Carbonyl Compounds and Peroxides in Cloud Water - A Field Study in the Northeastern U.S.

PI计划研究(1)天然碳氢化合物在空气中形成H2O2和HCHO的作用，(2)云层中H2O2和有机酸的液相形成。具体来说，他将连续测量气相、云水和白面山降水中的甲醛和过氧化物，同时测量其他关键的大气微量气体，包括O3、CO、NOy、SO2和选定的碳氢化合物和微量元素。目的是记录单个云事件的化学性质，并确定云水化学成分的季节性和气团特定差异。此外，PI计划进行有限的飞行计划，重点是在明确规定的气象条件下，在晴朗和多云的空气中测量H2O2和O3的水平和垂直剖面，包括空中云水收集。随着初步研究计划的成熟，他还将增加其他光化学重要物质的测量，如氢过氧化物和其他低分子羰基化合物（醛类和酮类）。

The PI plans to examine (1) involvement of natural hydrocarbons for the formation of H2O2 and HCHO in air and (2) liquid phase formation of H2O2 and organic acids in clouds. Specifically, he will conduct continuous measurements of formaldehyde and peroxides in the gas phase, in cloud water, and in precipitation at Whiteface Mountain with concurrent measurements of other key atmosheric trace gases, including O3, CO, NOy, SO2 and selected hydrocarbons and trace elements. The goal is to document the chemistry of individual cloud events and to determine seasonal and air mass specific differences in cloud water chemical composition. Additionally, the PI plans a limited flight program focussing on measuring horizontal and vertical profiles for H2O2 and O3 under clearly defined meteorological conditions in clear and cloudy air, including airborne cloud water collections. He will also add measurements of other photochemically important species such as hydroperoxides and other low molecular carbonyl compounds (aldehydes and ketones) as the initial research program matures.