The use of small multiple images is one that allows you to look at changes in the individual images differently since the format of each image is the same. I love this collection of small multiples of global temperature because not only does it show changes in temperature over time (see how warm the earth is in the latest images at the bottom) but it also demonstrates how observations have changed over time, since in each image the area that did not have observations is masked out with gray. You can read more about this and get a closer look at https://www.climate-lab-book.ac.uk/2016/mapping-global-temperature-change/.
