关键词: 积温, 美国中东部温带, 中国东部温带

Abstract: The accumulated temperature steadily above 10℃ in the central and east era temperate area of the United States of America has been calculated by using an empirical formula revised on the basis of the Conrad's formula. It has been found that, in the studied area of the United States, the accumulated temperature is generally higher than that in the similar latitude of the eastern temperate area of China.It is beyond a shadow of doubt that the ac-cunmulated. temperature in the former is at least not lower than that in the latter, This new discovery corrects a traditional viewpoint, which has been in fashion for a long lime among the geographers of China, that the heaf resource of the Eastern Asia is the richest in the same latitude zone of the world due to the summer monsoon. The higher accumulated temperature in the central and eastern temperate area of the U.S. is associated with the slight ly longer period with temperature steadily above 10℃ and the warmer mean monthly temperatures within this period except July. The hottest month in the year. The northern states west of the Croat Lakes have approximately equal accumulated temperatures with the Northeast of China in the same latitude.

Key words: Accumulated temperature, Central and eastern temperate area of the U.S.A., eastern tem- perate area of China