly released satellite data from a European marine-monitoring agency that captured more than 30 years of observations around the Greenland Ice Sheet and much of the ocean close to Greenland to capture rising and falling ocean levels from the fingerprint. [...] Coulson, an expert in modeling sea level change and crustal deformation associated with melting ice sheets and glaciers, was visiting family in the U.K. when the data sets hit her inbox. She immediately recognized the potential, she said.