CAREER: The Atmospheric Chemistry of Ice and Snow

职业：冰雪的大气化学

• 批准号: 0845043
• 负责人: V Faye McNeill
• 金额: $ 57.65万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-03-01 至 2014-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0845043&HistoricalAwards=false
• 关键词: CAREER; Atmospheric; Chemistry; Ice; Snow

The principal investigator will carry out a laboratory research program aimed at better understanding and quantifying interactions of trace gases with ice and snow. A quantitative physical understanding of these interactions is critical for predicting the effects of climate change on atmospheric composition, for the interpretation of ice core chemical records, and for modeling atmospheric chemistry. Emphasis will be on several gases key to polar photochemistry: formaldehyde, hydrogen peroxide, nitrous acid, and peroxynitric acid. The principal tools will be (1) a flow tube reactor with ice-coated walls coupled with chemical ionization mass spectrometry for quantification of trace gases, and (2) the surface-specific technique ellipsometry to probe quasi-liquid layers (QLL) and quasi-brine layers (QBL) at ice surfaces of various compositions.The broader impacts component of this project will include involvement of one post-doc, one graduate student, and a K-12 science educator. Education/outreach will have three major thrusts: (1) "Science of the Atmosphere", a bilingual (English and Spanish) interactive web site designed to teach students, families and educators about air pollution, climate change, and other atmospheric science topics, (2) a research and curriculum development partnership with a New York City area K-12 science educator, and (3) laboratory activities with economically disadvantaged New York City public school students from groups that are underrepresented in science and engineering.

首席研究员将开展一项实验室研究计划，旨在更好地了解和量化痕量气体与冰雪的相互作用。 对这些相互作用的定量物理理解对于预测气候变化对大气成分的影响、解释冰芯化学记录以及建立大气化学模型至关重要。 重点将放在极性光化学的几种关键气体：甲醛，过氧化氢，亚硝酸和过氧硝酸。 主要工具将是（1）一个带有冰涂层壁的流管反应器，结合化学电离质谱法对痕量气体进行定量分析，以及（2）表面特异性技术椭圆偏振法，用于探测各种成分的冰表面的准液体层（QLL）和准盐水层（QBL）。也是一名K-12科学教育家 教育/外联将有三大重点：（1）“大气科学”，双语（英语和西班牙语）交互式网站，旨在向学生、家庭和教育工作者讲授空气污染、气候变化和其他大气科学主题，（2）与纽约市地区K-12科学教育工作者建立研究和课程开发伙伴关系，和（3）与经济上处于不利地位的纽约市公立学校学生的实验室活动，这些学生来自科学和工程方面代表性不足的群体。