Integrated Assessment of the Influences of Emission Sources, Meteorology and Atmospheric Chemistry on Aerosol Loadings over South Asia: Implications for Regional Climate

这项研究将使用综合建模方法来了解自然和人为气溶胶源以及南亚地区不同来源部门对偏远印度洋观测到的气溶胶负荷的相对贡献。PI将检查气象学，远程传输和大气化学对这些负载的影响。主要科学目标是：（1）确定印度次大陆上空气溶胶和气态物质的区域分布特征，（2）通过比较模型模拟与现有测量，了解碳质气溶胶的假定排放因子和排放估计对观测到的化学收支的相对作用，（3）调查不断变化的排放情景的影响（例如，替代燃料策略）对气相污染物、散射和吸收气溶胶的负荷以及因此对辐射收支的影响。更广泛的影响：这项研究将阐明气溶胶在扰动对亚洲区域经济和环境福利至关重要的气候变量方面的作用。它将通过使用每个参与机构的研究生来帮助培养未来的科学家：北卡罗来纳州大学、阿贡国家实验室和孟买印度理工学院。它还将在一个发展中国家建立使用先进建模方法的能力，以处理人类活动对环境的不利影响。

This research will use an integrated modeling approach to understand the relative contributions of natural and anthropogenic aerosol sources as well as the different source sectors in the South Asia region, to the observed aerosol loadings in the remote Indian Ocean. The PIs will examine the influences of meteorology, long-range transport, and atmospheric chemistry on these loadings. The main scientific objectives are to:(1) characterize the regional distribution of aerosol and gaseous species over the Indian subcontinent, (2) understand the relative roles of assumed emission factors and emissions estimates of carbonaceous aerosols on observed chemical budgets by comparing model simulations with available measurements, and, (3) investigate the impact of changing emission scenarios (e.g., alternative fuel strategies) on the loadings of gas-phase pollutants, scattering and absorbing aerosol, and consequently the radiation budget. Broader Impacts:The research will illuminate the role of aerosols in perturbing climate variables most vital to the Asian regional economic and environmental welfare. It will help train future scientists through the use of graduate students at each participating institution: the University of North Carolina, Argonne National Laboratory, and the Indian Institute of Technology, Bombay. It will also build capacity in a developing country to use advanced modeling methods to address the adverse impacts of anthropogenic activities on the environment.