Impacts of the Biosphere on Global Tropospheric Chemistry and Climate

该奖项是根据2009年《美国复苏和再投资法》(公法111-5)资助的。该项目通过更新一个三维全球模型(社区大气模型--化学与社区土地模型)，解决了我们对大气中生物来源气体和气溶胶来源的一个重大不确定领域。将明确模拟几种倍半萜的排放和加工，并将在二次有机气溶胶形成的背景下考虑可能的新的异戊二烯反应机理。这些机制对大气的氧化能力有重要影响，并将有助于减少有关大气有机气溶胶来源、分布和组成的不确定性。较大的影响将包括传统的学生培训和课程开发。将通过大气研究和科学重大机会(SOARS)计划招募一名本科生，该计划为历史上在科学领域代表性不足的群体的学生提供参加夏季研究活动的机会。传统的同行评议期刊文章和会议报告的途径将增进科学理解。这项工作的社会效益将来自于对地球系统目前如何运作的更好的理解，以及对未来气候情景模拟的改进的模型框架。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This project addresses a significant area of uncertainty in our understanding of biogenic sources of gases and aerosols to the atmosphere by updating a 3-dimensional global model (Community Atmospheric Model - Chemistry coupled with Community Land Model). Emissions and processing of several sesquiterpenes will be explicitly simulated and possible new isoprene reaction mechanisms will be considered in the context of secondary organic aerosol formation. These mechanisms have important ramifications for the oxidative capacity of the atmosphere and will help to reduce uncertainties about sources, distributions, and composition of atmospheric organic aerosols.Broader impacts will include traditional student training and course development. An undergraduate will be recruited via the Significant Opportunities in Atmospheric Research and Science (SOARS) program, which provides an opportunity for students of historically underrepresented groups in science to participate in summer research activities. Traditional avenues of peer-reviewed journal articles and conference presentations will enhance scientific understanding. The societal benefit of this work will derive from improved understanding of how the Earth system currently functions and from an improved model framework for simulations of future climate scenarios.