埃尔尼诺期间热带低层大气的有效位能

AVAILABLE POTENTIAL ENERGY OF LOWERATMOSPHERE LAYER IN THE TROPICSDURING THE PERIOD OF EL NI(?)O

本文根据热带西太平洋调查资料,用APE方程的近似形式计算了热带低层大气的有效位能,分析了调查海域内赤道、165°E两条断面低层大气有效位能的分布特征。计算结果反映了埃尔尼诺期间热带低层大气热结构的物理状态。本文还分析了热带低层大气的温度层结曲线,指出热带大气也存在逆温层。这对深入研究热带大气热力结构打下了基础。文章表明,用APE方程近似形式计算大气有效位能是可行的,计算本身也是简便的。

Based on the data observed from the Tropical Western Pacific, this paper computes the available potential energy (APE) of the lower atmosphere layer in the tropics and analyses its distribution characteristics at two sections (the equatorial and 165°E) in the investigation region. The results of computation show the physical state of the thermal structure of the lower atmosphere layer in the tropics during the period of E1 Nino. An analysis is also made of the stratification curve of the lower tropical atmosphere and an inversion layer also existing in the tropical atmosphere is indicated. These findings lay a foundation for making a thorough study on the thermodynamic structure of the tropical atmosphere. It is shown that computing APE with the approximate form of APE equations is practicable and the computation is itself simple and convenient.