Collaborative Research: Atmospheric Mixed Phase Chemistry for Improved Climate Predictions: Field Measurements and Modeling of the Southern Oxidant and Aerosol Study

合作研究：用于改进气候预测的大气混合相化学：南方氧化剂和气溶胶研究的现场测量和建模

• 批准号: 1242258
• 负责人: Rodney Weber
• 金额: $ 35.95万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-04-01 至 2017-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1242258&HistoricalAwards=false
• 关键词: Collaborative; Research; Atmospheric; Mixed; Phase

This project will investigate processes associated with the natural emissions of biogenic volatile organic compounds (BVOCs) that lead to the formation of secondary organic aerosol (SOA). Of particular interest is the assessment of organic compounds derived from BVOC oxidation that are water-soluble, CCN-active and react readily with the OH radical in controlled laboratory experiments to create low-volatility products that may form secondary aerosol via multiphase organic chemistry. Continuous measurements of SOA chemical and physical properties will be made during the Southern Oxidant and Aerosol Study (SOAS) to be conducted near Centreville Alabama in the summer of 2013. This study will focus on the role of particle phase liquid water and particle pH in determining SOA mass. The data will be analyzed to elucidate the linkages between bio- and anthropogenic emissions on multiphase chemistry, and estimate the magnitude of the contribution of multiphase pathways to SOA.This research is needed in order to improve understanding of local and global climate and air quality. The results may help explain whether the anomalous temperature trend in the Southeast, which has not warmed like other regions in response to global climate change, is due to interactions among biogenic and anthropogenic emissions that can affect regional climate through formation of secondary organic aerosol. During the field campaign, there will be many activities supporting science communication and education.

该项目将研究与生物挥发性有机化合物（BVOC）自然排放相关的过程，这些过程会导致二次有机气溶胶（SOA）的形成。特别令人感兴趣的是对 BVOC 氧化衍生的有机化合物进行评估，这些有机化合物是水溶性的、CCN 活性的，并且在受控实验室实验中容易与 OH 自由基反应，以产生可通过多相有机化学形成二次气溶胶的低挥发性产品。 2013 年夏天，将在阿拉巴马州森特维尔附近进行南方氧化剂和气溶胶研究 (SOAS) 期间，对 SOA 的化学和物理特性进行连续测量。这项研究将重点关注颗粒相液态水和颗粒 pH 值在确定 SOA 质量中的作用。将分析这些数据，以阐明多相化学中生物排放和人为排放之间的联系，并估计多相路径对 SOA 的贡献程度。需要进行这项研究，以增进对当地和全球气候和空气质量的了解。这些结果可能有助于解释东南部的异常气温趋势是否是由于生物排放和人为排放之间的相互作用造成的，这种相互作用可以通过形成二次有机气溶胶影响区域气候。东南部没有像其他地区那样因全球气候变化而变暖。野外活动期间，将开展许多支持科学传播和教育的活动。