武汉上空钠原子层结构短期演化特征

Short Period Evolvemental Characteristics ofSodium Layers over Wuhan, China

对１９９６年３月１日～３日钠荧光散射雷达获得的观测数据进行了分析与处理，得到了武汉（３O°３２′Ｎ，１１４°２２′Ｅ）上空钠原子层结构的短期演化特征分布图，并对它作了初步分析。结果指出，武汉上空钠原子层结构具有显著的时空变化特点，钠原子数密度的变化在１ｈ之内可达５０％。

The mesospheric sodium data, observed from 1 March to 3 March 1996 in Wuhan(30°32′N, 1 14°22′E) by a lidar, have been analyzed, and the short period evolvement profile of distribution of Na atom density with the altitude have been obtained. The results show that the distributions ofNa atom density changes apparently. The variation of Na atoms density can reach 50% within onehour.