西太平洋气溶胶微量元素的初步研究

STUDY ON TRACE ELEMENTS IN AEROSOL OVER THE WESTERN PACIFIC OCEAN

本文根据TOGA计划第二航次中采集的气溶胶样品对西太平洋气溶胶的微量元素进行了初步研究。结果表明,海洋气溶胶中Si,Fe,Mn,Ti等地壳元素以及Cu,Zn等一些重金属元素的浓度较陆地相对清洁区气溶胶低。但在近大陆海洋气溶胶中Cu,Fe,K,Si,S等元素的含量相对较高。在调查的海域内气溶胶微量元素的浓度呈现出地理位置和季节上的变化。

Aerosol samples were collected over the Western Pacific Ocean during the second cruise of the TOGA Program. PIXE analytical method was used to deter-mine elemental compositions of these marine aerosol samples. The results show that the heavy metal elements in aerosol are found to be much lower than that of aerosol collected on continent. However, relatively higher concentrations of Fe, Cu, Zn, Si are observed in the samples collected near the continent. Season trend is apparent in the total concentration of the measured elements, with higher concentration being observed in spring than in autumn.