Proper noun
Koppen (plural Koppens)
A surname.
Climate Köppen climate types of Kentucky Located within the southeastern interior portion of North America, Kentucky has a climate that can best be described as a humid subtropical climate (Koppen Cfa). Source: Internet
Traveling westward, the climate transitions progressively toward a semi-arid zone (Koppen BSk) in the high plains of the Panhandle and other western areas from about Lawton westward, less frequently touched by southern moisture. Source: Internet
Mr. Koppen became upset and removed Mr. Sherman from the bed. Source: Internet