| Date | Text | |
|---|---|---|
22 Jun 1940
Wladimir Köppen |
death Wladimir Köppen Died 22 Jun 1940 at age 93 (born 25 Sep 1846). Wladimir (Peter) Köppen was a German meteorologist and climatologist best known for his delineation and mapping of the climatic regions of the world. He played a major role in the advancement of climatology and meteorology for more than 70 years. The climate classification system he developed remains popular because it uses easily obtained data (monthly mean temperatures and precipitation) and straightforward, objective criteria. He recognized five principal climate groups: (A) Humid tropical -winterless climates; (B) Dry - evaporation constantly exceed precipitation; (C) humid mid-latitude, mild winters; (D) humid mid-latitude, severe winters; and (E) Polar - summerless climates. |
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22 Jun 1940
Daniel Quillen |
birth Daniel Quillen Daniel Quillen (died 2011), American mathematician. |
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