南加州空气盆地收集的气溶胶颗粒中硫酸盐的稳定同位素组成

The International journal of applied radiation and isotopes Pub Date : 1985-12-01 DOI:10.1016/0020-708X(85)90253-4

William W. Wong , Wai-Kwok Ho , Robert L. Brewer , Isaac R. Kaplan

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引用次数: 3

摘要

分别于1979年7月24日和7月25日夜间，用Sierra和Misco级联撞击器在南加州空气盆地的Lennox和Duarte收集了气溶胶颗粒。测定了这些气溶胶中硫酸盐、硝酸盐和氯化物的浓度以及硫酸盐的34S32S比(δ34S)。在0.95 ~ 1.5 μm的样品中，δ 34S值反复出现明显的最小值。样品中δ 34S值与硫酸盐浓度呈负相关，与氯化物含量呈显著相关。结果表明，气溶胶颗粒中存在海洋硫酸盐和工业硫酸盐的混合物。

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Stable isotope composition of sulfates in aerosol particles collected in the Southern California Air Basin

Aerosol particles were collected at Lennox and Duarte in the Southern California Air Basin with Sierra and, or, Misco cascade impactors at night on 24 July and 25 July 1979, respectively. The concentrations of sulfate, nitrate, and chloride and the $^{34} S^{32} S$ ratios (as δ³⁴S) of sulfate in these aerosols were determined. A pronounced and repetitive minimum of δ ³⁴S value in the 0.95- to 1.5-μm fraction was observed at both collection sites. An inverse relationship between the δ ³⁴S values and sulfate concentration and a significant correlation between the δ ³⁴S values and chloride content were observed in these samples. The results indicate admixture of marine and industrial sulfate in the aerosol particles.

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The International journal of applied radiation and isotopes

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