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Winter-Spring Hydroperoxide Measurements and Photochemistry Over Northcentral North America During TOPSE

TOPSE 期间北美中北部冬春季氢过氧化物测量和光化学

基本信息

批准号：
9907808
负责人：
Brian Heikes
金额：
$ 28万
依托单位：
University of Rhode Island
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-09-15 至 2002-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9907808&HistoricalAwards=false
关键词：
Winter Spring Hydroperoxide Measurements Photochemistry

项目摘要

This project involves the measurement of tropospheric mixing ratios of hydrogen peroxide, H202, methylhydroperoxide, CH3OOH, and other organic hydroperoxides, e.g., CH3C(O)OOH, CH3CH2OOH, HOCH2OOH, on board the NCAR C-130 aircraft during the Tropospheric Ozone Production about the Spring Equinox experiment (TOPSE). TOPSE is a multi-investigator, multi-institutional program designed to study the springtime photochemistry of ozone and other contaminant compounds over the mid-latitude to polar Northern Hemisphere during the transition from winter to spring conditions. Hydrogen peroxide is a direct product of perhydroxyl radicals and the organic hydroperoxides are intermediates in the oxidation of most hydrocarbons, as well as, being products of organic peroxyl and perhydroxyl radicals. It is the peroxyl radicals, as well as, nitric oxide which are necessary for new ozone production. The hydroperoxides will be measured in situ using an established airborne methodology involving aqueous collection of the gaseous hydroperoxides followed by HPLC separation and fluorescence detection of a hydroperoxide derivative. The TOPSE airborne hydroperoxide measurements will provide a unique set of distribution measurements for this region and time of year and are desirable for comparison with the results of developing global 3-dimensional coupled dynamic and photochemical models.

该项目涉及测量过氧化氢、H2 O2、甲基氢过氧化物、CH 3 OOH和其他有机氢过氧化物的对流层混合比，CH 3C（O）OOH，CH 3CH 2 OOH，HOCH 2 OOH，在NCAR C-130飞机上，在春分实验（TOPSE）的对流层臭氧生产期间。TOPSE是一个多研究者、多机构的计划，旨在研究从冬季到春季条件过渡期间中纬度到极地北方半球臭氧和其他污染物化合物的春季光化学。过氧化氢是过羟基自由基的直接产物，有机氢过氧化物是大多数烃氧化的中间体，也是有机过氧基和过羟基自由基的产物。这是过氧自由基，以及，一氧化氮是必要的新的臭氧生产。氢过氧化物将使用已建立的空气传播方法进行原位测量，该方法包括气态氢过氧化物的水收集，然后进行HPLC分离和氢过氧化物衍生物的荧光检测。 TOPSE气载氢过氧化物测量将为该地区和一年中的时间提供一套独特的分布测量，并与开发全球三维耦合动力学和光化学模型的结果进行比较。