VOCALS: Cloud Chemistry Measurements in the Southeast Pacific

VOCALS：东南太平洋的云化学测量

• 批准号: 0745337
• 负责人: Jeffrey Collett
• 金额: $ 22.45万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-03-01 至 2011-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0745337&HistoricalAwards=false
• 关键词: VOCALS; Cloud; Chemistry; Measurements; Southeast

An airborne cloud water collector will be deployed on the NSF/NCAR C-130 aircraft to study marine cloud composition and aerosol-cloud interactions in the 2008 VOCALS-REx (VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment) project. The focus of VOCALS is to improve model simulations and predictions of the climate system in the Southeast Pacific (SEP). Multiple cloud water samples will be collected on approximately 10-12 VOCALS flights. These samples will be chemically analyzed for a wide variety of major and trace species including chloride, sulfate, nitrate, sodium, other ions, total organic carbon (TOC), partially oxidized sulfur compounds, hydrogen peroxide (H2O2), and a range of carboxylic acids. These measurements will provide information on the composition of clouds both near shore and further west in the SE Pacific, a region with few previous observations of marine cloud chemistry. Characterization of sulfur oxidation chemistry within clouds is key to understanding and modeling the lifetimes of sulfur dioxide (SO2) in this region in order to improve our understanding of whether SO2 oxidized in the gas phase to sulfuric acid (H2SO4) followed by nucleation of new particles in pockets of open cells (POCs) is likely to be of local biogenic or more distant anthropogenic origin.Broader impacts include the education and training of one graduate student, who will gain a unique set of skills related to cloud chemistry and benefit from broader exposure to this large, international experiment. Project results will be incorporated into educational materials to be shared with students and the community at a range of educational levels. The participants also plan to participate in broader educational and outreach activities currently being planned in conjunction with the VOCALS-REx field experiment.

将在NSF/NCAR C-130飞机上部署一个机载云水收集器，以研究2008年VOCALS-REx（VAMOS海洋-云-大气-陆地研究区域实验）项目中的海洋云成分和气溶胶-云相互作用。 VOCALS的重点是改进东南太平洋气候系统（SEP）的模式模拟和预测。 将在大约10-12次VOCALS飞行中收集多个云水样本。 将对这些样品进行化学分析，以确定各种主要和痕量物质，包括氯化物、硫酸盐、硝酸盐、钠、其他离子、总有机碳（TOC）、部分氧化的硫化合物、过氧化氢（H2 O2）和一系列羧酸。 这些测量将提供有关东南太平洋海岸附近和更西部的云的组成的信息，该地区以前很少观测海洋云化学。 云内硫氧化化学的表征是理解和模拟该区域二氧化硫（SO2）寿命的关键，以提高我们对SO2是否在气相中氧化为硫酸（H2SO 4），然后在开孔（POC）口袋中成核新颗粒的理解。很可能是当地的生物起源或更遥远的人为起源。更广泛的影响包括一名研究生的教育和培训，他们将获得一套与云化学相关的独特技能，并从更广泛地接触这一大型国际实验中受益。 项目成果将纳入教材，与各级教育的学生和社区分享。 参加者还计划参加目前正在结合VOCALS-REx实地试验规划的更广泛的教育和外联活动。