摘要
本文提出了用宽带辐射资料回归内插求取大气光学厚度谱的方法。利用１９６６年和１９６８年珠穆朗玛峰地区科学考察期间得到的太阳直接辐射光谱资料，获得了该地区大气气溶胶光学厚度谱。最高观测站东绒布冰川（海拔６３００ｍ）波长在０．５５μｍ的气溶胶光学厚度春季平均为０．０４４±０．０１７，与南极地区有相似的量级，比内陆人口密集地区小一个数量级。由光学厚度谱反演出了珠峰地区的大气气溶胶的粒子谱分布特征，并与包括１９８６年中美西藏科学考察结果在内的诸多资料做了对比。研究表明，拉萨的大气气溶胶光学厚度在１９６６－１９８６的２０年间平均约有１．８％的年增长率。
A method of determining atmospheric optical depth spectra from wide-band direct solar radiation is presented. The wavelength dependence of aerosol optical depth in the region of Mount,Qomolongma is obtained by this method from observations of the period 1966 to 1968's MQ Scientific Survey.The aerosol optical depth at 0.55μm wavelength for the highest station,the East Rongbu Glacier (6300 m above sea level) in the spring is 0.044 ±0.017, which is comparable to that obtained at the Antarctic observation station, but less by an order of magnitude than that for the populated inland area. Also, aerosol size distributions over the region are retrieved from the optical depth spectra. By comparison and combination with the radiation data of the 1986's Sino-American Cooperation Scientific Survey in Tibet, it is shown that the aerosol optical depth in Lhasa area increases with a rate of 1 .8% per year.
出处
《大气科学》
CSCD
北大核心
1995年第6期755-763,共9页
Chinese Journal of Atmospheric Sciences
基金
中国博士后科学基金
国家自然科学基金
关键词
直接辐射
大气
气溶胶
光学厚度
珠穆朗玛峰
direct solar radiation
atmospheric aerosol
optical depth
particle size distribution.
