论层结和风场对小尺度扰动发展的非线性影响
ON THE EFFECTS OF STRATIFICATION AND PREVAILING WIND ON THE DEVELOPMENT OF SMALL SCALE DISTURBANCES
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摘要: 本文考虑了小尺度扰动发展时,扰动场和平均场(环境)间的非线性相互作用后,分析了大气层结和盛行风对扰动发展的影响。分析结果指出,在层结是中性或不稳定分布时,扰动总能够得到发展;在稳定层结的情况下,只要某一临界条件满足,扰动也能发展。一般来说,盛行风将抑制扰动的发展;但对某些类型的风速廓线,盛行风对扰动的发展也能起到积极的作用。Abstract: This paper deals with the non-linear interaction betweell the disturbances and the cnviroment in the small scale svstems and the effects of the stratification and the orevailing wind on the development of disturbances.It is shown that the disturbances always well devclope in an unstable or a neutual stratified atmosphere and mav also develope in a stable atmosphere under certain conditions,on the other hand,the prevailing wind generally prevents the development of disturbances,but with the exception of certain type of wind profile which has active effects on the growth of disturbances.
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