摘要
来自于西北非洲的沙尘粒子经常被输送到北大西洋(5 0°W～ 2 0°W,1 0°N～ 2 5°N)区域,夏季 7月份最为明显,沙尘输送带位于两逆温层之间.沙尘的辐射效应主要体现在冷却海表面而加热低对流层,因此沙尘有可能通过影响大气垂直稳定度从而影响海洋层云.试图通过分析 1 984年至 1 989年共 6年的7月份沙尘气溶胶、云观测资料来揭示沙尘气溶胶与大气稳定度以及层云之间的相互关系.结果表明,沙尘气溶胶能够通过影响大气稳定度而对层云产生影响。
Massive dust aerosols from the Northwest Africa exporting to the research region ( 50°W～20°W, 10°N～25°N) during the summer season, with a peak in July, are regularly observed by satellite. Dust aerosols are confined within the layer between two inversions. The main effect of them is to heat the lower troposphere, but cool the surface, so the presence of dust may cause a stabilizing effect on the temperature lapse rate, then affect the ocean low level stratus cover. Attempt to illustrate these relations based mainly on the satellite measurement of cloud and dust amount in July for six years (1984～1989). The results show that, in this location, the presence of dust may influence the stratus cover through media of static stability, although the signal is not easy to be revealed due to a few disturbances of undesirable factors.
出处
《中国科学院研究生院学报》
CAS
CSCD
2003年第1期92-96,共5页
Journal of the Graduate School of the Chinese Academy of Sciences
基金
supportedbyChinaNKBRSFProject(G19990 43 40 0 )andKnowledgeInnovationprojectKZCX2 3 0 5fundedbyChineseAcademyofSciences
