Collaborative Research: Program for Research on Oxidants: Photochemistry Emissions and Transport (PROPHET) 2009--Community Atmosphere-Biosphere INteractions EXperiment (CABINEX)

该奖项是根据2009年美国复苏和再投资法案(公法111-5)资助的。这项关于森林大气光化学的合作调查将采用一套独特的合作方法，重点放在近树冠环境中发生的化学物质上。现在众所周知，森林排放生物源挥发性有机化合物(BVOCs)，影响上覆大气的物理(例如气溶胶)和化学(例如臭氧)组成，进而影响森林生产力。然而，最近对森林地区氢氧化物(HOX)自由基的测量与模型预测有很大不同，这使得人们对BVOCs的化学及其对臭氧和二次气溶胶形成的化学贡献的理解产生了疑问。2009年夏天，密歇根大学生物站(UMBS)将利用PROPHET(氧化剂研究计划：光化学、排放和运输)和FASET(森林加速演替实验)的设施、经验和人力资源开展密集的实地活动。UMBS是理想的研究界资产，使人们能够更好地了解BVOCs影响的复杂大气化学，此外，还可以观察这种化学在森林组成和气候变化的背景下可能发生的变化。HOX、BVOC、气溶胶和氧化产物的测量组合将使用一系列复杂的仪器技术，利用我们探测垂直维度的基础设施(塔楼、天棚访问车辆、气溶胶激光雷达和仪表化飞机)。然后，这些测量将为旨在测试当前理解的建模工作提供信息。预计将有12名研究生和至少同样多的本科生研究助理参加实地活动。在研究期间，将举行频繁的数据会议，学生将在会上介绍和讨论初步数据的科学含义。大气科学家将有许多机会与整个UMBS社区进行接触和合作。将在密歇根州立大学举办一次科学研讨会，其中将包括对大气-森林相互作用感兴趣的森林生态学和生物地球化学研究人员。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This collaborative investigation into the forest atmosphere photochemistry will apply a unique set of collaborative approaches, focused on the chemistry occurring in the near-canopy environment. It is now well known that forests emit biogenic volatile organic compounds (BVOCs) that impact the physical (e.g. aerosols) and chemical (e.g. ozone) composition of the overlying atmosphere, and that this in turn impacts forest productivity. However, recent measurements of hydrogen oxide (HOx) radicals in forested areas differ significantly from model predictions, bringing into question understanding of the chemistry of BVOCs and their contribution to the chemistry of ozone and secondary aerosol formation. An intensive field campaign at the University of Michigan Biological Station (UMBS) during the summer of 2009 will take advantage of both the PROPHET (Program for Research on Oxidants: PHotochemistry, Emissions and Transport) and the FASET (Forest Accelerated Succession ExperimenT) facilities, experience and human resources. UMBS represents the ideal research community asset to enable pursuit of a better understanding of the complex atmospheric chemistry impacted by BVOCs and, additionally, to observe how that chemistry may change in the context of changing forest composition and climate. A combination of HOx, BVOC, aerosol, and oxidation product measurements will be made using a wide array of sophisticated instrumental techniques, taking advantage of our infrastructure for probing the vertical dimension (towers, a canopy access vehicle, aerosol LIDAR, and an instrumented aircraft). These measurements will then inform a modeling effort aimed at testing current understanding. It is anticipated that 12 graduate students and at least as many undergraduate research assistants will participate in the field campaign. During the study frequent data meetings will be held in which students will present and discuss the scientific implications of preliminary data. There will be many opportunities for atmospheric scientists to interface and collaborate with the entire UMBS community. A science symposium at UMBS that will include the forest ecology and biogeochemistry researchers who have interest in atmosphere-forest interactions will be organized.