一个表示降水年内分配的新方法

本文提出一个表示降水年内分配的新概念,即降水集中指数。降水集中指数是指日均温稳定≥10℃期间平均每日雨量与全年平均每日降水量的比值。这种表示降水年内变化的方法在农业气候研究和自然地理研究中将证明是有用的。作者计算了美国中东部温带地区和我国华北、东北地区的降水集中指数。

A NEW METHOD TO EXPRESS THE DISTRIBUTION OF PRECIPITATION IN A YEAR

A new concept,the concentrate index of precipitation which is defined as a ratio of the average rainfall per day within the period of the daily temperature≥10℃ to the average precipitation per day in a year,has been put forward to express the seasonal distribution of precipitation.This method of studying Precipitation regime will be usefull in the researches of agroclimatology and physical geography.As an example,the author has calculated and mapped the concentrate index of precipitation over the central and eastern temperate area of the United States as well as the Northern and Northeastern China.