Köppen's 30 Boxes vs. a Changing Planet

Every square kilometre has a climate nothing else quite shares, yet climatologists compress that vast list into a handful of archetypes. This episode digs into the two families of climate classification — genetic methods that sort by causes, and empiric methods like Köppen-Geiger that sort by effects — and asks whether the archetype is a real instrument or a convenient fiction. From Trewartha's fix for Köppen's fat mid-latitude group to Thornthwaite's soil water budget and the air-mass schemes that abandon averages entirely, we trace what each system throws away. Then we point the map at a changing climate: roughly 5% of global land has already moved to a different major Köppen class since 1901–1930, Hungary sits at 81% shifted, and the classification is structurally blind exactly where warming bites hardest. A taxonomy episode about what a class can and cannot tell you.

Key sources:

• Beck et al., *Scientific Data*, published 2023-10-23 . — https://www.nature.com/articles/s41597-023-02549-6

• IPCC AR6 WGI, Figure 1.18 . — https://www.ipcc.ch/report/ar6/wg1/figures/chapter-1/figure-1-18/

• IPCC-WG1 Atlas repo, reference regions v4 . — https://github.com/IPCC-WG1/Atlas/tree/main/reference-regions

Episode 6053 — myweirdprompts.com/n/6053 (permanent short link: myweirdprompts.com/985016)