A NUMERICAL EXPERIMENT FOR EFFECTS OF OZONE HEATING ON GENERAL CIRCULATION

An ozone conservation equation is added to the global nine-layer general circulationmodel to simulate the heating effect on the upper atmosphere due to the absorption of theultraviolet part of solar radiation by ozone and the changes of temperature, pressure andwind fields caused by ozone heating. The experiment shows that the heating rate by ozoneis much larger than that by other elements such as water vapour in stratosphere. Thetemperature distribution and strength of zonal wind in tropopause and above calculated withozone effect are much different from the results simulated without ozone. The ozone heatingaffects not only the zonal wind but also the meridional wind, so that the Walker Circulationand Hadley Cell are all changed accordingly. Besides, it can be seen that the influences ofozone on the meteorological elements are small in troposphere, while it still makes apparentlyresponse near the surface. Especially, it is much larger above the land than above the ocean.     

臭氧加热对大气环流影响的数值试验

本文在一个全球9层大气环流模式中,加入一个臭氧方程来模拟臭氧吸收太阳紫外辐射对高层大气的加热作用以及由此而引起的温、压、风场的变化。试验表明平流层臭氧加热率远大于其它要素,如水汽等引起的加热率。在考虑臭氧加热作用的情况下,计算出的对流层顶以上的温度分布和纬向风强度与不考虑臭氧作用的计算结果有明显差异。臭氧加热作用不仅影响纬向风,同时也影响经向风,因而使Walker环流和Hadley环流都发生相应的变化。试验还表明,臭氧层的存在对各气象要素场的影响在对流层中部已相当小,然而在近地面却还有明显的反应。特别是对陆地上影响比海洋上要强得多。