摘要
收集了我国１９７８─１９８６年和１９９０年，共１０年时间的１９２个地面气象站每天四次总云量的观测资料，分别计算了北京时间０８ｈ，０２ｈ和０８ｈ以及２０ｈ，０２ｈ和０８ｈ的无云概率。分析结果表明：我国所处的天文气候条件的大环境并非是世界上最好的，但在国内相对较好的区域里，精心挑选出受局部地形影响形成的较好台址还是有可能的。
The probability of cloudlessness at 08h Beijing time,02h and 08h Beijing time as well as 20h,02h and 08h Beijing time have been calculated respectively based on the data of the cloud with daily four times observation of 192 meteorological stations of China in the years 1990 and 1978─1986.The possible effects of climatic factor and general circulation to the seeing condition have also been analyzed preliminarily.The result shows that it is possible to select the better sites carefully which benefit from local topography although in comparison with the condition around the world the astro-climate condition of China is not the best generally for the dark-sky optical observatory.
基金
中国科学院天文委员会资助
关键词
天文气候
选址
大气视宁度
天文台
stro-climate, site testing,astrometeorology,atmospheric seeing
