High Resolution Atmospheric/Chemical Transport Modeling for Asian Pollution

本项目的目标是利用天气研究和预报-化学模式研究气溶胶和温室气体对亚洲区域大气层结的影响（以及随之对动力学/物理学的影响）。将利用这一模型进行敏感性研究，以评估在存在二氧化碳、水蒸气和对流层臭氧等温室气体以及黑碳和灰尘等气溶胶的情况下太阳对低层大气的加热。 具体而言，敏感性研究将寻求为以下目前尚未解决的问题提供解释：i）更多的气溶胶或温室气体是否会导致低层大气的太阳加热增加; ii）这是否会增加逆温（抑制对流）从而增加污染事件的频率和强度;（iii）哪些气溶胶和温室气体对热稳定性和降水过程影响最大; iv）来自气溶胶的辐射效应或微物理效应对降水的预测是否有更大的影响;最后，v）增加相互作用化学对WRF模式的预测有多大影响？通过这项研究，PI希望为WRF-Chem模式的发展做出贡献，并研究气溶胶和温室气体对亚洲降水和气溶胶/辐射相互作用参数化的影响。更广泛的影响：一名研究生将在她的博士学位期间进行这项化学/气象学研究。在PI的指导下完成论文。 改善亚洲天气和区域气候的预测对于帮助该地区解决空气污染对健康和农业影响的政策问题具有重要意义。

The objective of this project is to use the Weather Research and Forecasting-Chemistry (WRF-CHEM) model to study the effects of aerosols and greenhouse gases (GHGs) on the atmospheric stratification (and consequent effects on dynamics/physics) over the Asian region. Sensitivity studies will be performed using this model to assess solar heating of the lower atmosphere in the presence of GHGs such as carbon dioxide (CO2), water vapor, and tropospheric ozone, as well as aerosols, such as black carbon and dust. Specifically, the sensitivity studies will seek to provide explanations for the following currently unresolved questions; i) do more aerosols or GHGs lead to an increase in the solar heating of the lower atmosphere; ii) does this increase the inversion (which inhibits convection) and thus contribute to the frequency and strength of pollution events; iii) which aerosols and GHGs affect thermal stability and precipitation processes the most; iv) do radiational effects or microphysical effects from aerosols have a greater impact on the forecast of precipitation; and finally, v) how much does the addition of interactive chemistry add to the forecast associated with the WRF model? From this study, the PI hopes to contribute to the development of the WRF-Chem model, and study the effect of aerosols and GHGs on the parameterization of precipitation and aerosol/radiative interaction over Asia.Broader Impacts: A graduate student will conduct this chemistry/meteorology research for her Ph.D. thesis under the guidance of the PI. Improving predictions of weather and regional climate in Asia are significant for aiding this region with policy issues regarding impacts of air pollution on health and agriculture.