激光雷达观测的武汉上空钠原子层形态特性

Characteristics of the Sodium Layers Observed by the Laser Radar in Wuhan

对１９９６年３月１日至３日钠荧光散射雷达获得的观测数据进行了分析与处理，得到了钠原子密度随高度的剖面分布和随时间的变化关系。分析结果指出，武汉上空中高层大气钠原子剖面具有强烈的时空变化特点。钠层主要分布在８０～１０５ｋｍ高度，钠层最大密度高度位于９２～９５ｋｍ范围，在不出现流星雨时。

In this paper, the mesospheric sodium data, observed from Mar. 1 to Mar. 3 1996 in Wuhan (30°32N, 114°22E) by a laser radar, have been analyzed, and the distribution of the Na atoms density with the altitude and the relation of the profiles of the Na atoms density with time have been got. The results point out that the distributions of the Na atoms density change vs time apparently. The sodium layers lie between 80￣105 km, and the maximum Na density lies between 92￣95 km, its value varies from 1×10 9 to 3×10 9 atoms/m 3 when there are no meter rains.