Are you wondering what on earth you’re looking at? Well you can bring your complaints to me because I actually made this plot the other week as part of my research. We are looking at data collected by an airborne radar survey (data provided by NASA Operation Ice Bridge). This image shows us a slice through the ice sheet, allowing us to see more than 4 km (2.5 miles) down below the surface. In fact, this image even shows a lake (yes unfrozen water!) below the ice sheet. This is called Lake Vostok and it is comparable in size to North America’s Lake Ontario yet completely hidden below the surface of the ice. Without imaging below the surface, we would never know that unfrozen lakes exist below ice sheets. Can you find the lake in the image.
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