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

本研究将使用综合建模方法来了解南亚地区自然和人为气溶胶源以及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将研究气象学、远程传输和大气化学对这些装载的影响。主要的科学目标是：(1)表征印度次大陆上气溶胶和气态物种的区域分布特征；(2)通过将模式模拟与现有测量结果进行比较，了解假设的排放因子和碳质气溶胶的排放估计值对观测到的化学收支的相对作用；(3)调查变化的排放情景（例如替代燃料策略）对气相污染物负荷的影响。散射和吸收气溶胶，因此辐射收支。更广泛的影响：这项研究将阐明气溶胶在扰乱对亚洲区域经济和环境福利至关重要的气候变量中的作用。它将通过在每个参与机构（北卡罗来纳大学、阿贡国家实验室和印度理工学院孟买分校）使用研究生来帮助培训未来的科学家。它还将在一个发展中国家建立能力，利用先进的建模方法来处理人为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.