Such rates of Greenland ice loss were barely larger than the margin of error in their readings, making it difficult to discern any difference between a supposed loss curve on a graph from a straight line.
But as one of our great American educators once said, if you drew aline through all the valleys and all the peaks, that line would be drawn with an upward curve.
In addition to mastery of traditional calligraphy, the art of engraving requires a high degree of virtuosity, since the artist works on a tiny surface area where every curve, every thickness of line counts.