天文宁静度的边界层气候资料的观测

根据１９９４年１０－１２月北京天文台兴隆站的初步观测，分析了的某些规律。资料表明，表面层内的的瞬时值变化幅度相当大，几秒钟内可达一个量级以上，几分钟内可达两个量级以上。的三分钟平均值在晴朗夜晚变化超过两个量级的也不少见。整个边界层的积分值的变化幅度会小一点，但一晚上达到一个量级应不少见。静风时，山顶的逆温也迅速发展，积分值迅速变大，对星象质量不利。对静风频数的监测并配合声雷达的或ｒ０测量，再加上湿度记录可以积累起有价值的宁静度边界层气候资料。

Observation of the Climate Data for the Boundary Layer of the Astronomical Seeing

The regular Pattern Of the a is analysed in this Paper according to the primary Observations at the Xinglong Station, Beijing Astronomical Observatory during Oct. -Dec. 1994. It is shown that the variation range of the instantaneous in the surface layer is very large which can reach over one ceder of magnitude within several seconds and tWo Older Of magnitude within several minutes. It is frequntly found that the average variations in 3 minutes at clear nights are over two older of magnitude. The variation range of the integrated in the boundary layer is rather small, however it can nab one older Of magnitude at all night. At the qUiescent wind condition the temperature inversion at the summit is developed rapidly, and the integrated also rapidly becomes large that is harmful for the star image quality. The climate data for the boundary layer of the astronomical seeing can be obtained with the monitoring the wind condition, determination of or r0 by using the sound radar and the humidity measuremout.