摘要
分析了北极的一次考察观测结果;同时列举了近几年对北极气溶胶观测结果;并利用NCEP/NCAR再分析资料对由戈壁沙漠与黄土高原地区向北极输送气溶胶的可能性做了分析;并且对这一地区在1994年,1995年内可能到达北极的气溶胶运动轨迹所占的比例进行了统计研究.
Arctic haze is a famous polluting phenomenon in Arctic region. As the haze or aerosols over Arctic affects the budget of radiation, many research projects recently focus on the problems.The results of analysing the contents of the Arctic aerosols showed that the main part of aerosols is dust. Some researchers guess that the dust source to Arctic is Chinas Gobi desert and Loess plateau. The results of a observation of Arctic aerosols with the callaboration of Mainz University and Frankfurt University, Germany in 1994, are analysed; the aerosols transport routes from Gobi desert and Loess plateau to Arctic are ascertained by forward trajectory analysis. The forward trajectories are made at several isobaric levels, and the wind fields for the trajectories are form NCEP/NCAR 40 year reanalysed data. A statistical analysis is made for the percentage of trajectories which could travel from Gobi desert and Loess plateau to Arctic in total trajectories which originate from Gobi desert and Loess plateau in 1994 and 1995. From the statistical analysis, we get the concept that in winter and spring there are more trajectories from Gobi desert and Loess plateau to reach Arctic, about 10%, than in other seasons. The transport routes are usually first to northeast through northern part of Japan or eastern part of Siberia, then to the north to reach Arctic. This travelling routes are in accordance with the circulation patterns of middle latitude in upper atmosphere.
出处
《兰州大学学报(自然科学版)》
CAS
CSCD
北大核心
1998年第1期128-134,共7页
Journal of Lanzhou University(Natural Sciences)