Picking manual melt pond depths from ICESat-2 photon data plots
(a.k.a. "Science Humans vs. Science Machines")
We are working on comparing different algorithms that extract the depth of melt ponds on Amery ice shelf from ATL03 photon data (see images below). Because humans tend to be pretty talented at recognizing patterns in such unstructured data, we want to investigate how the algorithm estimates compare to where humans would draw the melt pond surface and bed in these data.
How YOU can help:
If you'd be willing to use about 10 minutes of your time to help us by connecting some dots on four plots below, we'd greatly appreciated that. It's a good short distraction, and the more estimates we get, the better the data!
All you need to do is run the cells in this notebook in sequence, and trace out the surface and lake bed with line segments by clicking on the plots that are generated. The results should look something along the lines of this:
NOTE: Sometimes there seems to be a second, flat return surface just about half a metre below the pond surface (see below). This is due to oversaturation and dead-time of the sensor. Such second returns are not an actual surface, and should be IGNORED!