International Research Fellowship Program: Atmospheric Implications of the Temperature-and State-dependent Chemistry of Organic Aerosol

1006117 Huisman国际研究奖学金计划使美国科学家和工程师能够在国外进行9到24个月的研究。 该计划的奖项提供了联合研究的机会，并使用独特或互补的设施，专业知识和国外的实验条件。该奖项将支持博士安德鲁J.豪斯曼24个月的研究奖学金与博士托马斯彼得在苏黎世联邦理工学院，Switzerland.Aerosols（包括二次有机气溶胶（SOA））与许多现象有关，包括气候变化和人类健康影响，并且正正确地成为大气化学、大气工程和气候模拟领域的优先事项。涉及二次有机气溶胶的详细机制特别重要，因为它们是气候预测中最大的不确定因素之一。这项研究将直接有助于我们理解气溶胶和驱动它们的微观过程。这样做，它将有助于理解和解决气溶胶在减缓全球变暖和恶化空气质量方面的作用。这项工作可能会导致气溶胶科学领域的进步，减少气溶胶过程的不确定性，为科学家和决策者提供有价值的信息，从区域空气质量到全球气候变化的问题。对流层气溶胶的物理状态仍然在很大程度上是未知的，尽管它对云的形成，大气化学，大气辐射收支，因此，气候的重要性。在其他主题中，气溶胶中有机化合物（在许多情况下占气溶胶质量的一半以上）的化学反应知之甚少，尽管它们对对流层化学很重要。一般来说，关于气溶胶中化学和物理性质之间的相互作用的信息很少。 我们假设气溶胶中有机化合物的化学处理将改变气溶胶的物理性质，这些物理性质可能反过来影响化学处理的程度。这些变化可能通过气体/颗粒的分离导致大气相关气体的新汇或新源，以及由于吸湿增长的变化而改变气溶胶的寿命或云形成潜力。在这项工作中，我们调查这些属性，以获得有关它们对气溶胶过程的总影响的信息。

1006117HuismanThe International Research Fellowship Program enables U.S. scientists and engineers to conduct nine to twenty-four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad.This award will support a twenty-four-month research fellowship by Dr. Andrew J. Huisman to work with Dr. Thomas Peter at ETH in Zurich, Switzerland.Aerosols (including Secondary Organic Aerosol (SOA)) have been linked to a number of phenomena including climate change and human health effects, and are rightly becoming a priority for the fields of atmospheric chemistry, atmospheric engineering, and climactic modeling. The detailed mechanisms involving Secondary Organic Aerosol are of particular importance as they represent one of the largest factors of uncertainty in climate predictions. This research will contribute directly to our understanding of aerosols and the microscopic processes that drive them. In so doing, it will contribute to understanding and resolving the role of aerosols both in mitigating global warming and in deteriorating air quality. This work may lead to advances in the field of aerosol science that decrease the uncertainty in aerosol processes, providing valuable information to scientists and policy makers on issues from regional air quality to global climate change.The physical state of tropospheric aerosol is still largely unknown despite its importance for cloud formation, atmospheric chemistry, the atmospheric radiation budget, and hence, climate. Among other topics, chemical reactions of organic compounds (which under many conditions represent over half of the aerosol mass) within aerosols are poorly understood, despite their importance to tropospheric chemistry. In general, there is very little information available concerning the interplay of chemistry and physical properties in aerosols. We hypothesize that chemical processing of organic compounds in aerosols will alter aerosol physical properties and that these physical properties may, in turn, influence the extent of chemical processing. These changes may lead to new sinks or sources of atmospherically relevant gases via gas/particle partitioning, as well as altering the lifetime or cloud formation potential of aerosols due to changes in hygroscopic growth. In this work, we investigate these properties to gain information about the total effect that they exert on aerosol processes.