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.

这种法国合作旨在进一步了解我们对在雪和FIRN中发生的光化学过程的理解，以及它们可能对积雪和极地氛围之间的地面交换产生的影响。这种过程可能会影响南极大陆上痕量气体的大气组成。 在这个〜1+季节的过程中，将寻求垂直和时间解决的臭氧，氮氧化物（NOX），CO以及在圆顶C下10m大气中选定的碳氢化合物的记录。还将进行阴影扰动实验，以研究间质积雪空气中光化学氧化剂的光化学转化。 在山顶（格陵兰）进行的类似测量值将为比较提供基础，并进一步改进了物理和化学的积雪模型，描绘了我们对极地冰盖中的积雪 - 大圈化学循环的理解。 通过提供CU研究生研究项目的核心，这项工作促进了国际研究联系。