个体积云发展演变特性的一些研究

ON THE EVOLUTION OF INDIVIDUAL CUMULUS

中文摘要:

      本文先根据我国的观測事实,分析了个体积云发展演变的一些特性,并在理論上考虑了水滴对空气的拖带作用和水分相变(包括云外未飽和空气混合进云所引起的蒸发)的影响,假定个体积云为結构均匀的云块,由此計算了个体积云发展的层結条件和发展演变过程中的一些特性.計算結果指出,水滴拖带和水分相变作用对积云的发展条件很有影响;計算所得的个体积云发展演变特性与观測所得的結果也比較符合,可以对某些实际現象給以初步的理論解释.

英文摘要:

      In this paper, the evolution of individual cumulus is studied with basic equations involving the drag effect of drops and phase transformation of water(including the evaporation caused by entrainment). With individual cumulus being taken as a uniform cloudy parcel,.calculations are made for the thermal conditions and other properties in the prosess of evolution. It is shown that, the effects of drag and phase transformation on cloud development are important. The results are discussed and compared with the observations made in this country, and fair agreement is found in many aspects.