Airborne measurements of carbonaceous aerosols on the East Coast of the United States
Airborne measurements of carbonaceous aerosols on the East Coast of the United States
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DOI：
10.1029/97jd02793
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发表时间：
1997-12
影响因子：
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通讯作者：
T. Novakov;D. Hegg;P. Hobbs
中科院分区：
文献类型：
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作者：
T. Novakov;D. Hegg;P. Hobbs
在本文中，我们报告的碳质气溶胶的质量浓度，总气溶胶质量的飞机测量结果，同时确定的光散射和吸收系数的陆上和海上的美国东部海岸。我们描述了用于获得空间分辨气溶胶碳浓度的采样和分析方法，并在其他同时收集的数据的背景下讨论这些。碳质量平均占总干气溶胶质量的50%。碳的质量分数往往随着高度的增加，这表明地面测量可以显着低估的重要性，碳物种的气溶胶柱质量预算。气溶胶碳质量与气溶胶光吸收显着相关，这表明黑色和有机碳成分，至少部分，共同的燃烧源。光吸收系数与碳质量的回归表明，碳质量的约10%是黑色（光吸收）碳的形式。
In this paper we report results of aircraft measurements of mass concentrations of carbonaceous aerosols, total aerosol mass, and simultaneously determined light scattering and absorption coefficients onshore and offshore of the eastern coast of the United States. We describe the sampling and analytical methodology used to derive spatially resolved aerosol carbon concentrations and discuss these in the context of other concurrently collected data. The carbon mass was, on average, 50% of the total dry aerosol mass. The carbon mass fraction tended to increase with altitude, suggesting that ground-based measurements can significantly underestimate the importance of carbon species in the column aerosol mass budget. The aerosol carbon mass was significantly correlated with aerosol light absorption, suggesting that the black and organic carbon components have, at least in part, common combustion sources. A regression of the light absorption coefficient onto carbon mass suggests that ∼10% of the carbon mass is in the form of black (light-absorbing) carbon.