82-92km高度范围大气湍流能量耗散率的一个个例研究

A CASE STUDY OF TURBULENT ENERGY DISSIPATION RATES IN THE RANGE FROM 82 TO 92 km

使用Chaff和落球火箭测量的垂直速度和温度数据研究湍流结构和它的产生．结果表明湍流存在多层桔构．在强湍流层，动力不稳定，和MST雷达回波功率间有好的相关，认为强湍流层和雷达回波与动力不稳定有关．水平速度垂直波数谱表明，观测谱与他和谱模式有极好的一致，认为强湍流层和雷达回波通过动力不稳定直接与重力波饱和相联系．

Vertical velocity and temPerature data observed from Chaf and Faling SPhererocketS are used to study the strUcture and generah0n 0f tUrbulence. ResultS indicatethat a mulh - layered turbulent statllre is observed. G0od cormlation is foundbetween the strong turbulent layer, dyndrical instability and radar echo power,suggeshng that the str0ng tuthulent lnyer and echo power are relared to the dynamicalinstability.Vertical wavenumber sPectrUm of h0rizonta wind indicares tha there is anexcellent agreement with the saturated spectral model, suggeshng that the strongturbulent layer and radar echo power are linked directly to the saturation of gravitywave motions via dynamical instability.