When I was younger—albeit not by much—I applied my interests in geography, history, and politics to create maps of fictional places. I used knowledge of things like the Hadley cell and the Koppen climate classification system to figure where on the maps I drew people would be able to live in temperate climates and where nobody could live because it would be an arid desert. I also read encyclopedias growing up, so go figure.
But I never bothered to apply my amateurish interest in geography and climatology to Earth. Rather, to an alternate Earth. But Randall Munroe over at xkcd did take a “what if” about a rotated Earth’s surface and investigated what would be the results. Of course he is also not an expert and even after thousands of years of living on this planet, humanity has yet to figure out all the variables that determine climates. But he gave it a shot. And he explained how it works (in theory). The result is called Cassini.
Blue is cold; think Siberia. Green is temperate; think rain and trees and, well, green things. Yellow is arid; think deserts. Red is hurricane zones—appropriate for summer. Think, well, hurricanes.
Turns out Philadelphia would still be a great place to live. Just saying.
