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| Investigating the Effects Of Atmospheric Aging on the Radiative Properties and Climate Impacts of Black Carbon Aerosol | |
| 项目编号 | R835033 |
| Jesse H. Kroll | |
| 项目主持机构 | University of Illinois at Urbana-Champaign,University of Maryland,University of Maryland - College Park |
| 开始日期 | 2012-05-01 |
| 结束日期 | 2015-04-01 |
| 英文摘要 | Epidemiological evidence suggests that the association between cardiac mortality and PM10 concentrations changes between the summer and winter months in the San Joaquin Valley. This shift is likely caused by seasonal variation in the size and composition distribution of airborne particles. This project will perform inhalation exposure and particle characterization studies at rural and urban locations in the summer and winter months to quantify the features of the airborne particles that are associated with adverse health effects.Inhalation exposure studies will be carried out using mice that are exposed to ambient airborne particles and concentrated ambient airborne particles in the San Joaquin Valley. Exposures will be conducted in the summer and winter in both an urban and rural location to take advantage of the changes that occur in particle chemical composition and size distribution as a function of season and location. Heart rate variability, lung inflammation, and markers for oxidative stress will be monitored. Collocated measurements of PM2.5 and PM0.1 composition will be made to quantify health effects associated with chemical composition and support source apportionment calculations. Inhalation studies of direct emissions will be conducted for the dominant sources of PM2.5 and PM0.1 that are identified during ambient studies. Based on our results, we will postulate possible mechanisms for health effects and test these using laboratory studies and simple model particles.We will identify the composition and size fraction of the airborne particles that cause adverse health effects in the San Joaquin Valley. The source origin of these unhealthy particles will be determined using source apportionment calculations. These findings will support an improved mechanistic understanding of how airborne particles cause negative health effects. |
| 英文关键词 | cardiopulmonary;ultrafine particles;histology;immunohistochemistry;microassay;biology;pathology;physics;engineering;nanotechnology;metabolism;bioavailability;chemical mass balance model;ammonium;nitrates;sulfates;carbon;biochemistry;particulate matter;ambient air;ozone;sensitive populations;agriculture;transportation, |
| 学科分类 | 0805 - 大气科学;;08 - 地球科学;09 - 环境科学 |
| 资助机构 | US-EPA |
| 项目经费 | 899654 |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/77088 |
| 推荐引用方式 GB/T 7714 | Jesse H. Kroll.Investigating the Effects Of Atmospheric Aging on the Radiative Properties and Climate Impacts of Black Carbon Aerosol.2012. |
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