Winkler, Albert Julius

(1894–1989), scientist at the University of California at davis whose name (and that of Maynard amerine) is commonly associated with a particular method of climate classification involving heat summation whereby California was divided into five viticultural regions, Regions I (the coolest) to V (the warmest). He edited General Viticulture, published in 1962 and revised in 1974, which was for long considered the most comprehensive book on viticulture in the English language.