Three-Dimensional (3D) Modeling and Observational Studies of Lightning-Produced Nitric Oxides

闪电产生的一氧化氮的三维 (3D) 建模和观测研究

• 批准号: 0321985
• 负责人: John Helsdon
• 金额: $ 37.59万
• 依托单位: South Dakota School of Mines and Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-06-01 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0321985&HistoricalAwards=false
• 关键词: Three; Dimensional; 3D; Modeling; Observational

This project continues and extends upon past studies investigating NOx (reactive nitrogen oxides: the sum of nitric oxide, NO, and nitrogen dioxide, NO2) formation in thunderstorms, using a combination of in situ observations and numerical storm simulations to gain a better estimate of nitrogen oxides production by lightning and subsequent transport throughout the thundercloud. The work will result in a better understanding of how reactive oxidized nitrogen is distributed within thunderstorms as it is generated by lightning and affected by subsequent chemical reactions. The project involves modeling and field measurements, explicit cloud-scale modeling to account for several critical processes of the in-cloud lightning discharge constrained by aircraft measurements of meteorological parameters and NO within the electrically active convective cloud cell. Broader impacts of this research include model developments that will improve performance in terms of robustness and representativeness for cloud-scale models used to simulate and quantify the effect of large electrically-active convective storms on the production and redistribution of photochemically active oxidants, with particular emphasis on further constraining the highly uncertain global NOx budget - an important consideration with regard to global climate. The project includes graduate student research training and results from the study will be used in teaching.

该项目继续并扩展了过去的研究调查氮氧化物（活性氮氧化物：一氧化氮，NO和二氧化氮，NO2的总和）形成雷暴，使用现场观测和数值风暴模拟相结合，以获得更好的估计氮氧化物生产闪电和随后的运输整个雷暴云。 这项工作将使人们更好地了解雷暴中的活性氧化氮是如何分布的，因为它是由闪电产生的，并受到随后的化学反应的影响。 该项目涉及建模和现场测量，明确的云尺度建模，以解释几个关键过程的云闪电放电的飞机测量的气象参数和NO内的电活性对流云单元的约束。 这项研究的更广泛的影响包括模型开发，这将提高云尺度模型的鲁棒性和代表性，用于模拟和量化大型电活性对流风暴对光化学活性氧化剂的产生和再分布的影响，特别强调进一步限制高度不确定的全球氮氧化物预算-全球气候方面的一个重要考虑因素。 该项目包括研究生研究培训，研究结果将用于教学。