Airborne Measurements of Inorganic Acids during the Deep Convective Clouds and Chemistry (DC3) Experiment

深对流云和化学 (DC3) 实验期间无机酸的机载测量

• 批准号: 1063652
• 负责人: Lewis Huey
• 金额: $ 45.5万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-04-15 至 2015-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1063652&HistoricalAwards=false
• 关键词: Airborne; Measurements; Inorganic; Acids; during

The Deep Convective Clouds and Chemistry (DC3) field campaign seeks to characterize the impact of convective systems on the chemistry and composition of the upper troposphere (UT). This project supports the deployment of a newly built chemical ionization mass spectrometer (CIMS) on the NSF/NCAR G-V aircraft to measure pernitric acid (HO2NO2), nitric acid (HNO3), hydrochloric acid (HCl), and sulfur dioxide (SO2). These observations will be interpreted to evaluate the impact of convection on UT photochemistry. HNO3 and HO2NO2 measured in and around convective outflow will provide valuable constraints on the chemical processes in these environments. The HO2NO2 observations will be particularly useful as the relatively short lifetime of this species makes it very sensitive to radical levels. Photochemical calculations will be performed to predict the observed HO2NO2 levels as well as the time evolution of the observed HNO3. This will allow a critical test of our understanding of processes that control radical levels and ozone production in the UT. Observations of SO2 will be used to assess the cloud processing of this species and serve as a useful comparison point with other aircraft involved in DC3. The HCl observations will serve as a tracer for stratospheric influence and provide a marker for lower altitude mid-continent chlorine chemistry. The information generated through this project will improve understanding of the impacts of convective storms on atmospheric chemistry. In addition, the CIMS instrument will become part of the facilities at NCAR and available for future investigators on the G-V. The project will support one Ph.D. student and form the core of his/her dissertation research. Two undergraduate students will gain valuable research experience through participation in the project. Finally, the PI will partner with a local Atlanta area high school to facilitate exposure of underrepresented minorities to higher education and scientific research.

深对流的云与化学（DC3）田间运动旨在表征对流系统对对流层上层（UT）的化学和组成的影响。 该项目支持在NSF/NCAR G-V飞机上部署新建造的化学电离质谱仪（CIMS），以测量pernitric Acid（HO2NO2），硝酸（HNO3），盐酸（HCL）（HCL）和硫二氧化二氧化碳（SO2）。 这些观察结果将被解释为评估对流对UT光化学的影响。 在对流流出和周围测量的HNO3和HO2NO2将对这些环境中的化学过程提供有价值的限制。 HO2NO2观察结果将特别有用，因为该物种的相对较短的寿命使其对激进水平非常敏感。 将进行光化学计算，以预测观察到的HO2NO2水平以及观察到的HNO3的时间演化。 这将允许对我们对控制UT中的激进水平和臭氧产生的过程的理解进行批判性检验。 SO2的观察将用于评估该物种的云处理，并将其作为与DC3参与的其他飞机的有用比较点。 HCL观察结果将作为平流层影响的示踪剂，并为较低海拔中高氯化学的标记提供标记。通过该项目产生的信息将提高人们对对流风暴对大气化学的影响的理解。 此外，CIMS仪器将成为NCAR设施的一部分，并在G-V的未来调查人员中使用。该项目将支持一位博士学位。学生并构成他/她的论文研究的核心。 两名本科生将通过参与该项目获得宝贵的研究经验。 最后，PI将与当地的亚特兰大地区高中合作，以促进代表性不足的少数民族进入高等教育和科学研究。