地球大气的长波辐射差额是大气中辐射能量转换的支出部分,是研究大气以及地球—大气系统辐射差额乃至热量平衡的一个重要方面,也是大气温度垂直分布和昼夜变化的重要因子,故对大气中的天气过程有一定的意义。以前关于辐射差额和热量平衡的研究多是着重于对半球范围和纬度平均状况的讨论。东亚地区,无论在地理位置方面还是在地形和气候方面,都具有自己独特的特点,因而其辐射差额和热量平衡不会同于北半球的纬度平均状况。

Based on the aerological climatical data at 34 stations for June and December dur-ing the period 1957 to 1962 and used Yamamoto's radiation chart, the distribution of the infrared radiation fluxs in the troposphere has been computed for a cloudless over East Asia. Besides, the outgoing radiation of the system "earths surface-troposphere" and the mean cooling in the troposphere are given out. It is shown that seasonal and space distribution of the infrared radiation flux is closely associated with monsoon action and topographical characteristics over this area.