摘要
对1993年9月~1994年8月在青藏高原五道梁采集到的气溶胶样品中多种化学元素成分的浓度资料,用因子分析、富集因子和稀土元素分布模态综合判断该地区低层大气气溶胶的来源,同时还讨论了源的季节变化以及各源气溶胶质量浓度的相对贡献。结果表明,五道梁低层大气气溶胶在夏、秋季有三个源:地表土壤源、海洋源和局地污染源,但春季无海洋源。地表土壤源在全年均为五道梁气溶胶的主要来源,在夏季和秋季,地表土壤尘对五道梁气溶胶总质量浓度的相对贡献分别为70.4%和82.8%;在春季,地表土壤尘分为大范围背景土壤尘和局地土壤尘,大范围背景土壤尘的相对贡献为78.5%,局地土壤尘约为9.0%。局地污染源对气溶胶总质量浓度的贡献小而稳定,各季平均约为5.0%~12.0%,其大小与其中所含土壤尘的多少有关。
The factor analysis(FA)、enrichment factors(EF) and rare-earth element(REE)distribution models were employed for searching the sources of atmospheric aerosol and their seasonal variation at Wudaoliang over Qinghai-Xizang Plateau. The aerosol samples were sampled in autumn(September~October,1993),spring(April~May,1994) and summer(July~August,1994). The results show that there are three sources of the aerosol at Wudaoliang,they are earth crustal aerosol(soil dust),pollution aerosol and marine aerosol. The soil dust is the main source of the aerosol at Wudaoliang, their mass concentration is about 80% of the totals of the aerosol. The air pollution is not serious, the mass concentration of pollution aerosol is about 5.0%~12.0% of the totals. The marine aerosol was fund only in summer and autumn.
出处
《高原气象》
CSCD
北大核心
1997年第4期337-344,共8页
Plateau Meteorology
基金
国家攀登项目
关键词
青藏高原
大气
气溶胶
污染源
空气污染
Qinghai-Xizang Plateau Atmospheric aerosol Pollution sources