| 塔克拉玛干沙漠腹地近地层春季铅直湍流的小波分析 |
| |
| 引用本文： | 缪启龙,温雅婷,段春锋.塔克拉玛干沙漠腹地近地层春季铅直湍流的小波分析[J].气象与减灾研究,2008,31(4):1-7. |
| |
| 作者姓名： | 缪启龙 温雅婷 段春锋 |
| |
| 作者单位： | 1. 南京信息工程大学江苏省气象灾害重点实验室,江苏,南京,210044
2. 南京信息工程大学江苏省气象灾害重点实验室,江苏,南京,210044;解放军理工大学气象学院军,事气象系,江苏,南京,211101 |
| |
| 基金项目： | 国家自然科学基金，江苏省汽车工程重点实验室开放基金 |
| |
| 摘 要： | 利用塔克拉玛干沙漠腹地近地层10m高度处快速响应探测系统的湍流资料，对春季晴天和沙尘暴天气下不同稳定层结的铅直湍流脉动进行小波变化及其方差分析，以期了解铅直湍流的尺度结构特征。结果表明，不稳定层结条件下，春季晴天近地层的铅直湍流脉动以12—17S的周期为主，最小周期为1-1．5s；春季沙尘暴时最主要的周期则为6-10s，最小周期为0．4—0．6s。沙尘暴时不稳定层结的湍流尺度总体上小于晴天，较小尺度波动振荡更加明显，湍流运动比晴天更加频繁。稳定层结条件下，春季晴天以10—16S的周期振荡为主，最小周期为1．3-1．8s；春季沙尘暴则以11—20s的周期振荡为主，最小周期为0．5—0．8s。晴天稳定层结时的铅直脉动比沙尘暴时周期小，小周期的湍流运动更明显一些，但周期更小的波动在沙尘暴天气时则多一些。
|
| 关 键 词： | 塔克拉玛干 沙漠腹地 近地层 湍流 小波分析. |
Wavelet Analysis on Vertical Turbulence of Surface Layer over Hinterland of Taklimakan Desert in Spring |
| |
| MIAO Qi-long,WEN Ya-ting,DUAN Chun-feng.Wavelet Analysis on Vertical Turbulence of Surface Layer over Hinterland of Taklimakan Desert in Spring[J].Meteorology and Disaster Reduction Research,2008,31(4):1-7. |
| |
| Authors: | MIAO Qi-long WEN Ya-ting DUAN Chun-feng |
| |
| Institution: | MIAO Qi-long , WEN Ya-ting , DUAN Chun-feng . Jiangsu Key Laboratory of Meteorological Disaster, NUIST, Nanjing, 210044, China 2. Institute of Meteorology, PLA University of Sconce and Technology, Nanjing, 211101, China |
| |
| Abstract: | The turbulence data at 10 m height in the hinterland of Taklimakan Desert are employed to analyze the wavelet and variance changes of the vertical turbulence to understand the turbulent structure characteristics under sunshine and sand storm conditions in spring. The results are as follows： under the unstable condition, the vertical pulsation peculiarity is primarily at the 12--17 s time scale, with the smallest time scale 1--1.5 s, while under the sand storm condition the main time scale is about 6--10 s, and the smallest is 0.4--0.6 s. In the sand storm day, the time scale of turbulence is smaller than that in the fine day as a whole, the smaller scale fluctuation vibration is more obvious, and the turbulent motion is more frequent. Under the stable condition, in the fine day the time scale is around 10--16 s primarily, the smallest time scale is 1.3--1.8 s, while daring the sand storm, the turbulence presents the 11--20 s time scale vibration, with the smallest time scale 0.5--0.8 s. In the fine day, the time scale of vertical turbulence is smaller than that in the stand storm day, and the smaller time scale turbulent motion is more frequent. |
| |
| Keywords: | Taklimakan Desert hinterland Surface layer Turbulence Wavelet analysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
