text: It was first published by Russian German climatologist Wladimir KÃ ppen in 1884 , with several later modifications by KÃ ppen himself notably in 1918 and 1936 .
simplified: It was developed by Wladimir KÃ ppen , a German climatologist , around 1900 ( with several further modifications by himself , notably in 1918 and 1936 ) .