一次降水性冷锋的边界层谱特征及尺度分析

本文使用１９９４年１月１５日至１９日南京北郊二台洞梯度观测站１９９５年气象塔的实测资料，南京小教场的地面和探空资料。对９４年１月份发生的一次伴有大量降水的强冷锋的湍流谱及多尺度时间、空间分布进行了计算分析。

SPECTRAL CHARACTERISTIC AND MULTI-SCALE ANALYSIS OF A WET COLD FRONT IN BOUNDARY-LAYER ATMOSPHERE

In this paper, the behaviours of spectral and multi-scale of a wet (snow) cold frontwhich occurred during Jan. 15, 1994 and Jan- 19, 1994 are studied using the data from a tow-er of a .gradient observation station in north suburb of Nanjing as well as the ground andsounding data from xiaojiaochang, Nanjing. The spectral analysis shows the existence ofseveral meso-scale and micro-scale turbulent motions in the boundary. layer during the coldfront. In the inertial subrange, the spectra fall as n 5/3. But the laws of local isotropy are nolonger obeyed. The results of the multi-scale analysis conform well with those of spectralanalysis, which shows good coincidence and implementation of these two approches.