Reactive, Volatile, and Highly Soluble Constitutents in Liquid Water Clouds

H202被认为是云滴中二氧化硫的重要氧化剂。有证据表明，它可能被夹带到混合良好的边界层顶部形成的云中。在这些情况下，SO2氧化为硫酸盐不仅取决于SO2/H202的比率，而且还取决于云上空气进入云的夹带。机载实验将在怀俄明州的麋鹿山附近进行，与麋鹿山天文台（EMO）计划的实验研究相结合，允许PIs通过(1)比较EMO的空气中H2O2测量值与地面H2O2测量值，(2)在边界层空气和云层空气中使用空气中释放的示踪剂SF6来研究夹带过程。在EMO监测示踪剂的同时，(3)比较了势温的垂直剖面，以寻找云顶逆温夹带的证据；(4)将EMO和飞机测量的液态水浓度和液滴光谱与凝结过程的绝热模型进行了比较。

H202 is believed to be an important oxidant of SO2 in cloud droplets. There is evidence to suggest that it may be entrained into clouds that form at the top of well mixed boundary layers. In these situations SO2 oxidation to sulfate depends not only on the SO2/H202 ratio but also upon the entrainment of above cloud air into the cloud. Airborne experiments will be conducted near Elk Mountain, Wyoming in concert with experimental studies planned for the Elk Mountain Observatory (EMO) to allow the PIs to investigate the entrainment process by (1) comparing airborne H2O2 measurements with surface H2O2 measurements at EMO, (2) using airborne releases of a tracer, SF6, both in the boundary layer air and in the above cloud air, while monitoring the tracer at EMO, (3) comparing vertical profiles of potential temperature for evidence of entrainment across the cloud-capping inversion, and (4) comparing liquid water concentration and droplet spectra, measured at EMO and from aircraft, with an adiabatic model of the condensation process.