Project Science Activities and Trace Gas Investigations from Whole Air Sampling on the NCAR GV Aircraft During the Convective Transport of Active Species in the Tropics Experiment
Project Science Activities and Trace Gas Investigations from Whole Air Sampling on the NCAR GV Aircraft During the Convective Transport of Active Species in the Tropics Experiment
批准号:
1261689
负责人:
Elliot Atlas
金额:
$50.0万
依托单位:
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
项目状态:
已结题
起止时间:
2013-09-01 至 2017-08-31
中文摘要
该项目涉及测量从NCAR GV飞机上的HAIS先进全空气采样器(AWAS)收集的各种有机微量气体,作为热带活动物种对流输送(CONTRAST)实验的一部分,该实验计划于2014年1月至2月在关岛进行。CONTRAST旨在测量反应性化学物质进入西太平洋暖池区热带对流层顶过渡层(TTL)的化学性质和输送。待测的微量气体由一系列有机分子组成,包括短寿命和长寿命的卤代烃化合物,以及非甲烷碳氢化合物、有机硝酸盐和选定的硫种。这些气体将提供诊断卤素转化和TTL预算的信息,估计UT/LS中空气的相对年龄,并区分该地区的气团来源。在寒带冬季,热带太平洋微量气体及其降解产物进入平流层低层的来源、化学和运输可以实质性地影响平流层低层的化学。该项目将通过提供一套独特的基准测量,特别是在活性卤素化学的表征方面,改进面向过程的化学/气候模型及其验证。
英文摘要
This project involves the measurement of a wide range of organic trace gases collected from the HAIS Advanced Whole Air Sampler (AWAS) on the NCAR GV aircraft as part of the Convective Transport of Active Species in the Tropics (CONTRAST) experiment proposed to take place during January and February 2014 from the island of Guam. CONTRAST is designed to measure the chemistry and transport of reactive chemical species into the tropical Tropopause Transition Layer (TTL) over the Western Pacific warm pool area. The trace gases to be measured consist of a range of organic molecules, including a both short-lived and long-lived halocarbon compounds, as well as non-methane hydrocarbons, organic nitrates, and selected sulfur species. These gases will provide information to diagnose halogen transformations and budget of the TTL, to estimate relative age of air in the UT/LS, and to distinguish air mass sources in the region.The sources, chemistry, and transport of trace gases and their degradation products into the lower stratosphere in the tropical Pacific during the boreal winter season can substantially impact the chemistry of the lower stratosphere. This project will improve process-oriented chemistry/climate models and their validation by providing a unique suite of benchmark measurements, especially in the characterization of active halogen chemistry.
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