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首页> 外文会议>Joint annual meeting of the International Society of Exposure Science and the International Society for Environmental Epidemiology >Synoptic features of atmospheric particle in urban environment of India
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Synoptic features of atmospheric particle in urban environment of India

机译：印度城市环境中大气粒子的天气特征

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Atmospheric aerosols are a manifold mixture of airborne particles from various sources and play a significant role in influencing the weather, air quality and climate on regional and global scales. They contain a range of oxidising aerosol components (Reactive Oxygen Species), which are potentially toxic as they can oxidise biological molecules at the liquid lung surface layer or generate oxidising components once deposited on the lung surface. Here, we examined different aspects of atmospheric aerosols in ambient environment in Indian context in term of carbonaceous aerosols (OC, EC, SOC and POC), morphology (size, shape, mixing states, circularity and aspect ratio etc), trace metals and their carcinogenic outcomes with respect to human health. Surface observation studies indicated that Particulate mass (150-200 u.g m-3) levels are higher than Indian and WHO standards limit values. Carbonaceous aerosol studies have revealed that being a high loading of OC (50-70 ug m-3) and EC (10-15 ug m-3) associated with fine particles in Indian cities. The role of individual chemical species of aerosols in light extinction was estimated, the contributions of light scattering coefficient by particles (bsp) were OC (45%), (NH4)2S04 (17%), NH4N03 (8%) and coarse mass (12%) while, the contribution of light absorption coefficient by particle (bap) was 18% (EC). Morphological features of atmospheric particles indicated the synoptic changes in environment. Overall this attempt has been made to study the impact of atmospheric aerosols on regional climate as atmospheric aerosol is one of the most uncertain aspect of aerosol science in estimating climatic and health impact of aerosols.
机译：大气气溶胶是来自各种来源的空气传播颗粒的多种混合物，并且在影响区域和全球范围的天气，空气质量和气候方面发挥着重要作用。它们包含一系列氧化性气溶胶成分（活性氧物种），它们具有潜在的毒性，因为它们可以在液肺表面层上氧化生物分子或一旦沉积在肺表面上就产生氧化成分。在这里，我们从碳质气溶胶（OC，EC，SOC和POC），形态（大小，形状，混合状态，圆度和长宽比等），痕量金属及其形态的角度研究了印度环境中大气气溶胶的不同方面。与人类健康有关的致癌结果。表面观察研究表明，微粒质量（150-200 u.g m-3）水平高于印度和世界卫生组织的标准限值。碳质气溶胶研究表明，在印度城市中，高浓度的OC（50-70 ug m-3）和EC（10-15 ug m-3）与细颗粒有关。估计了气溶胶中各个化学物质在消光中的作用，颗粒（bsp）对光散射系数的贡献为OC（45％），（NH4）2SO4（17％），NH4N03（8％）和粗质量（ 12％），而颗粒（带）的光吸收系数的贡献为18％（EC）。大气颗粒的形态特征表明了环境的天气变化。总的来说，已经进行了这种尝试来研究大气气溶胶对区域气候的影响，因为在估算气溶胶对气候和健康的影响时，大气气溶胶是气溶胶科学中最不确定的方面之一。

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