Reactive Gas Chemistry in the Dome C Snowpack and its Influence on Surface Layer Chemistry and Ice Core Records

Dome C 积雪中的活性气体化学及其对表层化学和冰芯记录的影响

• 批准号: 1142145
• 负责人: Detlev Helmig
• 金额: $ 40.94万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1142145&HistoricalAwards=false
• 关键词: Reactive; Gas; Chemistry; Dome; Snowpack

This US-French collaboration seeks to further our understanding of the photochemical processes taking place in snow and firn, and the influences they may have on surface exchange between snowpack and the polar atmosphere. Such processes potentially impact the atmospheric composition of trace gases over the Antarctic continent. Vertically and temporally resolved records of ozone, nitrogen oxides (NOx), CO as well as selected hydrocarbons in the lower 10m of the atmosphere at Dome C will be sought over the course of this ~1+ season. Shading perturbation experiments will also be undertaken to investigate photochemical transformations of photochemical oxidants in interstitial snowpack air. Similar measurements that have been made at Summit (Greenland) will provide a basis for comparison, and a further refinement of a physical and chemical snowpack model depicting our understanding of snowpack-atmosphere chemical cycling in polar ice sheets. By providing the core of a CU graduate student research project, this effort fosters international research connections.

这项美法合作旨在进一步了解雪和积雪中发生的光化学过程，以及它们对积雪和极地大气之间表面交换的影响。这些过程可能影响南极大陆上空大气中痕量气体的构成。 垂直和时间分辨记录臭氧，氮氧化物（NOx），CO以及选定的碳氢化合物在低10米的大气在圆顶C将寻求在这个过程中的~1+季节。阴影扰动实验也将进行调查光化学氧化剂在间隙积雪空气中的光化学转化。 在Summit（格陵兰）进行的类似测量将提供比较的基础，并进一步完善物理和化学积雪模型，描述我们对极地冰盖积雪-大气化学循环的理解。 通过提供CU研究生研究项目的核心，这一努力促进了国际研究联系。