台风天气形势下的边界层湍流特征分析

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台风天气形势下的边界层湍流特征分析
台风天气形势下的边界层湍流特征分析
马龙061170047
指导老师:彭珍博士、讲师
南京大学大气科学学院南京,210093
摘要:本文以2006年第6号台风“派比安”为观测试验背景,获取了其在经过试验观测地点—茂名市电白县电城镇博贺海洋气象观测站的各要素变化资料,并以此湍流资料对台风天气形势下的边界层湍流特征进行分析。

结果表明:通过平均场分析,得知台风存在非对称结构,这种非对称结构对台风的运动会产生影响;各特征变量如摩擦速度、拖曳系数、湍强、脉动运动动能、动量通量、热量通量等在台风的不同阶段上的变化具有一定的规律性;某些特征变量两两之间存在着较强甚至十分强的正、负相关性,而且上述相关性在台风不同阶段上的差异可能很大。

关键词:台风;边界层;湍流特征;
Analysis on turbulence features in the boundary layer in the
typhoon weather situation
Ma Long 061170047
Supervisor: Doc. Peng Zhen
School of Atmospheric Sciences, Nanjing University, Nanjing, 210093
Abstract: In this paper, No.6 Typhoon in 2006, "Paibian" ,has been chosen to be the background for the observation test. Observed through experimental observation of its location - Maoming City Dianbai electric town bohe marine meteorological observation stations, the elements of change in information has been obtained, and this turbulence information has been used to analyze turbulence features on in the typhoon weather situation in the boundary layer. The results showed that: through the mean-field analysis, knowing that there is non-symmetrical structure of the typhoon, this non-symmetry structure can put influence on Typhoon movements; the characteristic variables such as friction velocity, drag coefficient, turbulence intensity, turbulent kinetic energy, momentum flux, heat flux and so on, can act on certain rules at different stages of the typhoon and other changes; some two of the features of variable exists comparatively strong or even very strong positive/negative correlation, and the difference of each correlation in different stages of the typhoon can be large.
Key Words:Typhoon; boundary layer; turbulence features
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