Collaborative Research: Stratosphere-Troposphere Analyses of Regional Transport (START) Experiment (2008)

合作研究：区域运输的平流层-对流层分析 (START) 实验 (2008)

• 批准号: 0723327
• 负责人: Steven Wofsy
• 金额: $ 26.2万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0723327&HistoricalAwards=false
• 关键词: Collaborative; Research; Stratosphere; Troposphere; Analyses

The collaborative field experiment, Stratosphere-Troposphere Analyses of Regional Transport (START08), will study the chemical and transport characteristics of the extratropical upper tropospheric and lower stratospheric (ExUTLS) region. The experiment, which will take place during the Spring 2008 time period, utilizes the NSF/NCAR High-performance Instrumented Airborne Platform for Environmental Research (HIAPER) which has the range, endurance, and altitude ceiling necessary to conduct the research. The objective of the experiment is to use in situ chemical, microphysical, and dynamical measurements, satellite data, and models to better understand the multi-scale dynamical processes that control the chemical composition and microphysics of the ExUTLS. In particular, the investigation will focus on the behavior of the extratropical tropopause as a transport boundary and on key chemical transport pathways and the related dynamical processes. These processes include breaking of Rossby waves, the growth and decay of synoptic-scale waves, tropopause folds and warm conveyor belts, the development of frontal systems, initiation and breaking of gravity waves, and deep convection. In addition, these processes control the formation and evolution of the ice cloud layers in the ExUTLS. This field study will use tracer-tracer correlations as a diagnostic tool for transport in the UTLS region. The results of the experiment will include a set of diagnostics of chemical transitions between the UT and LS, an estimate of the lifetime of the air mass in the extra-tropical transition layer, and tracer characterizations of major transport processes that couple the UT and LS and which determine the structure and chemical composition of the UTLS. A small suite of microphysical probes will quantify the ice mass and water content of clouds in the UT/LS. With the enhanced measurement capability and platform compared to some earlier studies, START08 will provide more insight into the behavior of tracers and their relationships under the influence of targeted dynamical processes, and expand the database for establishing a theoretical framework for testing models. The project supports the development of community research capabilities in significant ways. START08 will train graduate students and post-doctoral scientists in both instrumental/analytical atmospheric chemistry and data analysis done collaboratively with modelers and other science team members. Research from the START08 project will be used to enhance current graduate education classes in atmospheric science. Additional educational outreach is planned that includes interaction with ongoing programs (e.g., National Ocean Science Bowl, and Project IMPACT).

协作现场实验，区域运输的平流层 - 对流层分析（Start08）将研究热带热带上层层和下层平流层（Exutls）区域的化学和转运特征。该实验将在2008年春季期间进行，它利用NSF/NCAR高性能仪器的环境研究平台（Hiaper），该平台具有进行研究所必需的范围，耐力和高度天花板。实验的目的是使用原位化学，微物理和动力学测量，卫星数据和模型，以更好地了解控制exutls的化学成分和微物理学的多尺度动力学过程。特别是，调查将集中于热带对流层面作为传输边界以及关键的化学传输途径和相关动力学过程的行为。这些过程包括破坏Rossby波，天气尺度波的生长和衰变，对流层顶褶皱和温暖的传送带，额叶系统的发展，重力波的启动和破裂以及深对流。另外，这些过程控制着冰云层的形成和演变。这项现场研究将使用示踪剂 - 跟踪器相关性作为在UTLS地区运输的诊断工具。实验的结果将包括一组UT和LS之间化学转变的诊断，对热带过渡层中空气质量寿命的估计值以及对UT和LS的主要运输过程的示踪剂表征并确定UTL的结构和化学组成。一小部分的微物理探针将量化UT/LS中云的冰块和水含量。与一些较早的研究相比，通过增强的测量能力和平台，Start08将在目标动态过程的影响下更深入地了解示踪剂及其关系的行为，并扩展数据库，以建立用于测试模型的理论框架。该项目以重要的方式支持社区研究能力的发展。 Start08将在工具/分析大气化学和与建模者和其他科学团队成员合作进行工具/分析大气化学和数据分析中培训研究生和博士后科学家。 Start08项目的研究将用于增强大气科学领域的当前研究生教育课程。计划进行其他教育外展活动，其中包括与正在进行的计划（例如国家海洋科学碗和项目影响）的互动。